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              "val": -7000000,
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              "accn": "0001156375-15-000108",
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            {
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            {
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            {
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            {
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              "val": 9300000,
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            {
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            {
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            {
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            {
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              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 19900000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "end": "2014-12-31",
              "val": 19900000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 16900000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26"
            },
            {
              "end": "2015-12-31",
              "val": 16900000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 20700000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
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              "form": "10-K",
              "filed": "2017-02-27"
            },
            {
              "end": "2016-12-31",
              "val": 20700000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 20600000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01"
            },
            {
              "end": "2017-12-31",
              "val": 20600000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-03-31",
              "val": 547800000,
              "accn": "0001156375-18-000047",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-05-03",
              "frame": "CY2018Q1I"
            },
            {
              "end": "2018-12-31",
              "val": 20300000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28"
            },
            {
              "end": "2018-12-31",
              "val": 20300000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 16300000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28"
            },
            {
              "end": "2019-12-31",
              "val": 16300000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 16400000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAggregateLosses": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss (Deprecated 2018-01-31)",
        "description": "Amount of unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer.",
        "units": {
          "USD": [
            {
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              "end": "2010-12-31",
              "val": 200000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010"
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          ]
        }
      },
      "AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAggregateLosses": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Loss (Deprecated 2018-01-31)",
        "description": "Amount of unrealized loss on securities classified as available-for-sale.",
        "units": {
          "USD": [
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 300000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010"
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          ]
        }
      },
      "AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value",
        "description": "This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 7400000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
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              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
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          ]
        }
      },
      "AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAggregateLosses": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss (Deprecated 2018-01-31)",
        "description": "Amount of unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months.",
        "units": {
          "USD": [
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 100000,
              "accn": "0001193125-11-050252",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value",
        "description": "This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 5400000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
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              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value",
        "description": "This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 2000000,
              "accn": "0001193125-11-050252",
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              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
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          ]
        }
      },
      "AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost": {
        "label": "Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10",
        "description": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
          "USD": [
            {
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              "accn": "0001193125-11-050252",
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            {
              "end": "2011-12-31",
              "val": 2300000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
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              "form": "10-K",
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            {
              "end": "2012-12-31",
              "val": 0,
              "accn": "0001156375-13-000007",
              "fy": 2012,
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              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012Q4I"
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            {
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001156375-14-000012",
              "fy": 2013,
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              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
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            {
              "end": "2014-12-31",
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              "accn": "0001156375-15-000014",
              "fy": 2014,
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              "form": "10-K",
              "filed": "2015-02-26",
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            {
              "end": "2015-12-31",
              "val": 0,
              "accn": "0001156375-16-000116",
              "fy": 2015,
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              "filed": "2016-02-26",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 5700000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
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            {
              "end": "2017-12-31",
              "val": 4200000,
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              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017Q4I"
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            {
              "end": "2018-12-31",
              "val": 4000000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
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              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018Q4I"
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            {
              "end": "2019-12-31",
              "val": 2800000,
              "accn": "0001156375-20-000013",
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            {
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              "accn": "0001156375-21-000020",
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              "frame": "CY2020Q4I"
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        }
      },
      "AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue": {
        "label": "Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10",
        "description": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
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              "val": 10400000,
              "accn": "0001193125-11-050252",
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              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 2600000,
              "accn": "0001156375-12-000016",
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              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
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            {
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              "fy": 2012,
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              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 0,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 0,
              "accn": "0001156375-16-000116",
              "fy": 2015,
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              "filed": "2016-02-26",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 5700000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 4300000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 3900000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 2900000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 3000000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
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          ]
        }
      },
      "AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost": {
        "label": "Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five",
        "description": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
          "USD": [
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              "end": "2010-12-31",
              "val": 1300000,
              "accn": "0001193125-11-050252",
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              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 3900000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 0,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 0,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 0,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 7300000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 7800000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 9100000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 5300000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 6200000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue": {
        "label": "Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year One Through Five",
        "description": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
          "USD": [
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              "end": "2010-12-31",
              "val": 1300000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 4300000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 0,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 0,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 0,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 7400000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 7800000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 9200000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 5400000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 6700000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
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              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost": {
        "label": "Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10",
        "description": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
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            {
              "end": "2010-12-31",
              "val": 4200000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 3800000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 800000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 800000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 700000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 700000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 7400000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 7100000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 5400000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 6400000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 6700000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue": {
        "label": "Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 10",
        "description": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing after tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 4100000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 3700000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 400000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 400000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 400000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 300000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 7200000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 7500000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 5200000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 6900000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 7800000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost": {
        "label": "Available-for-sale Securities, Debt Maturities, Amortized Cost Basis (Deprecated 2014-01-31)",
        "description": "Amount of available-for-sale debt securities at cost, net of adjustments, which include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 21400000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 15200000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 18300000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 19100000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesDebtMaturitiesFairValue": {
        "label": "Available-for-sale Securities, Debt Maturities, Fair Value (Deprecated 2011-01-31)",
        "description": "This item represents the total of all debt securities grouped by maturity dates, at fair value, which are categorized neither as held-to-maturity nor trading securities.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 21400000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost": {
        "label": "Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, Year One",
        "description": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 5600000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 5200000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 17500000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 18300000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 19100000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 16100000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 200000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 1500000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 1800000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 1800000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 700000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue": {
        "label": "Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, Year One",
        "description": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 5600000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 5200000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 17500000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 18300000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 19100000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 16200000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 200000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 1500000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 1800000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 1800000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 700000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesDebtSecurities": {
        "label": "Debt Securities, Available-for-sale",
        "description": "Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 15800000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 17900000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 18700000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 19500000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 16500000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 20500000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 21100000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 20100000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 17000000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 18200000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesGrossUnrealizedGains": {
        "label": "Available-for-sale Securities, Gross Unrealized Gain",
        "description": "Amount of unrealized gain before deducting unrealized loss on investments in debt and equity securities classified as available-for-sale securities.",
        "units": {
          "USD": [
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 300000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010"
            }
          ]
        }
      },
      "AvailableforsaleSecuritiesGrossUnrealizedGain": {
        "label": "Available-for-sale Securities, Gross Unrealized Gains (Deprecated 2013-01-31)",
        "description": "This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 800000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "BankruptcyClaimsAmountOfClaimsSettled": {
        "label": "Bankruptcy Claims, Amount of Claims Settled",
        "description": "Amount of bankruptcy claim settled.",
        "units": {
          "USD": [
            {
              "end": "2013-11-01",
              "val": 29000000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2013-11-01",
              "val": 29000000,
              "accn": "0001156375-13-000140",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-11-08"
            }
          ]
        }
      },
      "BuildingsAndImprovementsGross": {
        "label": "Buildings and Improvements, Gross",
        "description": "Amount before accumulated depreciation of building structures held for productive use including addition, improvement, or renovation to the structure, including, but not limited to, interior masonry, interior flooring, electrical, and plumbing.",
        "units": {
          "USD": [
            {
              "end": "2009-12-31",
              "val": 438800000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 454900000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "BusinessAcquisitionContingentConsiderationAtFairValue": {
        "label": "Business Acquisition, Contingent Consideration, at Fair Value (Deprecated 2013-01-31)",
        "description": "Fair value, as of the acquisition date, of potential payments under the contingent consideration arrangement including cash and shares.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 9500000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 10300000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 12600000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2012Q4I"
            }
          ]
        }
      },
      "BusinessAcquisitionsProFormaNetIncomeLoss": {
        "label": "Business Acquisition, Pro Forma Net Income (Loss)",
        "description": "The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.",
        "units": {
          "USD": [
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 4043300000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 2030800000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2018"
            }
          ]
        }
      },
      "BusinessAcquisitionsProFormaRevenue": {
        "label": "Business Acquisition, Pro Forma Revenue",
        "description": "The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.",
        "units": {
          "USD": [
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 4388400000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 4983800000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2018"
            }
          ]
        }
      },
      "BusinessCombinationConsiderationTransferredLiabilitiesIncurred": {
        "label": "Business Combination, Consideration Transferred, Liabilities Incurred",
        "description": "Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.",
        "units": {
          "USD": [
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 6700000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2018"
            }
          ]
        }
      },
      "BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1": {
        "label": "Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability",
        "description": "Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.",
        "units": {
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              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": -7300000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": -7300000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-09-30",
              "val": 0,
              "accn": "0001156375-15-000108",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-11-06"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": -3600000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": -3600000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": -3600000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-09-30",
              "val": -7000000,
              "accn": "0001156375-15-000108",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-11-06"
            },
            {
              "start": "2015-01-01",
              "end": "2015-09-30",
              "val": -7000000,
              "accn": "0001156375-16-000255",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-11-04"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": -7000000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": -7000000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": -7000000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-03-31",
              "val": -10300000,
              "accn": "0001156375-17-000045",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-04",
              "frame": "CY2016Q1"
            },
            {
              "start": "2016-01-01",
              "end": "2016-06-30",
              "val": -10500000,
              "accn": "0001156375-17-000080",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-08-02"
            },
            {
              "start": "2016-01-01",
              "end": "2016-09-30",
              "val": 0,
              "accn": "0001156375-16-000255",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-11-04"
            },
            {
              "start": "2016-01-01",
              "end": "2016-09-30",
              "val": -26800000,
              "accn": "0001156375-17-000108",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-11-02"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 0,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 0,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-03-31",
              "val": -11600000,
              "accn": "0001156375-17-000045",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-04",
              "frame": "CY2017Q1"
            },
            {
              "start": "2017-01-01",
              "end": "2017-06-30",
              "val": -12100000,
              "accn": "0001156375-17-000080",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-08-02"
            },
            {
              "start": "2017-01-01",
              "end": "2017-09-30",
              "val": -30500000,
              "accn": "0001156375-17-000108",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-11-02"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 0,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017"
            }
          ]
        }
      },
      "BusinessCombinationContingentConsiderationLiability": {
        "label": "Business Combination, Contingent Consideration, Liability",
        "description": "Amount of liability recognized arising from contingent consideration in a business combination.",
        "units": {
          "USD": [
            {
              "end": "2013-12-31",
              "val": 15700000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 0,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 6700000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08"
            },
            {
              "end": "2018-12-31",
              "val": 6700000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07"
            },
            {
              "end": "2018-12-31",
              "val": 6700000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06"
            },
            {
              "end": "2018-12-31",
              "val": 6700000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-03-31",
              "val": 6900000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 500000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 0,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 0,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            }
          ]
        }
      },
      "CapitalizedComputerSoftwareGross": {
        "label": "Capitalized Computer Software, Gross",
        "description": "Amount before accumulated amortization of capitalized costs for computer software, including but not limited to, acquired and internally developed computer software.",
        "units": {
          "USD": [
            {
              "end": "2009-12-31",
              "val": 222600000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 247400000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsDue": {
        "label": "Capital Leases, Future Minimum Payments Due",
        "description": "Amount of minimum lease payments for capital leases.",
        "units": {
          "USD": [
            {
              "end": "2019-03-31",
              "val": 209900000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 207300000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 202300000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 197400000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 180500000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsDueCurrent": {
        "label": "Capital Leases, Future Minimum Payments Due, Next Twelve Months",
        "description": "Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2019-03-31",
              "val": 16900000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 16900000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 16900000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 16900000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 17000000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsDueInFiveYears": {
        "label": "Capital Leases, Future Minimum Payments Due in Five Years",
        "description": "Amount of minimum lease payments for capital leases due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2019-03-31",
              "val": 17400000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 17400000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 17400000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 17400000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 17500000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsDueInFourYears": {
        "label": "Capital Leases, Future Minimum Payments Due in Four Years",
        "description": "Amount of minimum lease payments for capital leases due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2019-03-31",
              "val": 17200000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 17200000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 17200000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 17200000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 17400000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsDueInThreeYears": {
        "label": "Capital Leases, Future Minimum Payments Due in Three Years",
        "description": "Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2019-03-31",
              "val": 17100000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 17100000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 17100000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 17100000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 17200000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsDueInTwoYears": {
        "label": "Capital Leases, Future Minimum Payments Due in Two Years",
        "description": "Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2019-03-31",
              "val": 16900000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 17000000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 17000000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 17000000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 17100000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsDueThereafter": {
        "label": "Capital Leases, Future Minimum Payments Due Thereafter",
        "description": "Amount of minimum lease payments for capital leases due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
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              "end": "2019-03-31",
              "val": 111800000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 111800000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 111800000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 111800000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 94300000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
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          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments": {
        "label": "Capital Leases, Future Minimum Payments, Interest Included in Payments",
        "description": "Amount necessary to reduce net minimum lease payments to present value for capital leases.",
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            {
              "end": "2019-03-31",
              "val": 23600000,
              "accn": "0001156375-19-000039",
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              "form": "10-Q",
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              "end": "2019-06-30",
              "val": 103200000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
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              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 100900000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 98500000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
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              "frame": "CY2019Q4I"
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              "accn": "0001156375-21-000020",
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              "form": "10-K",
              "filed": "2021-02-26",
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          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments": {
        "label": "Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments",
        "description": "Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes.",
        "units": {
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            {
              "end": "2019-03-31",
              "val": 186300000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 104100000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
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              "frame": "CY2019Q2I"
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            {
              "end": "2019-09-30",
              "val": 101400000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 98900000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
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            {
              "end": "2020-12-31",
              "val": 91500000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
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          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsRemainderOfFiscalYear": {
        "label": "Capital Leases, Future Minimum Payments, Remainder of Fiscal Year",
        "description": "Amount of minimum lease payments for capital leases due in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2019-03-31",
              "val": 12600000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 9900000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 4900000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
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          ]
        }
      },
      "CashAcquiredFromAcquisition": {
        "label": "Cash Acquired from Acquisition",
        "description": "The cash inflow associated with the acquisition of business during the period (for example, cash that was held by the acquired business).",
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              "end": "2007-12-31",
              "val": 116000000,
              "accn": "0001193125-10-043180",
              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26",
              "frame": "CY2007"
            },
            {
              "start": "2008-01-01",
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              "val": 0,
              "accn": "0001193125-10-043180",
              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 0,
              "accn": "0001193125-10-043180",
              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26",
              "frame": "CY2009"
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          ]
        }
      },
      "CashAndCashEquivalentsAtCarryingValue": {
        "label": "Cash and Cash Equivalents, at Carrying Value",
        "description": "Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.",
        "units": {
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              "val": 969500000,
              "accn": "0001193125-10-043180",
              "fy": 2009,
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              "form": "10-K",
              "filed": "2010-02-26",
              "frame": "CY2006Q4I"
            },
            {
              "end": "2007-12-31",
              "val": 845300000,
              "accn": "0001193125-09-187481",
              "fy": 2009,
              "fp": "Q2",
              "form": "10-Q/A",
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              "fy": 2009,
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              "form": "10-K",
              "filed": "2010-02-26"
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            {
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              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2007Q4I"
            },
            {
              "end": "2008-06-30",
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              "accn": "0001193125-09-187481",
              "fy": 2009,
              "fp": "Q2",
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              "frame": "CY2008Q3I"
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              "accn": "0001193125-09-187481",
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              "accn": "0001193125-10-043180",
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              "form": "10-K",
              "filed": "2010-02-26"
            },
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              "fy": 2010,
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              "filed": "2010-05-07"
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              "end": "2008-12-31",
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              "fy": 2010,
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              "filed": "2010-08-06"
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              "accn": "0001193125-10-250139",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-11-05"
            },
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              "end": "2008-12-31",
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              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "end": "2008-12-31",
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              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2008Q4I"
            },
            {
              "end": "2009-03-31",
              "val": 339200000,
              "accn": "0001193125-10-112933",
              "fy": 2010,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2010-05-07",
              "frame": "CY2009Q1I"
            },
            {
              "end": "2009-06-30",
              "val": 448700000,
              "accn": "0001193125-09-187481",
              "fy": 2009,
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              "form": "10-Q/A",
              "filed": "2009-09-04"
            },
            {
              "end": "2009-06-30",
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              "accn": "0001193125-10-181102",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-08-06",
              "frame": "CY2009Q2I"
            },
            {
              "end": "2009-09-30",
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              "accn": "0001193125-09-227674",
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              "form": "10-Q",
              "filed": "2009-11-06"
            },
            {
              "end": "2009-09-30",
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              "accn": "0001193125-10-250139",
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              "frame": "CY2009Q3I"
            },
            {
              "end": "2009-12-31",
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              "accn": "0001193125-10-043180",
              "fy": 2009,
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              "filed": "2010-02-26"
            },
            {
              "end": "2009-12-31",
              "val": 260600000,
              "accn": "0001193125-10-112933",
              "fy": 2010,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2010-05-07"
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            {
              "end": "2009-12-31",
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              "accn": "0001193125-10-181102",
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              "fp": "Q2",
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            },
            {
              "end": "2009-12-31",
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              "fy": 2010,
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            },
            {
              "end": "2009-12-31",
              "val": 260600000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            },
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              "end": "2009-12-31",
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              "accn": "0001193125-11-134231",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-05-10"
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              "end": "2009-12-31",
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              "accn": "0001193125-11-212308",
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              "form": "10-Q",
              "filed": "2011-08-05"
            },
            {
              "end": "2009-12-31",
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              "accn": "0001193125-11-304112",
              "fy": 2011,
              "fp": "Q3",
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              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28"
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              "end": "2009-12-31",
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              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-03-31",
              "val": 444200000,
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              "fy": 2010,
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              "form": "10-Q",
              "filed": "2010-05-07"
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              "accn": "0001193125-11-134231",
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              "frame": "CY2010Q1I"
            },
            {
              "end": "2010-06-30",
              "val": 363600000,
              "accn": "0001193125-10-181102",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-08-06"
            },
            {
              "end": "2010-06-30",
              "val": 363600000,
              "accn": "0001193125-11-212308",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-05",
              "frame": "CY2010Q2I"
            },
            {
              "end": "2010-09-30",
              "val": 568200000,
              "accn": "0001193125-10-250139",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-11-05"
            },
            {
              "end": "2010-09-30",
              "val": 568200000,
              "accn": "0001193125-11-304112",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-09",
              "frame": "CY2010Q3I"
            },
            {
              "end": "2010-12-31",
              "val": 855200000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "end": "2010-12-31",
              "val": 855200000,
              "accn": "0001193125-11-134231",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-05-10"
            },
            {
              "end": "2010-12-31",
              "val": 855200000,
              "accn": "0001193125-11-212308",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-05"
            },
            {
              "end": "2010-12-31",
              "val": 855200000,
              "accn": "0001193125-11-304112",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-09"
            },
            {
              "end": "2010-12-31",
              "val": 855200000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28"
            },
            {
              "end": "2010-12-31",
              "val": 855200000,
              "accn": "0001156375-12-000044",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-08"
            },
            {
              "end": "2010-12-31",
              "val": 855200000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08"
            },
            {
              "end": "2010-12-31",
              "val": 855200000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08"
            },
            {
              "end": "2010-12-31",
              "val": 855200000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01"
            },
            {
              "end": "2010-12-31",
              "val": 855200000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-03-31",
              "val": 664700000,
              "accn": "0001193125-11-134231",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-05-10"
            },
            {
              "end": "2011-03-31",
              "val": 664700000,
              "accn": "0001156375-12-000044",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-08",
              "frame": "CY2011Q1I"
            },
            {
              "end": "2011-06-30",
              "val": 693600000,
              "accn": "0001193125-11-212308",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-05"
            },
            {
              "end": "2011-06-30",
              "val": 693600000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 829300000,
              "accn": "0001193125-11-304112",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-09",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-12-31",
              "val": 1042300000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28"
            },
            {
              "end": "2011-12-31",
              "val": 1042300000,
              "accn": "0001156375-12-000044",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-08"
            },
            {
              "end": "2011-12-31",
              "val": 1042300000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08"
            },
            {
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              "end": "2021-12-31",
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              "accn": "0001156375-22-000076",
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            {
              "end": "2021-12-31",
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              "fp": "FY",
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            {
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              "accn": "0001156375-23-000020",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-27"
            },
            {
              "end": "2022-12-31",
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              "accn": "0001156375-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-28",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
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              "accn": "0001156375-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-28"
            },
            {
              "end": "2023-12-31",
              "val": 3400000,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 5300000,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2024Q4I"
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        }
      },
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        "label": "Deferred Tax Assets, Other",
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              "val": 119000000,
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              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2016Q4I"
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            {
              "end": "2017-12-31",
              "val": 37200000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
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              "filed": "2018-03-01"
            },
            {
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              "val": 37200000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
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              "filed": "2019-02-28",
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              "accn": "0001156375-19-000010",
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              "form": "10-K",
              "filed": "2019-02-28"
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            {
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            {
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              "accn": "0001156375-21-000020",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
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            },
            {
              "end": "2020-12-31",
              "val": 59100000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
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              "filed": "2021-02-26"
            },
            {
              "end": "2020-12-31",
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              "accn": "0001156375-22-000076",
              "fy": 2021,
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              "form": "10-K",
              "filed": "2022-02-25",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-12-31",
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              "accn": "0001156375-22-000076",
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            {
              "end": "2021-12-31",
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              "frame": "CY2021Q4I"
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            {
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              "accn": "0001156375-23-000020",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-27"
            },
            {
              "end": "2022-12-31",
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              "accn": "0001156375-24-000010",
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              "fp": "FY",
              "form": "10-K",
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              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 131400000,
              "accn": "0001156375-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-28"
            },
            {
              "end": "2023-12-31",
              "val": 131400000,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 123900000,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2024Q4I"
            }
          ]
        }
      },
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        "label": "Deferred Tax Assets, Property, Plant and Equipment",
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        "units": {
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              "val": 31400000,
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              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2016Q4I"
            },
            {
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              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01"
            },
            {
              "end": "2017-12-31",
              "val": 5500000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 300000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28"
            },
            {
              "end": "2018-12-31",
              "val": 300000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 0,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 0,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 12800000,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2024Q4I"
            }
          ]
        }
      },
      "DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsOther": {
        "label": "Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Other",
        "description": "Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from compensation and benefits, classified as other.",
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              "val": 11300000,
              "accn": "0001193125-11-050252",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
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              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "end": "2010-12-31",
              "val": 13000000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 20300000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
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          ]
        }
      },
      "DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost": {
        "label": "Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost",
        "description": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation.",
        "units": {
          "USD": [
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              "end": "2009-12-31",
              "val": 32000000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
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              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 42600000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "end": "2010-12-31",
              "val": 42600000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 40000000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
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          ]
        }
      },
      "DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities": {
        "label": "Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Accrued Liabilities",
        "description": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities.",
        "units": {
          "USD": [
            {
              "end": "2009-12-31",
              "val": 51500000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
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              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 42900000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "end": "2010-12-31",
              "val": 42900000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 46400000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
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          ]
        }
      },
      "DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses": {
        "label": "Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Impairment Losses",
        "description": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from estimated impairment losses.",
        "units": {
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              "end": "2009-12-31",
              "val": 145900000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
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              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
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              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "end": "2010-12-31",
              "val": 145800000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
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              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 37800000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
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          ]
        }
      },
      "DeferredTaxAssetsUnrealizedCurrencyLosses": {
        "label": "Deferred Tax Assets, Unrealized Currency Losses",
        "description": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from unrealized losses on foreign currency transactions.",
        "units": {
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              "end": "2009-12-31",
              "val": 152000000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
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              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 146300000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
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              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "end": "2010-12-31",
              "val": 146300000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
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              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 44600000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
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              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
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          ]
        }
      },
      "DeferredTaxAssetsUnrealizedLossesOnTradingSecurities": {
        "label": "Deferred Tax Assets, Unrealized Losses on Trading Securities",
        "description": "Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from unrealized losses on trading securities.",
        "units": {
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              "end": "2009-12-31",
              "val": 54000000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
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              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 45900000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
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              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "end": "2010-12-31",
              "val": 45900000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
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              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010Q4I"
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            {
              "end": "2011-12-31",
              "val": 46400000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
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              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
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          ]
        }
      },
      "DeferredTaxAssetsValuationAllowance": {
        "label": "Deferred Tax Assets, Valuation Allowance",
        "description": "Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.",
        "units": {
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              "end": "2010-12-31",
              "val": 49400000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
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              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 7900000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
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              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 10000000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 11300000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26"
            },
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              "end": "2020-12-31",
              "val": 11300000,
              "accn": "0001156375-22-000076",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-25",
              "frame": "CY2020Q4I"
            },
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              "end": "2021-12-31",
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              "accn": "0001156375-22-000076",
              "fy": 2021,
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              "form": "10-K",
              "filed": "2022-02-25"
            },
            {
              "end": "2021-12-31",
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              "accn": "0001156375-23-000020",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-27",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-12-31",
              "val": 400000,
              "accn": "0001156375-23-000020",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-27"
            },
            {
              "end": "2022-12-31",
              "val": 400000,
              "accn": "0001156375-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-28",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 400000,
              "accn": "0001156375-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-28"
            },
            {
              "end": "2023-12-31",
              "val": 400000,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 0,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2024Q4I"
            }
          ]
        }
      },
      "DeferredTaxAssetsValuationAllowanceNoncurrent": {
        "label": "Deferred Tax Assets, Valuation Allowance, Noncurrent",
        "description": "Amount of valuation allowance of deferred tax asset attributable to deductible temporary differences and carryforwards, classified as noncurrent.",
        "units": {
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              "end": "2009-12-31",
              "val": 264400000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
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              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 258400000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
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              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "end": "2010-12-31",
              "val": 258400000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 43200000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28"
            },
            {
              "end": "2011-12-31",
              "val": 43200000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2011Q4I"
            },
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            },
            {
              "end": "2012-12-31",
              "val": 7575700000,
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              "fp": "FY",
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              "filed": "2014-03-03",
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            {
              "end": "2013-12-31",
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              "filed": "2014-03-03"
            },
            {
              "end": "2013-12-31",
              "val": 7434200000,
              "accn": "0001156375-15-000014",
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            {
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            {
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            {
              "end": "2015-12-31",
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            {
              "end": "2015-12-31",
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            {
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            {
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            {
              "end": "2016-12-31",
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            {
              "end": "2016-12-31",
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            {
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            {
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            {
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            {
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            {
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            {
              "end": "2017-12-31",
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            {
              "end": "2018-03-31",
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            {
              "end": "2018-06-30",
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              "accn": "0001156375-18-000083",
              "fy": 2018,
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            },
            {
              "end": "2018-09-30",
              "val": 4882700000,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2018-12-31",
              "val": 5665900000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
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              "filed": "2019-02-28"
            },
            {
              "end": "2018-12-31",
              "val": 5665900000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
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            {
              "end": "2018-12-31",
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            {
              "end": "2018-12-31",
              "val": 5665900000,
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            {
              "end": "2018-12-31",
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              "accn": "0001156375-20-000013",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
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            {
              "end": "2019-03-31",
              "val": 5662700000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 5645100000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 5614400000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 5635200000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
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          ]
        }
      },
      "DeferredTaxLiabilitiesPropertyPlantAndEquipment": {
        "label": "Deferred Tax Liabilities, Property, Plant and Equipment",
        "description": "Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.",
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              "val": 55000000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
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              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
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            {
              "end": "2010-12-31",
              "val": 60700000,
              "accn": "0001193125-11-050252",
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              "filed": "2011-02-28"
            },
            {
              "end": "2010-12-31",
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              "fy": 2011,
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              "filed": "2012-02-28",
              "frame": "CY2010Q4I"
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            {
              "end": "2011-12-31",
              "val": 77100000,
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              "fy": 2011,
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              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 0,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2018Q4I"
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            {
              "end": "2019-12-31",
              "val": 23300000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
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              "filed": "2020-02-28"
            },
            {
              "end": "2019-12-31",
              "val": 23300000,
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              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2019Q4I"
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            {
              "end": "2020-12-31",
              "val": 45700000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
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              "form": "10-K",
              "filed": "2021-02-26"
            },
            {
              "end": "2020-12-31",
              "val": 45700000,
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              "fy": 2021,
              "fp": "FY",
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            {
              "end": "2021-12-31",
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              "form": "10-K",
              "filed": "2022-02-25"
            },
            {
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              "accn": "0001156375-23-000020",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-27",
              "frame": "CY2021Q4I"
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            {
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              "accn": "0001156375-23-000020",
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              "filed": "2023-02-27"
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            {
              "end": "2022-12-31",
              "val": 30400000,
              "accn": "0001156375-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-28",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 1300000,
              "accn": "0001156375-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-28"
            },
            {
              "end": "2023-12-31",
              "val": 1300000,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 0,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2024Q4I"
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      },
      "DefinedBenefitPlanActualReturnOnPlanAssets": {
        "label": "Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)",
        "description": "Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses.",
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              "val": -19500000,
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              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2008"
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            {
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              "end": "2009-12-31",
              "val": 10700000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 12800000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010"
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          ]
        }
      },
      "DefinedBenefitPlanAmountsThatWillBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossInNextFiscalYear": {
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        "units": {
          "USD": [
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              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": -3200000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -4000000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012"
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            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": -1100000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
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      },
      "DefinedBenefitPlanAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossNextFiscalYear": {
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        "description": "Amount included in accumulated other comprehensive income (AOCI) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position, including gain (loss), prior service cost (credit), and transition asset (obligation).",
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              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": -2600000,
              "accn": "0001156375-15-000014",
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              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014"
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            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": -3500000,
              "accn": "0001156375-16-000116",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": -3500000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016"
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          ]
        }
      },
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        "label": "Defined Benefit Plan, Benefits Paid (Deprecated 2017-01-31)",
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        "units": {
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              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": -15600000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": -5300000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": -4400000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010"
            }
          ]
        }
      },
      "DefinedBenefitPlanContributionsByEmployer": {
        "label": "Defined Benefit Plan, Plan Assets, Contributions by Employer",
        "description": "Amount of contribution received by defined benefit plan from employer which increases plan assets.",
        "units": {
          "USD": [
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              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": 31000000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 8500000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 5200000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedAmortizationNextFiscalYear": {
        "label": "Defined Benefit Plan, Expected Amortization, Next Fiscal Year",
        "description": "Amount of cost (credit) included in accumulated other comprehensive (income) loss expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.",
        "units": {
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              "end": "2017-12-31",
              "val": -2900000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": -4600000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": -4400000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInFiveFiscalYearsThereafter": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter (Deprecated 2012-01-31)",
        "description": "The amount of the aggregate benefits expected to be paid in the five fiscal years thereafter (the aggregate amount of benefits expected to be paid in years 6 through 10 after the date of the latest statement of financial position).",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 62800000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearFive": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payments in Year Five (Deprecated 2012-01-31)",
        "description": "The amount of the benefits expected to be paid in Year 5.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 10000000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearFour": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payments in Year Four (Deprecated 2012-01-31)",
        "description": "The amount of the benefits expected to be paid in Year 4.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 9500000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearOne": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payments in Year One (Deprecated 2012-01-31)",
        "description": "The amount of the benefits expected to be paid in Year 1.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 7200000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearThree": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payments in Year Three (Deprecated 2012-01-31)",
        "description": "The amount of the benefits expected to be paid in Year 3.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 8600000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearTwo": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payments in Year Two (Deprecated 2012-01-31)",
        "description": "The amount of the benefits expected to be paid in Year 2.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 8200000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear": {
        "label": "Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year",
        "description": "Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year.",
        "units": {
          "USD": [
            {
              "end": "2020-12-31",
              "val": 6000000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-12-31",
              "val": 0,
              "accn": "0001156375-22-000076",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-25",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-12-31",
              "val": 0,
              "accn": "0001156375-23-000020",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-27",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 16900000,
              "accn": "0001156375-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-28",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 12200000,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 10100000,
              "accn": "0001156375-26-000009",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-26",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanFairValueOfPlanAssets": {
        "label": "Defined Benefit Plan, Plan Assets, Amount",
        "description": "Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.",
        "units": {
          "USD": [
            {
              "end": "2007-12-31",
              "val": 97900000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2007Q4I"
            },
            {
              "end": "2008-12-31",
              "val": 93800000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2008Q4I"
            },
            {
              "end": "2009-12-31",
              "val": 107700000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 121300000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanNetPeriodicBenefitCost": {
        "label": "Defined Benefit Plan, Net Periodic Benefit Cost (Credit)",
        "description": "Amount of net periodic benefit cost (credit) for defined benefit plan.",
        "units": {
          "USD": [
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 14500000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-06-30",
              "val": 8700000,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01"
            },
            {
              "start": "2017-04-01",
              "end": "2017-06-30",
              "val": 4300000,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01",
              "frame": "CY2017Q2"
            },
            {
              "start": "2017-01-01",
              "end": "2017-09-30",
              "val": 13000000,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02"
            },
            {
              "start": "2017-07-01",
              "end": "2017-09-30",
              "val": 4300000,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02",
              "frame": "CY2017Q3"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 17300000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-06-30",
              "val": 5100000,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01"
            },
            {
              "start": "2018-04-01",
              "end": "2018-06-30",
              "val": 2500000,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01",
              "frame": "CY2018Q2"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": 7600000,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02"
            },
            {
              "start": "2018-07-01",
              "end": "2018-09-30",
              "val": 2500000,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02",
              "frame": "CY2018Q3"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 10200000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018"
            }
          ]
        }
      },
      "DefinedBenefitPlanOtherCosts": {
        "label": "Defined Benefit Plan, Other Cost (Credit)",
        "description": "Amount of defined benefit plan cost (credit), classified as other.",
        "units": {
          "USD": [
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": -2200000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-06-30",
              "val": -700000,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01"
            },
            {
              "start": "2017-04-01",
              "end": "2017-06-30",
              "val": -400000,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01",
              "frame": "CY2017Q2"
            },
            {
              "start": "2017-01-01",
              "end": "2017-09-30",
              "val": -1000000,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02"
            },
            {
              "start": "2017-07-01",
              "end": "2017-09-30",
              "val": -300000,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02",
              "frame": "CY2017Q3"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": -1400000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-06-30",
              "val": -4500000,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01"
            },
            {
              "start": "2018-04-01",
              "end": "2018-06-30",
              "val": -2300000,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01",
              "frame": "CY2018Q2"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": -6700000,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02"
            },
            {
              "start": "2018-07-01",
              "end": "2018-09-30",
              "val": -2200000,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02",
              "frame": "CY2018Q3"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": -8900000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018"
            }
          ]
        }
      },
      "DefinedBenefitPlanServiceCost": {
        "label": "Defined Benefit Plan, Service Cost",
        "description": "Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.",
        "units": {
          "USD": [
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 16700000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-03-31",
              "val": 4600000,
              "accn": "0001156375-18-000047",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-05-03",
              "frame": "CY2017Q1"
            },
            {
              "start": "2017-01-01",
              "end": "2017-06-30",
              "val": 9400000,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01"
            },
            {
              "start": "2017-04-01",
              "end": "2017-06-30",
              "val": 4700000,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01",
              "frame": "CY2017Q2"
            },
            {
              "start": "2017-01-01",
              "end": "2017-09-30",
              "val": 14000000,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02"
            },
            {
              "start": "2017-07-01",
              "end": "2017-09-30",
              "val": 4600000,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02",
              "frame": "CY2017Q3"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 18700000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-03-31",
              "val": 4700000,
              "accn": "0001156375-18-000047",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-05-03",
              "frame": "CY2018Q1"
            },
            {
              "start": "2018-01-01",
              "end": "2018-06-30",
              "val": 9600000,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01"
            },
            {
              "start": "2018-04-01",
              "end": "2018-06-30",
              "val": 4800000,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01",
              "frame": "CY2018Q2"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": 14300000,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02"
            },
            {
              "start": "2018-07-01",
              "end": "2018-09-30",
              "val": 4700000,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02",
              "frame": "CY2018Q3"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 19100000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018"
            }
          ]
        }
      },
      "DefinedContributionPlanCostRecognized": {
        "label": "Defined Contribution Plan, Cost",
        "description": "Amount of cost for defined contribution plan.",
        "units": {
          "USD": [
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 9900000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 11200000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 11200000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 11700000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 11700000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 11700000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 11300000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 11300000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 11300000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 11800000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 11800000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 11800000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 13800000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 13800000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28"
            },
            {
              "start": "2018-01-01",
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              "start": "2019-01-01",
              "end": "2019-06-30",
              "val": 79200000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07"
            },
            {
              "start": "2019-04-01",
              "end": "2019-06-30",
              "val": 46300000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2"
            },
            {
              "start": "2019-01-01",
              "end": "2019-09-30",
              "val": 120600000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06"
            },
            {
              "start": "2019-07-01",
              "end": "2019-09-30",
              "val": 41400000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 158600000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 158600000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 158600000,
              "accn": "0001156375-22-000076",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-25",
              "frame": "CY2019"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 153200000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 153200000,
              "accn": "0001156375-22-000076",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-25"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 153200000,
              "accn": "0001156375-23-000020",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-27",
              "frame": "CY2020"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 147800000,
              "accn": "0001156375-22-000076",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-25"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 147800000,
              "accn": "0001156375-23-000020",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-27"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 147800000,
              "accn": "0001156375-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-28",
              "frame": "CY2021"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 134900000,
              "accn": "0001156375-23-000020",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-27"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 134900000,
              "accn": "0001156375-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-28"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 134900000,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2022"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 126000000,
              "accn": "0001156375-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-28"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 126000000,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 126000000,
              "accn": "0001156375-26-000009",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-26",
              "frame": "CY2023"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": 115100000,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": 115100000,
              "accn": "0001156375-26-000009",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-26",
              "frame": "CY2024"
            },
            {
              "start": "2025-01-01",
              "end": "2025-12-31",
              "val": 107500000,
              "accn": "0001156375-26-000009",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-26",
              "frame": "CY2025"
            }
          ]
        }
      },
      "DerivativeFairValueOfDerivativeAsset": {
        "label": "Derivative Asset, Fair Value, Gross Asset",
        "description": "Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.",
        "units": {
          "USD": [
            {
              "end": "2013-03-31",
              "val": 24100000,
              "accn": "0001156375-13-000050",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-05-08",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2013-06-30",
              "val": 84300000,
              "accn": "0001156375-13-000109",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2013-08-09",
              "frame": "CY2013Q2I"
            },
            {
              "end": "2013-06-30",
              "val": 84300000,
              "accn": "0001156375-13-000107",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-08-08"
            },
            {
              "end": "2013-09-30",
              "val": 0,
              "accn": "0001156375-13-000140",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-11-08",
              "frame": "CY2013Q3I"
            }
          ]
        }
      },
      "DerivativeFairValueOfDerivativeLiability": {
        "label": "Derivative Liability, Fair Value, Gross Liability",
        "description": "Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.",
        "units": {
          "USD": [
            {
              "end": "2012-09-30",
              "val": 30.1,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": -1000000,
              "accn": "0001156375-13-000140",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-11-08",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": -1000000,
              "accn": "0001156375-13-000109",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2013-08-09"
            },
            {
              "end": "2012-12-31",
              "val": -1000000,
              "accn": "0001156375-13-000107",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-08-08"
            },
            {
              "end": "2012-12-31",
              "val": -1000000,
              "accn": "0001156375-13-000050",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-05-08"
            }
          ]
        }
      },
      "DerivativeFinancialInstrumentsLiabilitiesFairValueDisclosure": {
        "label": "Derivative Financial Instruments, Liabilities, Fair Value Disclosure (Deprecated 2013-01-31)",
        "description": "Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date.",
        "units": {
          "USD": [
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              "end": "2010-12-31",
              "val": 11800000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 1000000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2012Q4I"
            }
          ]
        }
      },
      "DerivativeGainLossOnDerivativeNet": {
        "label": "Derivative, Gain (Loss) on Derivative, Net",
        "description": "Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.",
        "units": {
          "USD": [
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": 8100000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 0,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 8600000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": -8600000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2010"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": -8600000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": -100000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2011"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 0,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -100000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012"
            }
          ]
        }
      },
      "DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet": {
        "label": "Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net",
        "description": "The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.",
        "units": {
          "USD": [
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": -20000000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": -500000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011"
            }
          ]
        }
      },
      "DerivativeInstrumentsGainLossRecognizedInIncomeNet": {
        "label": "Derivative Instruments, Gain (Loss) Recognized in Income, Net (Deprecated 2013-01-31)",
        "description": "The amount of net gains and losses recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.",
        "units": {
          "USD": [
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": -2600000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": -100000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011"
            }
          ]
        }
      },
      "DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet": {
        "label": "Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net (Deprecated 2018-01-31)",
        "description": "The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.",
        "units": {
          "USD": [
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": -9700000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 0,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011"
            }
          ]
        }
      },
      "DerivativeInstrumentsLossRecognizedInIncome": {
        "label": "Derivative Instruments, Loss Recognized in Income (Deprecated 2013-01-31)",
        "description": "The amount of loss recognized in income during the period on derivative instruments designated and qualifying as hedging instruments in fair value hedges and related hedged items designated and qualifying in fair value hedges, on derivative instruments designated and qualifying as hedging instruments in cash flow hedges, and on derivative instruments not designated as hedging instruments.",
        "units": {
          "USD": [
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 8600000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010"
            },
            {
              "start": "2010-12-01",
              "end": "2010-12-31",
              "val": 8600000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28"
            }
          ]
        }
      },
      "DerivativeLiabilities": {
        "label": "Derivative Liability",
        "description": "Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.",
        "units": {
          "USD": [
            {
              "end": "2009-12-31",
              "val": 26300000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 11800000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "DerivativeLiabilitiesCurrent": {
        "label": "Derivative Liability, Current",
        "description": "Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.",
        "units": {
          "USD": [
            {
              "end": "2009-12-31",
              "val": 19300000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 11800000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "DerivativeLiabilitiesNoncurrent": {
        "label": "Derivative Liability, Noncurrent",
        "description": "Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.",
        "units": {
          "USD": [
            {
              "end": "2009-12-31",
              "val": 7000000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
            }
          ]
        }
      },
      "DerivativeNetHedgeIneffectivenessGainLoss": {
        "label": "Derivative, Net Hedge Ineffectiveness Gain (Loss)",
        "description": "Amount of gain (loss) from the ineffectiveness of the hedge.",
        "units": {
          "USD": [
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 8600000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 100000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 100000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 100000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 100000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 100000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001156375-16-000116",
              "fy": 2015,
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              "start": "2014-01-01",
              "end": "2014-06-30",
              "val": 0.2,
              "accn": "0001156375-14-000073",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-08-04"
            },
            {
              "start": "2014-01-01",
              "end": "2014-09-30",
              "val": 0.2,
              "accn": "0001156375-14-000132",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-11-03"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 0.2,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-03-31",
              "val": 0.2,
              "accn": "0001156375-15-000046",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-05-06",
              "frame": "CY2015Q1"
            },
            {
              "start": "2015-01-01",
              "end": "2015-06-30",
              "val": 0.2,
              "accn": "0001156375-15-000067",
              "fy": 2015,
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              "filed": "2015-08-05"
            },
            {
              "start": "2015-01-01",
              "end": "2015-09-30",
              "val": 0.2,
              "accn": "0001156375-15-000108",
              "fy": 2015,
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              "form": "10-Q",
              "filed": "2015-11-06"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 0.2,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 0.2,
              "accn": "0001156375-17-000016",
              "fy": 2016,
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              "form": "10-K",
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              "frame": "CY2016"
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          ]
        }
      },
      "FairValueLevel1ToLevel2TransfersAmount": {
        "label": "Fair Value, Level 1 to level 2 Transfers, Amount (Deprecated 2012-01-31)",
        "description": "The amount of the transfers of assets or liabilities measured on a recurring basis out of Level 1 of the fair value hierarchy into Level 2.",
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        "label": "Fair Value, Liability, Recurring Basis, Still Held, Unrealized Gain (Loss)",
        "description": "Amount of unrealized gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3) and still held.",
        "units": {
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              "filed": "2020-02-28",
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          ]
        }
      },
      "FairValueLiabilitiesMeasuredOnRecurringBasisDerivativeFinancialInstrumentsLiabilities": {
        "label": "Fair Value, Liabilities Measured on Recurring Basis, Derivative Financial Instruments, Liabilities (Deprecated 2011-01-31)",
        "description": "This element represents a certain statement of financial position liability caption which represents a class of liabilities, or which may include an individual liability, measured at fair value on a recurring basis.",
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            {
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            {
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            {
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        }
      },
      "FairValueMeasuredOnRecurringBasisInvestments": {
        "label": "Fair Value, Measured on Recurring Basis, Investments (Deprecated 2011-01-31)",
        "description": "This element represents a certain statement of financial position asset caption which represents a class of assets, or which may include an individual asset, measured at fair value on a recurring basis.",
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            {
              "end": "2010-12-31",
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              "frame": "CY2010Q4I"
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            {
              "end": "2011-03-31",
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              "accn": "0001193125-11-134231",
              "fy": 2011,
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              "form": "10-Q",
              "filed": "2011-05-10",
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          ]
        }
      },
      "FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements": {
        "label": "Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements",
        "description": "Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.",
        "units": {
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              "val": -7300000,
              "accn": "0001156375-13-000107",
              "fy": 2013,
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              "filed": "2013-08-08"
            },
            {
              "start": "2013-01-01",
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            {
              "start": "2013-01-01",
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              "val": -7300000,
              "accn": "0001156375-13-000140",
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            {
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            },
            {
              "start": "2019-01-01",
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              "accn": "0001156375-19-000114",
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            {
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            }
          ]
        }
      },
      "FinanceLeaseInterestExpense": {
        "label": "Finance Lease, Interest Expense",
        "description": "Amount of interest expense on finance lease liability.",
        "units": {
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            {
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              "accn": "0001156375-20-000039",
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              "form": "10-Q",
              "filed": "2020-05-06",
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            {
              "start": "2019-01-01",
              "end": "2019-06-30",
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              "accn": "0001156375-19-000087",
              "fy": 2019,
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              "accn": "0001156375-20-000079",
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            },
            {
              "start": "2019-04-01",
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              "val": 900000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-08-07"
            },
            {
              "start": "2019-04-01",
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              "accn": "0001156375-20-000079",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-08-05",
              "frame": "CY2019Q2"
            },
            {
              "start": "2019-01-01",
              "end": "2019-09-30",
              "val": 2700000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06"
            },
            {
              "start": "2019-01-01",
              "end": "2019-09-30",
              "val": 2700000,
              "accn": "0001156375-20-000119",
              "fy": 2020,
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              "form": "10-Q",
              "filed": "2020-11-04"
            },
            {
              "start": "2019-07-01",
              "end": "2019-09-30",
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              "accn": "0001156375-19-000114",
              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-11-06"
            },
            {
              "start": "2019-07-01",
              "end": "2019-09-30",
              "val": 900000,
              "accn": "0001156375-20-000119",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-11-04",
              "frame": "CY2019Q3"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
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              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28"
            },
            {
              "start": "2019-01-01",
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              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2019"
            },
            {
              "start": "2020-01-01",
              "end": "2020-03-31",
              "val": 900000,
              "accn": "0001156375-20-000039",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-05-06"
            },
            {
              "start": "2020-01-01",
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              "accn": "0001156375-21-000052",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
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              "frame": "CY2020Q1"
            },
            {
              "start": "2020-01-01",
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              "accn": "0001156375-20-000079",
              "fy": 2020,
              "fp": "Q2",
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            },
            {
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              "fy": 2021,
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            },
            {
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              "accn": "0001156375-20-000079",
              "fy": 2020,
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              "form": "10-Q",
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              "accn": "0001156375-21-000093",
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            {
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              "accn": "0001156375-21-000167",
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            {
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            },
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              "frame": "CY2020"
            },
            {
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              "accn": "0001156375-21-000052",
              "fy": 2021,
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            },
            {
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              "accn": "0001156375-21-000093",
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              "form": "10-Q",
              "filed": "2021-08-05"
            },
            {
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              "val": 1600000,
              "accn": "0001156375-22-000215",
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            },
            {
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              "val": 800000,
              "accn": "0001156375-21-000093",
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            },
            {
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              "accn": "0001156375-22-000215",
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            },
            {
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            {
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            },
            {
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            {
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              "accn": "0001156375-23-000129",
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            },
            {
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            },
            {
              "end": "2021-12-31",
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            {
              "end": "2023-09-30",
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              "end": "2023-12-31",
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              "frame": "CY2023Q4I"
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            {
              "end": "2024-03-31",
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            },
            {
              "end": "2024-06-30",
              "val": 221500000,
              "accn": "0001156375-24-000149",
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              "fp": "Q2",
              "form": "10-Q",
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              "frame": "CY2024Q2I"
            },
            {
              "end": "2024-09-30",
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              "accn": "0001156375-24-000200",
              "fy": 2024,
              "fp": "Q3",
              "form": "10-Q",
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              "frame": "CY2024Q3I"
            },
            {
              "end": "2024-12-31",
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              "accn": "0001156375-25-000021",
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            },
            {
              "end": "2025-03-31",
              "val": 221100000,
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              "form": "10-Q",
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              "frame": "CY2025Q1I"
            },
            {
              "end": "2025-06-30",
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              "accn": "0001156375-25-000182",
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              "frame": "CY2025Q2I"
            },
            {
              "end": "2025-09-30",
              "val": 221800000,
              "accn": "0001156375-25-000206",
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              "frame": "CY2025Q3I"
            },
            {
              "end": "2025-12-31",
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              "accn": "0001156375-26-000009",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-26",
              "frame": "CY2025Q4I"
            },
            {
              "end": "2026-03-31",
              "val": 214500000,
              "accn": "0001156375-26-000020",
              "fy": 2026,
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              "form": "10-Q",
              "filed": "2026-04-24",
              "frame": "CY2026Q1I"
            },
            {
              "end": "2026-06-30",
              "val": 214400000,
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              "form": "10-Q",
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              "frame": "CY2026Q2I"
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          ]
        }
      },
      "FiniteLivedIntangibleAssetsNet": {
        "label": "Finite-Lived Intangible Assets, Net",
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            {
              "end": "2024-12-31",
              "val": 2821600000,
              "accn": "0001156375-26-000009",
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              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-03-31",
              "val": 2773200000,
              "accn": "0001156375-25-000103",
              "fy": 2025,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2025-04-30",
              "frame": "CY2025Q1I"
            },
            {
              "end": "2025-06-30",
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            {
              "end": "2025-09-30",
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            {
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            {
              "end": "2025-12-31",
              "val": 2610700000,
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            },
            {
              "end": "2025-12-31",
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              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
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              "frame": "CY2025Q4I"
            },
            {
              "end": "2026-03-31",
              "val": 2550800000,
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              "fy": 2026,
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            {
              "end": "2026-06-30",
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              "fy": 2026,
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              "filed": "2026-07-24",
              "frame": "CY2026Q2I"
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      },
      "FixturesAndEquipmentGross": {
        "label": "Fixtures and Equipment, Gross",
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            {
              "end": "2010-12-31",
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              "frame": "CY2010Q4I"
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          ]
        }
      },
      "FutureAmortizationExpenseAfterYearFive": {
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            {
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-09"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 2146300000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 2037300000,
              "accn": "0001156375-12-000044",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-08",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": 1895600000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 1902900000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08"
            }
          ]
        }
      },
      "FutureAmortizationExpenseRemainderOfFiscalYear": {
        "label": "Future Amortization Expense, Remainder of Fiscal Year (Deprecated 2012-01-31)",
        "description": "The amount of amortization expense expected to be recognized during the remainder of the current fiscal year.",
        "units": {
          "USD": [
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": 65800000,
              "accn": "0001193125-11-212308",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-05"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": 32900000,
              "accn": "0001193125-11-304112",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-09"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 93600000,
              "accn": "0001156375-12-000044",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-08",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": 51200000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 25800000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08"
            }
          ]
        }
      },
      "FutureAmortizationExpenseYearFive": {
        "label": "Future Amortization Expense, Year Five (Deprecated 2012-01-31)",
        "description": "The amount of amortization expense expected to be recognized during year five of the five succeeding fiscal years.",
        "units": {
          "USD": [
            {
              "start": "2010-01-01",
              "end": "2010-06-30",
              "val": 111000000,
              "accn": "0001193125-10-181102",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-08-06"
            },
            {
              "start": "2010-01-01",
              "end": "2010-09-30",
              "val": 111000000,
              "accn": "0001193125-10-250139",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-11-05"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 114400000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": 109000000,
              "accn": "0001193125-11-134231",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-05-10",
              "frame": "CY2011Q1"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": 109300000,
              "accn": "0001193125-11-212308",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-05"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": 109200000,
              "accn": "0001193125-11-304112",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-09"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 109300000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 109100000,
              "accn": "0001156375-12-000044",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-08",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": 96000000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 97300000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08"
            }
          ]
        }
      },
      "FutureAmortizationExpenseYearFour": {
        "label": "Future Amortization Expense, Year Four (Deprecated 2012-01-31)",
        "description": "The amount of amortization expense expected to be recognized during year four of the five succeeding fiscal years.",
        "units": {
          "USD": [
            {
              "start": "2010-01-01",
              "end": "2010-06-30",
              "val": 116200000,
              "accn": "0001193125-10-181102",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-08-06"
            },
            {
              "start": "2010-01-01",
              "end": "2010-09-30",
              "val": 114700000,
              "accn": "0001193125-10-250139",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-11-05"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 118300000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": 114400000,
              "accn": "0001193125-11-134231",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-05-10",
              "frame": "CY2011Q1"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": 114700000,
              "accn": "0001193125-11-212308",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-05"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": 114600000,
              "accn": "0001193125-11-304112",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-09"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 114600000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 109300000,
              "accn": "0001156375-12-000044",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-08",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": 96000000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 97900000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08"
            }
          ]
        }
      },
      "FutureAmortizationExpenseYearOne": {
        "label": "Future Amortization Expense, Year One (Deprecated 2012-01-31)",
        "description": "The amount of amortization expense expected to be recognized during year one of the five succeeding fiscal years.",
        "units": {
          "USD": [
            {
              "start": "2010-01-01",
              "end": "2010-06-30",
              "val": 129200000,
              "accn": "0001193125-10-181102",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-08-06"
            },
            {
              "start": "2010-01-01",
              "end": "2010-09-30",
              "val": 128100000,
              "accn": "0001193125-10-250139",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-11-05"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 131700000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": 126200000,
              "accn": "0001193125-11-134231",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-05-10",
              "frame": "CY2011Q1"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": 126400000,
              "accn": "0001193125-11-212308",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-05"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": 126400000,
              "accn": "0001193125-11-304112",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-09"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 126300000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 120200000,
              "accn": "0001156375-12-000044",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-08",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": 100900000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 102800000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08"
            }
          ]
        }
      },
      "FutureAmortizationExpenseYearThree": {
        "label": "Future Amortization Expense, Year Three (Deprecated 2012-01-31)",
        "description": "The amount of amortization expense expected to be recognized during year three of the five succeeding fiscal years.",
        "units": {
          "USD": [
            {
              "start": "2010-01-01",
              "end": "2010-06-30",
              "val": 117900000,
              "accn": "0001193125-10-181102",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-08-06"
            },
            {
              "start": "2010-01-01",
              "end": "2010-09-30",
              "val": 116300000,
              "accn": "0001193125-10-250139",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-11-05"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 120000000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": 118300000,
              "accn": "0001193125-11-134231",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-05-10",
              "frame": "CY2011Q1"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": 118600000,
              "accn": "0001193125-11-212308",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-05"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": 118600000,
              "accn": "0001193125-11-304112",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-09"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 118500000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 114600000,
              "accn": "0001156375-12-000044",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-08",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": 99400000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 101300000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08"
            }
          ]
        }
      },
      "FutureAmortizationExpenseYearTwo": {
        "label": "Future Amortization Expense, Year Two (Deprecated 2012-01-31)",
        "description": "The amount of amortization expense expected to be recognized during year two of the five succeeding fiscal years.",
        "units": {
          "USD": [
            {
              "start": "2010-01-01",
              "end": "2010-06-30",
              "val": 123900000,
              "accn": "0001193125-10-181102",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-08-06"
            },
            {
              "start": "2010-01-01",
              "end": "2010-09-30",
              "val": 122500000,
              "accn": "0001193125-10-250139",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-11-05"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 126100000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": 120000000,
              "accn": "0001193125-11-134231",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-05-10",
              "frame": "CY2011Q1"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": 120300000,
              "accn": "0001193125-11-212308",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-05"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": 120200000,
              "accn": "0001193125-11-304112",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-09"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 120200000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 118600000,
              "accn": "0001156375-12-000044",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-08",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": 99600000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 101500000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08"
            }
          ]
        }
      },
      "GainLossOnDerivativeInstrumentsNetPretax": {
        "label": "Gain (Loss) on Derivative Instruments, Net, Pretax",
        "description": "Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.",
        "units": {
          "USD": [
            {
              "start": "2007-01-01",
              "end": "2007-12-31",
              "val": -100000,
              "accn": "0001193125-10-043180",
              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26",
              "frame": "CY2007"
            },
            {
              "start": "2008-01-01",
              "end": "2008-06-30",
              "val": -15200000,
              "accn": "0001193125-09-187481",
              "fy": 2009,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2009-09-04"
            },
            {
              "start": "2008-04-01",
              "end": "2008-06-30",
              "val": -13000000,
              "accn": "0001193125-09-187481",
              "fy": 2009,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2009-09-04",
              "frame": "CY2008Q2"
            },
            {
              "start": "2008-01-01",
              "end": "2008-09-30",
              "val": -7800000,
              "accn": "0001193125-09-227674",
              "fy": 2009,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2009-11-06"
            },
            {
              "start": "2008-07-01",
              "end": "2008-09-30",
              "val": 7400000,
              "accn": "0001193125-09-227674",
              "fy": 2009,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2009-11-06",
              "frame": "CY2008Q3"
            },
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": -8100000,
              "accn": "0001193125-10-043180",
              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26"
            },
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": -8100000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
              "end": "2009-06-30",
              "val": 0,
              "accn": "0001193125-09-187481",
              "fy": 2009,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2009-09-04"
            },
            {
              "start": "2009-04-01",
              "end": "2009-06-30",
              "val": 0,
              "accn": "0001193125-09-187481",
              "fy": 2009,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2009-09-04",
              "frame": "CY2009Q2"
            },
            {
              "start": "2009-01-01",
              "end": "2009-09-30",
              "val": 0,
              "accn": "0001193125-09-227674",
              "fy": 2009,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2009-11-06"
            },
            {
              "start": "2009-07-01",
              "end": "2009-09-30",
              "val": 0,
              "accn": "0001193125-09-227674",
              "fy": 2009,
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              "end": "2014-09-30",
              "val": 0,
              "accn": "0001156375-15-000108",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-11-06"
            },
            {
              "start": "2015-01-01",
              "end": "2015-06-30",
              "val": 5900000,
              "accn": "0001156375-15-000067",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-08-05"
            },
            {
              "start": "2015-01-01",
              "end": "2015-06-30",
              "val": 5900000,
              "accn": "0001156375-16-000195",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-08-04"
            },
            {
              "start": "2015-01-01",
              "end": "2015-09-30",
              "val": 3400000,
              "accn": "0001156375-15-000108",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-11-06"
            },
            {
              "start": "2015-01-01",
              "end": "2015-09-30",
              "val": 3400000,
              "accn": "0001156375-16-000255",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-11-04"
            },
            {
              "start": "2016-01-01",
              "end": "2016-03-31",
              "val": 0,
              "accn": "0001156375-17-000045",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-04",
              "frame": "CY2016Q1"
            },
            {
              "start": "2016-01-01",
              "end": "2016-06-30",
              "val": 0,
              "accn": "0001156375-16-000195",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-08-04"
            },
            {
              "start": "2016-01-01",
              "end": "2016-06-30",
              "val": 0,
              "accn": "0001156375-17-000080",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-08-02"
            },
            {
              "start": "2016-01-01",
              "end": "2016-09-30",
              "val": 6400000,
              "accn": "0001156375-16-000255",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-11-04"
            },
            {
              "start": "2016-01-01",
              "end": "2016-09-30",
              "val": 6400000,
              "accn": "0001156375-17-000108",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-11-02"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 48400000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-03-31",
              "val": 86500000,
              "accn": "0001156375-17-000045",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-04"
            },
            {
              "start": "2017-01-01",
              "end": "2017-03-31",
              "val": 86500000,
              "accn": "0001156375-18-000047",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-05-03",
              "frame": "CY2017Q1"
            },
            {
              "start": "2017-01-01",
              "end": "2017-06-30",
              "val": 86500000,
              "accn": "0001156375-17-000080",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-08-02"
            },
            {
              "start": "2017-01-01",
              "end": "2017-06-30",
              "val": 86500000,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01"
            },
            {
              "start": "2017-01-01",
              "end": "2017-09-30",
              "val": 86500000,
              "accn": "0001156375-17-000108",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-11-02"
            },
            {
              "start": "2017-01-01",
              "end": "2017-09-30",
              "val": 86500000,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02"
            },
            {
              "start": "2018-01-01",
              "end": "2018-03-31",
              "val": 0,
              "accn": "0001156375-18-000047",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-05-03",
              "frame": "CY2018Q1"
            },
            {
              "start": "2018-01-01",
              "end": "2018-06-30",
              "val": 0,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": 0,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02"
            }
          ]
        }
      },
      "GainLossOnSaleOfOtherAssets": {
        "label": "Gain (Loss) on Disposition of Other Assets",
        "description": "Amount of gain (loss) on sale or disposal of other assets.",
        "units": {
          "USD": [
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 0,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 0,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2010"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 0,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": 9800000,
              "accn": "0001193125-11-212308",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-05"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": 9800000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": 9800000,
              "accn": "0001193125-11-304112",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-09"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": 9800000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 9800000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2011"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 9800000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 9800000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28"
            },
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": 0,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08"
            },
            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": 20300000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08",
              "frame": "CY2012Q2"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 0,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2012"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013"
            }
          ]
        }
      },
      "GainLossOnSaleOfOtherInvestments": {
        "label": "Gain (Loss) on Sale of Other Investments",
        "description": "Amount of gain (loss) included in earnings for investments classified as other.",
        "units": {
          "USD": [
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 0,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-09-30",
              "val": 0,
              "accn": "0001156375-17-000108",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-11-02"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 0,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 0,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-09-30",
              "val": 2000000,
              "accn": "0001156375-17-000108",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-11-02"
            },
            {
              "start": "2017-01-01",
              "end": "2017-09-30",
              "val": 2000000,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 2300000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 2300000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": 0,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 0,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018"
            }
          ]
        }
      },
      "GainLossOnSaleOfPropertyPlantEquipment": {
        "label": "Gain (Loss) on Disposition of Property Plant Equipment",
        "description": "Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.",
        "units": {
          "USD": [
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 0,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": -27100000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": -27100000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": -27100000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 0,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 0,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 0,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2015"
            }
          ]
        }
      },
      "GainLossOnSaleOfSecuritiesNet": {
        "label": "Gain (Loss) on Sale of Securities, Net (Deprecated 2018-01-31)",
        "description": "The net gain (loss) realized from the sale, exchange, redemption, or retirement of securities, not separately or otherwise categorized as trading, available-for-sale, or held-to-maturity.",
        "units": {
          "USD": [
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 0,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 0,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": -8500000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": -8500000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": -8500000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 48400000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 48400000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 86500000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017"
            }
          ]
        }
      },
      "GainLossRelatedToLitigationSettlement": {
        "label": "Gain (Loss) Related to Litigation Settlement",
        "description": "Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process.",
        "units": {
          "USD": [
            {
              "start": "2010-03-01",
              "end": "2010-03-31",
              "val": 6000000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            }
          ]
        }
      },
      "GainOnSaleOfInvestments": {
        "label": "Gain on Sale of Investments",
        "description": "The difference between the carrying value and the sale price of an investment. A gain would be recognized when the sale price of the investment is greater than the carrying value of the investment. This element refers to the Gain included in earnings and not to the cash proceeds of the sale.",
        "units": {
          "USD": [
            {
              "start": "2016-01-01",
              "end": "2016-09-30",
              "val": 6400000,
              "accn": "0001156375-16-000255",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-11-04"
            },
            {
              "start": "2017-01-01",
              "end": "2017-03-31",
              "val": 86500000,
              "accn": "0001156375-17-000045",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-04",
              "frame": "CY2017Q1"
            },
            {
              "start": "2017-01-01",
              "end": "2017-06-30",
              "val": 86500000,
              "accn": "0001156375-17-000080",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-08-02"
            }
          ]
        }
      },
      "GainsLossesOnExtinguishmentOfDebt": {
        "label": "Gain (Loss) on Extinguishment of Debt",
        "description": "Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.",
        "units": {
          "USD": [
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-06-30",
              "val": 0,
              "accn": "0001156375-15-000067",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-08-05"
            },
            {
              "start": "2014-01-01",
              "end": "2014-09-30",
              "val": 0,
              "accn": "0001156375-15-000108",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-11-06"
            },
            {
              "start": "2014-01-01",
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        "label": "Goodwill, Written off Related to Sale of Business Unit",
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      },
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        "label": "Other than Temporary Impairment Losses, Investments",
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              "accn": "0001156375-13-000007",
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              "filed": "2013-03-01",
              "frame": "CY2012"
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            {
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              "val": 3800000,
              "accn": "0001156375-16-000195",
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              "form": "10-Q",
              "filed": "2016-08-04"
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            {
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              "val": 5500000,
              "accn": "0001156375-16-000255",
              "fy": 2016,
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            {
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              "form": "10-Q",
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            {
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              "fy": 2018,
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              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018"
            },
            {
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              "end": "2019-03-31",
              "val": 3400000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1"
            },
            {
              "start": "2019-01-01",
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              "val": 18700000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-08-07"
            },
            {
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            {
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              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019"
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          ]
        }
      },
      "ImpairmentOfRealEstate": {
        "label": "Impairment of Real Estate",
        "description": "The charge against earnings in the period to reduce the carrying amount of real property to fair value.",
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              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-24"
            },
            {
              "start": "2026-04-01",
              "end": "2026-06-30",
              "val": 233500000,
              "accn": "0001156375-26-000047",
              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-24",
              "frame": "CY2026Q2"
            }
          ]
        }
      },
      "Land": {
        "label": "Land",
        "description": "Amount before accumulated depletion of real estate held for productive use, excluding land held for sale.",
        "units": {
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            {
              "end": "2009-12-31",
              "val": 59100000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 65200000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "LeaseAndRentalExpense": {
        "label": "Operating Leases, Rent Expense",
        "description": "Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.",
        "units": {
          "USD": [
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": 36200000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 33700000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 33700000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 35500000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 35500000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 35500000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 41000000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 41000000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 41000000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 46100000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 46100000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 25300000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 50500000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 28600000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 28600000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 51000000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 51000000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 51000000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 54800000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 54800000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 54800000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 47900000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 47900000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 47900000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 41700000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 41700000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 48100000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018"
            }
          ]
        }
      },
      "LeaseholdImprovementsGross": {
        "label": "Leasehold Improvements, Gross",
        "description": "Amount before accumulated depreciation of additions or improvements to assets held under a lease arrangement.",
        "units": {
          "USD": [
            {
              "end": "2009-12-31",
              "val": 198800000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 201900000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "LesseeFinanceLeaseDiscountRate": {
        "label": "Lessee, Finance Lease, Discount Rate",
        "description": "Discount rate used by lessee to determine present value of finance lease payments.",
        "units": {
          "pure": [
            {
              "end": "2019-03-31",
              "val": 0.0351,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            }
          ]
        }
      },
      "LesseeOperatingLeaseLiabilityPaymentsDue": {
        "label": "Lessee, Operating Lease, Liability, to be Paid",
        "description": "Amount of lessee's undiscounted obligation for lease payment for operating lease.",
        "units": {
          "USD": [
            {
              "end": "2021-09-30",
              "val": 633100000,
              "accn": "0001156375-21-000167",
              "fy": 2021,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-11-03",
              "frame": "CY2021Q3I"
            },
            {
              "end": "2021-12-31",
              "val": 613600000,
              "accn": "0001156375-22-000076",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-25",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-03-31",
              "val": 592300000,
              "accn": "0001156375-22-000158",
              "fy": 2022,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2022-05-04",
              "frame": "CY2022Q1I"
            },
            {
              "end": "2022-06-30",
              "val": 562500000,
              "accn": "0001156375-22-000215",
              "fy": 2022,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2022-08-03",
              "frame": "CY2022Q2I"
            },
            {
              "end": "2022-09-30",
              "val": 542900000,
              "accn": "0001156375-22-000312",
              "fy": 2022,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2022-11-02",
              "frame": "CY2022Q3I"
            },
            {
              "end": "2023-03-31",
              "val": 519600000,
              "accn": "0001156375-23-000066",
              "fy": 2023,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2023-05-03",
              "frame": "CY2023Q1I"
            },
            {
              "end": "2023-06-30",
              "val": 498000000,
              "accn": "0001156375-23-000129",
              "fy": 2023,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2023-08-02",
              "frame": "CY2023Q2I"
            },
            {
              "end": "2023-09-30",
              "val": 480200000,
              "accn": "0001156375-23-000190",
              "fy": 2023,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2023-11-01",
              "frame": "CY2023Q3I"
            },
            {
              "end": "2024-03-31",
              "val": 449600000,
              "accn": "0001156375-24-000072",
              "fy": 2024,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2024-05-01",
              "frame": "CY2024Q1I"
            },
            {
              "end": "2024-06-30",
              "val": 428400000,
              "accn": "0001156375-24-000149",
              "fy": 2024,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2024-08-05",
              "frame": "CY2024Q2I"
            },
            {
              "end": "2024-09-30",
              "val": 414800000,
              "accn": "0001156375-24-000200",
              "fy": 2024,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2024-11-08",
              "frame": "CY2024Q3I"
            },
            {
              "end": "2025-03-31",
              "val": 379000000,
              "accn": "0001156375-25-000103",
              "fy": 2025,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2025-04-30",
              "frame": "CY2025Q1I"
            },
            {
              "end": "2025-06-30",
              "val": 343400000,
              "accn": "0001156375-25-000182",
              "fy": 2025,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2025-07-25",
              "frame": "CY2025Q2I"
            },
            {
              "end": "2025-09-30",
              "val": 342100000,
              "accn": "0001156375-25-000206",
              "fy": 2025,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2025-10-24",
              "frame": "CY2025Q3I"
            },
            {
              "end": "2026-03-31",
              "val": 311800000,
              "accn": "0001156375-26-000020",
              "fy": 2026,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2026-04-24",
              "frame": "CY2026Q1I"
            },
            {
              "end": "2026-06-30",
              "val": 475900000,
              "accn": "0001156375-26-000047",
              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-24",
              "frame": "CY2026Q2I"
            }
          ]
        }
      },
      "LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive": {
        "label": "Lessee, Operating Lease, Liability, to be Paid, after Year Five",
        "description": "Amount of lessee's undiscounted obligation for lease payment for operating lease due after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
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              "end": "2021-09-30",
              "val": 307200000,
              "accn": "0001156375-21-000167",
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-11-03",
              "frame": "CY2021Q3I"
            },
            {
              "end": "2021-12-31",
              "val": 306400000,
              "accn": "0001156375-22-000076",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-25",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-03-31",
              "val": 252100000,
              "accn": "0001156375-22-000158",
              "fy": 2022,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2022-05-04",
              "frame": "CY2022Q1I"
            },
            {
              "end": "2022-06-30",
              "val": 243900000,
              "accn": "0001156375-22-000215",
              "fy": 2022,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2022-08-03",
              "frame": "CY2022Q2I"
            },
            {
              "end": "2022-09-30",
              "val": 240400000,
              "accn": "0001156375-22-000312",
              "fy": 2022,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2022-11-02",
              "frame": "CY2022Q3I"
            },
            {
              "end": "2022-12-31",
              "val": 239200000,
              "accn": "0001156375-23-000020",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-27",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-03-31",
              "val": 197000000,
              "accn": "0001156375-23-000066",
              "fy": 2023,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2023-05-03",
              "frame": "CY2023Q1I"
            },
            {
              "end": "2023-06-30",
              "val": 193900000,
              "accn": "0001156375-23-000129",
              "fy": 2023,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2023-08-02",
              "frame": "CY2023Q2I"
            },
            {
              "end": "2023-09-30",
              "val": 193000000,
              "accn": "0001156375-23-000190",
              "fy": 2023,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2023-11-01",
              "frame": "CY2023Q3I"
            },
            {
              "end": "2023-12-31",
              "val": 192500000,
              "accn": "0001156375-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-28",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-03-31",
              "val": 156200000,
              "accn": "0001156375-24-000072",
              "fy": 2024,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2024-05-01",
              "frame": "CY2024Q1I"
            },
            {
              "end": "2024-06-30",
              "val": 153100000,
              "accn": "0001156375-24-000149",
              "fy": 2024,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2024-08-05",
              "frame": "CY2024Q2I"
            },
            {
              "end": "2024-09-30",
              "val": 154200000,
              "accn": "0001156375-24-000200",
              "fy": 2024,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2024-11-08",
              "frame": "CY2024Q3I"
            },
            {
              "end": "2024-12-31",
              "val": 153700000,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-03-31",
              "val": 118200000,
              "accn": "0001156375-25-000103",
              "fy": 2025,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2025-04-30",
              "frame": "CY2025Q1I"
            },
            {
              "end": "2025-06-30",
              "val": 110600000,
              "accn": "0001156375-25-000182",
              "fy": 2025,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2025-07-25",
              "frame": "CY2025Q2I"
            },
            {
              "end": "2025-09-30",
              "val": 111300000,
              "accn": "0001156375-25-000206",
              "fy": 2025,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2025-10-24",
              "frame": "CY2025Q3I"
            },
            {
              "end": "2025-12-31",
              "val": 111400000,
              "accn": "0001156375-26-000009",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-26",
              "frame": "CY2025Q4I"
            },
            {
              "end": "2026-03-31",
              "val": 80000000,
              "accn": "0001156375-26-000020",
              "fy": 2026,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2026-04-24",
              "frame": "CY2026Q1I"
            },
            {
              "end": "2026-06-30",
              "val": 163600000,
              "accn": "0001156375-26-000047",
              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-24",
              "frame": "CY2026Q2I"
            }
          ]
        }
      },
      "LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths": {
        "label": "Lessee, Operating Lease, Liability, to be Paid, Year One",
        "description": "Amount of lessee's undiscounted obligation for lease payment for operating lease to be paid in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
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              "end": "2021-09-30",
              "val": 67300000,
              "accn": "0001156375-21-000167",
              "fy": 2021,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-11-03",
              "frame": "CY2021Q3I"
            },
            {
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            {
              "start": "2014-04-01",
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              "val": 25700000,
              "accn": "0001156375-15-000067",
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            {
              "start": "2014-01-01",
              "end": "2014-09-30",
              "val": 80200000,
              "accn": "0001156375-14-000132",
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            {
              "start": "2014-01-01",
              "end": "2014-09-30",
              "val": 80200000,
              "accn": "0001156375-15-000108",
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              "val": 25500000,
              "accn": "0001156375-14-000132",
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              "val": 25500000,
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            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 114200000,
              "accn": "0001156375-15-000014",
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              "filed": "2015-02-26"
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            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 114200000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
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              "filed": "2016-02-26"
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              "end": "2014-12-31",
              "val": 114200000,
              "accn": "0001156375-17-000016",
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              "frame": "CY2014"
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              "val": 30600000,
              "accn": "0001156375-15-000046",
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              "end": "2015-06-30",
              "val": 59400000,
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      },
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        "label": "Line of Credit Facility, Commitment Fee Amount",
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              "accn": "0001156375-25-000103",
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              "form": "10-Q",
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          ]
        }
      },
      "LineOfCreditFacilityIncreaseAdditionalBorrowings": {
        "label": "Line of Credit Facility, Increase, Additional Borrowings (Deprecated 2013-01-31)",
        "description": "Increase for additional borrowings on the credit facility during the period.",
        "units": {
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      },
      "LineOfCreditFacilityMaximumBorrowingCapacity": {
        "label": "Line of Credit Facility, Maximum Borrowing Capacity",
        "description": "Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.",
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          ]
        }
      },
      "LinesOfCreditCurrent": {
        "label": "Line of Credit, Current",
        "description": "The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.",
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            {
              "end": "2011-12-31",
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              "end": "2012-12-31",
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              "filed": "2013-03-01",
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              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
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            {
              "end": "2025-12-31",
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          ]
        }
      },
      "LitigationReserve": {
        "label": "Estimated Litigation Liability",
        "description": "Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs.",
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      "LoansAndLeasesReceivableRelatedPartiesAdditions": {
        "label": "Loans and Leases Receivable, Related Parties, Additions",
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              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 454600000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 409300000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 603100000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 738200000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 974400000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-03-31",
              "val": 725300000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 729200000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 711000000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 704100000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-03-31",
              "val": 687700000,
              "accn": "0001156375-20-000039",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-05-06",
              "frame": "CY2020Q1I"
            },
            {
              "end": "2020-06-30",
              "val": 672100000,
              "accn": "0001156375-20-000079",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-08-05",
              "frame": "CY2020Q2I"
            },
            {
              "end": "2020-09-30",
              "val": 672300000,
              "accn": "0001156375-20-000119",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-11-04",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2020-12-31",
              "val": 658500000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-03-31",
              "val": 668900000,
              "accn": "0001156375-21-000052",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2021-05-05",
              "frame": "CY2021Q1I"
            },
            {
              "end": "2021-06-30",
              "val": 650000000,
              "accn": "0001156375-21-000093",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2021-08-05",
              "frame": "CY2021Q2I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueCurrent": {
        "label": "Operating Leases, Future Minimum Payments Due, Next Twelve Months",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 22100000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 28700000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 53000000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 59100000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 50200000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 59000000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 64300000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 82500000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-03-31",
              "val": 60600000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 63300000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 63300000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 63800000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-03-31",
              "val": 61200000,
              "accn": "0001156375-20-000039",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-05-06",
              "frame": "CY2020Q1I"
            },
            {
              "end": "2020-06-30",
              "val": 61400000,
              "accn": "0001156375-20-000079",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-08-05",
              "frame": "CY2020Q2I"
            },
            {
              "end": "2020-09-30",
              "val": 63600000,
              "accn": "0001156375-20-000119",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-11-04",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2020-12-31",
              "val": 63900000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-03-31",
              "val": 69700000,
              "accn": "0001156375-21-000052",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2021-05-05",
              "frame": "CY2021Q1I"
            },
            {
              "end": "2021-06-30",
              "val": 67300000,
              "accn": "0001156375-21-000093",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2021-08-05",
              "frame": "CY2021Q2I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueInFiveYears": {
        "label": "Operating Leases, Future Minimum Payments, Due in Five Years",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 22800000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 29300000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 41600000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 41600000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 42100000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 55200000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 56500000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 76000000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-03-31",
              "val": 51800000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 53400000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 53300000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 55100000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-03-31",
              "val": 53500000,
              "accn": "0001156375-20-000039",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-05-06",
              "frame": "CY2020Q1I"
            },
            {
              "end": "2020-06-30",
              "val": 53800000,
              "accn": "0001156375-20-000079",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-08-05",
              "frame": "CY2020Q2I"
            },
            {
              "end": "2020-09-30",
              "val": 56600000,
              "accn": "0001156375-20-000119",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-11-04",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2020-12-31",
              "val": 56800000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-03-31",
              "val": 54300000,
              "accn": "0001156375-21-000052",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2021-05-05",
              "frame": "CY2021Q1I"
            },
            {
              "end": "2021-06-30",
              "val": 54400000,
              "accn": "0001156375-21-000093",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2021-08-05",
              "frame": "CY2021Q2I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueInFourYears": {
        "label": "Operating Leases, Future Minimum Payments, Due in Four Years",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 22700000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 28900000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 42300000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 42000000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 44800000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 60000000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 56800000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 78700000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-03-31",
              "val": 57300000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 59000000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 58900000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 60700000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-03-31",
              "val": 55100000,
              "accn": "0001156375-20-000039",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-05-06",
              "frame": "CY2020Q1I"
            },
            {
              "end": "2020-06-30",
              "val": 55700000,
              "accn": "0001156375-20-000079",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-08-05",
              "frame": "CY2020Q2I"
            },
            {
              "end": "2020-09-30",
              "val": 59200000,
              "accn": "0001156375-20-000119",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-11-04",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2020-12-31",
              "val": 59400000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-03-31",
              "val": 58800000,
              "accn": "0001156375-21-000052",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2021-05-05",
              "frame": "CY2021Q1I"
            },
            {
              "end": "2021-06-30",
              "val": 58800000,
              "accn": "0001156375-21-000093",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2021-08-05",
              "frame": "CY2021Q2I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueInThreeYears": {
        "label": "Operating Leases, Future Minimum Payments, Due in Three Years",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 25100000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 28900000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 42000000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 42400000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 45100000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 60000000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 61600000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 74400000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-03-31",
              "val": 60600000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 62900000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 62800000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 64400000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-03-31",
              "val": 60500000,
              "accn": "0001156375-20-000039",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-05-06",
              "frame": "CY2020Q1I"
            },
            {
              "end": "2020-06-30",
              "val": 61300000,
              "accn": "0001156375-20-000079",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-08-05",
              "frame": "CY2020Q2I"
            },
            {
              "end": "2020-09-30",
              "val": 65100000,
              "accn": "0001156375-20-000119",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-11-04",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2020-12-31",
              "val": 65400000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-03-31",
              "val": 61700000,
              "accn": "0001156375-21-000052",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2021-05-05",
              "frame": "CY2021Q1I"
            },
            {
              "end": "2021-06-30",
              "val": 61800000,
              "accn": "0001156375-21-000093",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2021-08-05",
              "frame": "CY2021Q2I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueInTwoYears": {
        "label": "Operating Leases, Future Minimum Payments, Due in Two Years",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 25800000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 29100000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 53600000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 47800000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 44300000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 59300000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 63800000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 76600000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-03-31",
              "val": 57100000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 60100000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 59800000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 61400000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-03-31",
              "val": 64200000,
              "accn": "0001156375-20-000039",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-05-06",
              "frame": "CY2020Q1I"
            },
            {
              "end": "2020-06-30",
              "val": 64400000,
              "accn": "0001156375-20-000079",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-08-05",
              "frame": "CY2020Q2I"
            },
            {
              "end": "2020-09-30",
              "val": 66900000,
              "accn": "0001156375-20-000119",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-11-04",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2020-12-31",
              "val": 67000000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-03-31",
              "val": 68000000,
              "accn": "0001156375-21-000052",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2021-05-05",
              "frame": "CY2021Q1I"
            },
            {
              "end": "2021-06-30",
              "val": 66800000,
              "accn": "0001156375-21-000093",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2021-08-05",
              "frame": "CY2021Q2I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueThereafter": {
        "label": "Operating Leases, Future Minimum Payments, Due Thereafter",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 135600000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 152900000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 263100000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 221700000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 182800000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 309600000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 435200000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 586200000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-03-31",
              "val": 392200000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 399000000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 397000000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 398700000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-03-31",
              "val": 345300000,
              "accn": "0001156375-20-000039",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-05-06",
              "frame": "CY2020Q1I"
            },
            {
              "end": "2020-06-30",
              "val": 343400000,
              "accn": "0001156375-20-000079",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-08-05",
              "frame": "CY2020Q2I"
            },
            {
              "end": "2020-09-30",
              "val": 344700000,
              "accn": "0001156375-20-000119",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-11-04",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2020-12-31",
              "val": 346000000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-03-31",
              "val": 306700000,
              "accn": "0001156375-21-000052",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2021-05-05",
              "frame": "CY2021Q1I"
            },
            {
              "end": "2021-06-30",
              "val": 307500000,
              "accn": "0001156375-21-000093",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2021-08-05",
              "frame": "CY2021Q2I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsReceivableCurrent": {
        "label": "Operating Leases, Future Minimum Payments Receivable, Current",
        "description": "Future rental payments receivable within one year of the balance sheet date under an operating lease.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 31800000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 28600000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears": {
        "label": "Operating Leases, Future Minimum Payments Receivable, in Five Years",
        "description": "Future rental payments receivable within the fifth year from the balance sheet date under an operating lease.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 12000000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 6600000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsReceivableInFourYears": {
        "label": "Operating Leases, Future Minimum Payments Receivable, in Four Years",
        "description": "Future rental payments receivable within the fourth year from the balance sheet date under an operating lease.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 14900000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 10300000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears": {
        "label": "Operating Leases, Future Minimum Payments Receivable, in Three Years",
        "description": "Future rental payments receivable within the third year from the balance sheet date under an operating lease.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 20500000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 13900000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears": {
        "label": "Operating Leases, Future Minimum Payments Receivable, in Two Years",
        "description": "Future rental payments receivable within the second year from the balance sheet date under an operating lease.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 27400000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 21300000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsRemainderOfFiscalYear": {
        "label": "Operating Leases, Future Minimum Payments, Remainder of Fiscal Year",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2019-03-31",
              "val": 45700000,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 31500000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 15900000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2020-03-31",
              "val": 47900000,
              "accn": "0001156375-20-000039",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-05-06",
              "frame": "CY2020Q1I"
            },
            {
              "end": "2020-06-30",
              "val": 32100000,
              "accn": "0001156375-20-000079",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-08-05",
              "frame": "CY2020Q2I"
            },
            {
              "end": "2020-09-30",
              "val": 16200000,
              "accn": "0001156375-20-000119",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-11-04",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2021-03-31",
              "val": 49700000,
              "accn": "0001156375-21-000052",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2021-05-05",
              "frame": "CY2021Q1I"
            },
            {
              "end": "2021-06-30",
              "val": 33400000,
              "accn": "0001156375-21-000093",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2021-08-05",
              "frame": "CY2021Q2I"
            }
          ]
        }
      },
      "OperatingLeaseWeightedAverageDiscountRatePercent": {
        "label": "Operating Lease, Weighted Average Discount Rate, Percent",
        "description": "Weighted average discount rate for operating lease calculated at point in time.",
        "units": {
          "pure": [
            {
              "end": "2019-12-31",
              "val": 0.04,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28"
            },
            {
              "end": "2019-12-31",
              "val": 0.04,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 0.039,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26"
            },
            {
              "end": "2020-12-31",
              "val": 0.039,
              "accn": "0001156375-22-000076",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-25",
              "frame": "CY2020Q4I"
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            {
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        "label": "Other Commitment",
        "description": "Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.",
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      },
      "OtherCommitmentDueAfterFifthYear": {
        "label": "Other Commitment, to be Paid, after Year Five",
        "description": "Amount of commitment classified as other to be paid after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
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        "label": "Other Commitment, to be Paid, Year Five",
        "description": "Amount of commitment classified as other to be paid in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
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      "OtherCommitmentDueInFourthYear": {
        "label": "Other Commitment, to be Paid, Year Four",
        "description": "Amount of commitment classified as other to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
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        "label": "Other Commitment, to be Paid, Year Two",
        "description": "Amount of commitment classified as other to be paid in second fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
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      "OtherCommitmentDueInThirdYear": {
        "label": "Other Commitment, to be Paid, Year Three",
        "description": "Amount of commitment classified as other to be paid in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
          "USD": [
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              "end": "2016-03-31",
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      },
      "OtherCommitmentsFutureMinimumPaymentsRemainderOfFiscalYear": {
        "label": "Other Commitment, to be Paid, Remainder of Fiscal Year",
        "description": "Amount of commitment classified as other to be paid in remainder of current fiscal year.",
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            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": -25100000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 84400000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08"
            }
          ]
        }
      },
      "OtherComprehensiveIncomeAvailableForSaleSecuritiesAdjustmentNetOfTaxPeriodIncreaseDecrease": {
        "label": "Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax (Deprecated 2012-01-31)",
        "description": "Gross appreciation or the gross loss in value of the total unsold securities. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.",
        "units": {
          "USD": [
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": -25300000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 11800000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 6000000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010"
            }
          ]
        }
      },
      "OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentBeforeTaxPeriodIncreaseDecrease": {
        "label": "Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax (Deprecated 2012-01-31)",
        "description": "Amounts recognized in other comprehensive income (but not yet recognized in net periodic benefit cost), including the net gain (loss) and net prior service cost (credit) arising during the period. Also includes reclassification adjustments out of other comprehensive income as a result of being recognized as components of net periodic benefit cost for the period. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.",
        "units": {
          "USD": [
            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": -2800000,
              "accn": "0001156375-12-000044",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-08",
              "frame": "CY2011Q1"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": -3400000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08"
            },
            {
              "start": "2011-04-01",
              "end": "2011-06-30",
              "val": 0,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08",
              "frame": "CY2011Q2"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": -3400000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08"
            },
            {
              "start": "2011-07-01",
              "end": "2011-09-30",
              "val": 0,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08",
              "frame": "CY2011Q3"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 500000,
              "accn": "0001156375-12-000044",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-08",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": 500000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08"
            },
            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": 0,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08",
              "frame": "CY2012Q2"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 500000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08"
            },
            {
              "start": "2012-07-01",
              "end": "2012-09-30",
              "val": 0,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08",
              "frame": "CY2012Q3"
            }
          ]
        }
      },
      "OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease": {
        "label": "Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax (Deprecated 2012-01-31)",
        "description": "The increase (decrease) in accumulated comprehensive income during the period related to pension and other postretirement benefit plans, after tax. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.",
        "units": {
          "USD": [
            {
              "start": "2007-01-01",
              "end": "2007-12-31",
              "val": -2400000,
              "accn": "0001193125-10-043180",
              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26",
              "frame": "CY2007"
            },
            {
              "start": "2008-01-01",
              "end": "2008-06-30",
              "val": 300000,
              "accn": "0001193125-09-187481",
              "fy": 2009,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2009-09-04"
            },
            {
              "start": "2008-01-01",
              "end": "2008-09-30",
              "val": 400000,
              "accn": "0001193125-09-227674",
              "fy": 2009,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2009-11-06"
            },
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": -15400000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2008"
            },
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": -15400000,
              "accn": "0001193125-10-043180",
              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26"
            },
            {
              "start": "2009-01-01",
              "end": "2009-03-31",
              "val": -1300000,
              "accn": "0001193125-10-112933",
              "fy": 2010,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2010-05-07",
              "frame": "CY2009Q1"
            },
            {
              "start": "2009-01-01",
              "end": "2009-06-30",
              "val": -1300000,
              "accn": "0001193125-10-181102",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-08-06"
            },
            {
              "start": "2009-01-01",
              "end": "2009-06-30",
              "val": -1300000,
              "accn": "0001193125-09-187481",
              "fy": 2009,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2009-09-04"
            },
            {
              "start": "2009-01-01",
              "end": "2009-09-30",
              "val": -1400000,
              "accn": "0001193125-10-250139",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-11-05"
            },
            {
              "start": "2009-01-01",
              "end": "2009-09-30",
              "val": -1400000,
              "accn": "0001193125-09-227674",
              "fy": 2009,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2009-11-06"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": -1400000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": -1400000,
              "accn": "0001193125-10-043180",
              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": -1400000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-03-31",
              "val": 900000,
              "accn": "0001193125-11-134231",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-05-10",
              "frame": "CY2010Q1"
            },
            {
              "start": "2010-01-01",
              "end": "2010-03-31",
              "val": 900000,
              "accn": "0001193125-10-112933",
              "fy": 2010,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2010-05-07"
            },
            {
              "start": "2010-01-01",
              "end": "2010-06-30",
              "val": 1200000,
              "accn": "0001193125-11-212308",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-05"
            },
            {
              "start": "2010-01-01",
              "end": "2010-06-30",
              "val": 1200000,
              "accn": "0001193125-10-181102",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-08-06"
            },
            {
              "start": "2010-01-01",
              "end": "2010-09-30",
              "val": 1500000,
              "accn": "0001193125-11-304112",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-09"
            },
            {
              "start": "2010-01-01",
              "end": "2010-09-30",
              "val": 1500000,
              "accn": "0001193125-10-250139",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-11-05"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 5800000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 5800000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": -1700000,
              "accn": "0001193125-11-134231",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-05-10"
            },
            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": -1700000,
              "accn": "0001156375-12-000044",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-08",
              "frame": "CY2011Q1"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": -1600000,
              "accn": "0001193125-11-212308",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-08-05"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": -1600000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08"
            },
            {
              "start": "2011-04-01",
              "end": "2011-06-30",
              "val": 100000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08",
              "frame": "CY2011Q2"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": -1300000,
              "accn": "0001193125-11-304112",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-09"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": -1300000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08"
            },
            {
              "start": "2011-07-01",
              "end": "2011-09-30",
              "val": 200000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08",
              "frame": "CY2011Q3"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": -10900000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 700000,
              "accn": "0001156375-12-000044",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-08",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": 1100000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08"
            },
            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": 400000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08",
              "frame": "CY2012Q2"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 1500000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08"
            },
            {
              "start": "2012-07-01",
              "end": "2012-09-30",
              "val": 400000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08",
              "frame": "CY2012Q3"
            }
          ]
        }
      },
      "OtherComprehensiveIncomeDefinedBenefitPlansNetUnamortizedGainLossArisingDuringPeriodNetOfTax": {
        "label": "Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax",
        "description": "Amount, after tax, of gain (loss) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.",
        "units": {
          "USD": [
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": -15600000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": -1600000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": -1600000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 4500000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 4500000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": -11900000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011"
            }
          ]
        }
      },
      "OtherComprehensiveIncomeDefinedBenefitPlansTax": {
        "label": "Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Tax (Deprecated 2012-01-31)",
        "description": "Tax effects of the increase (decrease) to accumulated comprehensive income during the period related to benefit plans. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.",
        "units": {
          "USD": [
            {
              "start": "2007-01-01",
              "end": "2007-12-31",
              "val": 1600000,
              "accn": "0001193125-10-043180",
              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26",
              "frame": "CY2007"
            },
            {
              "start": "2008-01-01",
              "end": "2008-06-30",
              "val": 200000,
              "accn": "0001193125-09-187481",
              "fy": 2009,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2009-09-04"
            },
            {
              "start": "2008-01-01",
              "end": "2008-09-30",
              "val": 200000,
              "accn": "0001193125-09-227674",
              "fy": 2009,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2009-11-06"
            },
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": 10400000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2008"
            },
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": 10400000,
              "accn": "0001193125-10-043180",
              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26"
            },
            {
              "start": "2009-01-01",
              "end": "2009-03-31",
              "val": 900000,
              "accn": "0001193125-10-112933",
              "fy": 2010,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2010-05-07",
              "frame": "CY2009Q1"
            },
            {
              "start": "2009-01-01",
              "end": "2009-06-30",
              "val": 900000,
              "accn": "0001193125-10-181102",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-08-06"
            },
            {
              "start": "2009-01-01",
              "end": "2009-06-30",
              "val": 900000,
              "accn": "0001193125-09-187481",
              "fy": 2009,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2009-09-04"
            },
            {
              "start": "2009-01-01",
              "end": "2009-09-30",
              "val": 900000,
              "accn": "0001193125-10-250139",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-11-05"
            },
            {
              "start": "2009-01-01",
              "end": "2009-09-30",
              "val": 900000,
              "accn": "0001193125-09-227674",
              "fy": 2009,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2009-11-06"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 900000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 900000,
              "accn": "0001193125-10-043180",
              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 900000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-03-31",
              "val": 600000,
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            {
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            {
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            },
            {
              "start": "2010-01-01",
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              "val": 1000000,
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            {
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            {
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            {
              "start": "2011-01-01",
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            {
              "start": "2011-01-01",
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            {
              "start": "2011-01-01",
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            {
              "start": "2011-01-01",
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            {
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              "frame": "CY2011"
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            {
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              "val": -400000,
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            {
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            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": -200000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
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              "form": "10-Q",
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              "frame": "CY2012Q2"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": -900000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
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              "form": "10-Q",
              "filed": "2012-11-08"
            },
            {
              "start": "2012-07-01",
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              "val": -300000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08",
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          ]
        }
      },
      "OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease": {
        "label": "Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax (Deprecated 2012-01-31)",
        "description": "Net of tax effect change in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges after taxes. A cash flow hedge is a hedge of the exposure to variability in the cash flows of a recognized asset or liability or a forecasted transaction that is attributable to a particular risk. The change includes an entity's share of an equity investee's increase or decrease in deferred hedging gains or losses. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.",
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            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": -13300000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
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              "form": "10-K",
              "filed": "2011-02-28",
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            {
              "start": "2010-01-01",
              "end": "2010-12-31",
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            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": 300000,
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            },
            {
              "start": "2012-01-01",
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      },
      "OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxEffectPeriodIncreaseDecrease": {
        "label": "Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Tax Effect (Deprecated 2012-01-31)",
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            {
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            {
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      "OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPeriodIncreaseDecrease": {
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              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-08",
              "frame": "CY2011Q1"
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            {
              "start": "2011-01-01",
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              "val": 99900000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
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              "form": "10-Q",
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            {
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              "form": "10-Q",
              "filed": "2012-08-08",
              "frame": "CY2011Q2"
            },
            {
              "start": "2011-01-01",
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              "filed": "2012-11-08"
            },
            {
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              "accn": "0001156375-12-000121",
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              "form": "10-Q",
              "filed": "2012-11-08",
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            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 2400000,
              "accn": "0001156375-12-000044",
              "fy": 2012,
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              "filed": "2012-05-08",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": -400000,
              "accn": "0001156375-12-000093",
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            {
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              "end": "2012-06-30",
              "val": -2800000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
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              "form": "10-Q",
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              "frame": "CY2012Q2"
            },
            {
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              "end": "2012-09-30",
              "val": 5500000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
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              "form": "10-Q",
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            {
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              "val": 5900000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
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              "form": "10-Q",
              "filed": "2012-11-08",
              "frame": "CY2012Q3"
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      },
      "OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease": {
        "label": "Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax (Deprecated 2012-01-31)",
        "description": "Adjustment that results from the process of translating subsidiary financial statements and foreign equity investments into the reporting currency of the reporting entity, net of tax.",
        "units": {
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              "val": 400000,
              "accn": "0001193125-10-043180",
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              "filed": "2010-02-26",
              "frame": "CY2007"
            },
            {
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              "val": 500000,
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              "form": "10-Q/A",
              "filed": "2009-09-04"
            },
            {
              "start": "2008-01-01",
              "end": "2008-09-30",
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            },
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": -95700000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
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              "frame": "CY2008"
            },
            {
              "start": "2008-01-01",
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              "val": -95700000,
              "accn": "0001193125-10-043180",
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              "filed": "2010-02-26"
            },
            {
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              "val": -1200000,
              "accn": "0001193125-10-112933",
              "fy": 2010,
              "fp": "Q1",
              "form": "10-Q",
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              "frame": "CY2009Q1"
            },
            {
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              "accn": "0001193125-10-181102",
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            {
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            },
            {
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            },
            {
              "start": "2009-01-01",
              "end": "2009-09-30",
              "val": 3400000,
              "accn": "0001193125-09-227674",
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            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 2600000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
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              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 2600000,
              "accn": "0001193125-10-043180",
              "fy": 2009,
              "fp": "FY",
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              "filed": "2010-02-26"
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            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 2600000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-03-31",
              "val": -3300000,
              "accn": "0001193125-11-134231",
              "fy": 2011,
              "fp": "Q1",
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        "label": "Payments to Acquire Businesses, Gross",
        "description": "The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.",
        "units": {
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              "end": "2018-12-31",
              "val": 2500000000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 2500000000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2018"
            }
          ]
        }
      },
      "PaymentsToAcquireBusinessesNetOfCashAcquired": {
        "label": "Payments to Acquire Businesses, Net of Cash Acquired",
        "description": "The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.",
        "units": {
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              "end": "2007-12-31",
              "val": 0,
              "accn": "0001193125-10-043180",
              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26",
              "frame": "CY2007"
            },
            {
              "start": "2008-01-01",
              "end": "2008-06-30",
              "val": 93700000,
              "accn": "0001193125-09-187481",
              "fy": 2009,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2009-09-04"
            },
            {
              "start": "2008-01-01",
              "end": "2008-09-30",
              "val": 94200000,
              "accn": "0001193125-09-227674",
              "fy": 2009,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2009-11-06"
            },
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": 94100000,
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              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26"
            },
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": 2864000000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
              "end": "2009-06-30",
              "val": 0,
              "accn": "0001193125-09-187481",
              "fy": 2009,
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            },
            {
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            },
            {
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              "filed": "2010-02-26"
            },
            {
              "start": "2009-01-01",
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              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
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              "filed": "2012-02-28",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 19600000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 19600000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 19600000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 0,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 0,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 0,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2011"
            },
            {
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              "val": 162900000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01"
            },
            {
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              "val": 162900000,
              "accn": "0001156375-14-000012",
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              "form": "10-K",
              "filed": "2014-03-03"
            },
            {
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              "val": 162900000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
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              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
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              "val": 0,
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              "filed": "2014-03-03"
            },
            {
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              "val": 0,
              "accn": "0001156375-15-000014",
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              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 0,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 0,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 0,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 0,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 1795400000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 1795400000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 1795400000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2018"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 0,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 0,
              "accn": "0001156375-21-000020",
              "fy": 2020,
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              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2019"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 0,
              "accn": "0001156375-21-000020",
              "fy": 2020,
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              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2020"
            }
          ]
        }
      },
      "PaymentsToAcquireEquityMethodInvestments": {
        "label": "Payments to Acquire Equity Method Investments",
        "description": "The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.",
        "units": {
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              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-09-30",
              "val": 17400000,
              "accn": "0001193125-10-250139",
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              "form": "10-Q",
              "filed": "2010-11-05"
            },
            {
              "start": "2010-01-01",
              "end": "2010-09-30",
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              "accn": "0001193125-11-304112",
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              "filed": "2011-11-09"
            },
            {
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              "accn": "0001193125-11-050252",
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              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
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              "filed": "2012-02-28",
              "frame": "CY2010"
            },
            {
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              "form": "10-Q",
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              "frame": "CY2011Q1"
            },
            {
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              "form": "10-Q",
              "filed": "2012-08-08"
            },
            {
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              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011"
            },
            {
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              "end": "2012-03-31",
              "val": 22800000,
              "accn": "0001156375-12-000044",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-08"
            },
            {
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              "filed": "2013-05-08",
              "frame": "CY2012Q1"
            },
            {
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              "end": "2012-06-30",
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              "filed": "2012-08-08"
            },
            {
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              "form": "10-Q",
              "filed": "2013-08-08"
            },
            {
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              "filed": "2013-08-09"
            },
            {
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              "filed": "2013-11-08"
            },
            {
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            },
            {
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            {
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              "filed": "2013-08-09"
            },
            {
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              "filed": "2013-11-08"
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            {
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              "accn": "0001156375-22-000215",
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              "filed": "2022-08-03"
            },
            {
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            },
            {
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            },
            {
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              "accn": "0001156375-23-000129",
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              "fp": "Q2",
              "form": "10-Q",
              "filed": "2023-08-02"
            },
            {
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              "end": "2022-09-30",
              "val": 410000000,
              "accn": "0001156375-22-000312",
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2022-11-02"
            },
            {
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              "end": "2022-09-30",
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              "accn": "0001156375-23-000190",
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              "form": "10-Q",
              "filed": "2023-11-01"
            },
            {
              "start": "2023-01-01",
              "end": "2023-06-30",
              "val": 0,
              "accn": "0001156375-23-000129",
              "fy": 2023,
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              "filed": "2023-08-02"
            },
            {
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              "accn": "0001156375-23-000190",
              "fy": 2023,
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              "form": "10-Q",
              "filed": "2023-11-01"
            }
          ]
        }
      },
      "PaymentsToAcquireInterestInSubsidiariesAndAffiliates": {
        "label": "Payments to Acquire Interest in Subsidiaries and Affiliates",
        "description": "The cash outflow associated with the acquisition of or advances to an entity that is related to it but not strictly controlled (for example, an unconsolidated subsidiary, affiliate, and joint venture or equity method investment) or the acquisition of an additional interest in a subsidiary (controlled entity).",
        "units": {
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              "end": "2007-12-31",
              "val": 19000000,
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              "form": "10-K",
              "filed": "2010-02-26",
              "frame": "CY2007"
            },
            {
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              "end": "2008-06-30",
              "val": 4600000,
              "accn": "0001193125-09-187481",
              "fy": 2009,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2009-09-04"
            },
            {
              "start": "2008-01-01",
              "end": "2008-09-30",
              "val": 7200000,
              "accn": "0001193125-09-227674",
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              "filed": "2009-11-06"
            },
            {
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              "form": "10-K",
              "filed": "2010-02-26"
            },
            {
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              "filed": "2011-02-28",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
              "end": "2009-03-31",
              "val": 2000000,
              "accn": "0001193125-10-112933",
              "fy": 2010,
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              "form": "10-Q",
              "filed": "2010-05-07",
              "frame": "CY2009Q1"
            },
            {
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              "end": "2009-06-30",
              "val": 2900000,
              "accn": "0001193125-09-187481",
              "fy": 2009,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2009-09-04"
            },
            {
              "start": "2009-01-01",
              "end": "2009-06-30",
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              "accn": "0001193125-10-181102",
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              "filed": "2010-08-06"
            },
            {
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              "accn": "0001193125-09-227674",
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              "fp": "Q3",
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              "filed": "2009-11-06"
            },
            {
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              "end": "2009-09-30",
              "val": 2800000,
              "accn": "0001193125-10-250139",
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              "form": "10-Q",
              "filed": "2010-11-05"
            },
            {
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              "end": "2009-12-31",
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              "accn": "0001193125-10-043180",
              "fy": 2009,
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              "form": "10-K",
              "filed": "2010-02-26"
            },
            {
              "start": "2009-01-01",
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              "val": 3100000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
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              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
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              "end": "2009-12-31",
              "val": 3100000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
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              "val": 0,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 0,
              "accn": "0001156375-12-000016",
              "fy": 2011,
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              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2011"
            },
            {
              "start": "2019-01-01",
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        "label": "Prepaid Expense Other, Noncurrent",
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        "label": "Prepaid Insurance",
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        "label": "Proceeds from Divestiture of Businesses",
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      },
      "ProceedsFromDivestitureOfBusinessesNetOfCashDivested": {
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      "ProceedsFromIssuanceOfCommercialPaper": {
        "label": "Proceeds from Issuance of Commercial Paper",
        "description": "The cash inflow from borrowing by issuing commercial paper.",
        "units": {
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            },
            {
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              "val": 0,
              "accn": "0001156375-19-000010",
              "fy": 2018,
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              "filed": "2019-02-28",
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            },
            {
              "start": "2018-01-01",
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              "accn": "0001156375-19-000010",
              "fy": 2018,
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              "filed": "2019-02-28",
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            },
            {
              "start": "2020-01-01",
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              "val": 1300000000,
              "accn": "0001156375-20-000079",
              "fy": 2020,
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            {
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              "accn": "0001156375-20-000119",
              "fy": 2020,
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            {
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              "frame": "CY2020"
            }
          ]
        }
      },
      "ProceedsFromIssuanceOfDebt": {
        "label": "Proceeds from Issuance of Debt",
        "description": "The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.",
        "units": {
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            },
            {
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      "ProceedsFromSaleOfBuildings": {
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      "ProceedsFromSaleOfIntangibleAssets": {
        "label": "Proceeds from Sale of Intangible Assets",
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              "end": "2025-03-31",
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              "fy": 2025,
              "fp": "Q1",
              "form": "10-Q",
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              "frame": "CY2025Q1I"
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            {
              "end": "2025-06-30",
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              "accn": "0001156375-25-000182",
              "fy": 2025,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2025-07-25",
              "frame": "CY2025Q2I"
            },
            {
              "end": "2025-09-30",
              "val": 355200000,
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              "end": "2025-12-31",
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              "filed": "2026-04-24"
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              "end": "2025-12-31",
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              "fp": "Q1",
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          ]
        }
      },
      "PropertyPlantAndEquipmentUsefulLifeMaximum": {
        "label": "Property, Plant and Equipment, Useful Life, Maximum (Deprecated 2012-01-31)",
        "description": "The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.",
        "units": {
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              "val": 39,
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              "filed": "2012-02-28",
              "frame": "CY2011"
            }
          ]
        }
      },
      "PropertyPlantAndEquipmentUsefulLifeMinimum": {
        "label": "Property, Plant and Equipment, Useful Life, Minimum (Deprecated 2012-01-31)",
        "description": "The minimum useful life of long lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software.",
        "units": {
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              "start": "2011-01-01",
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              "val": 2,
              "accn": "0001156375-12-000016",
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          ]
        }
      },
      "ProvisionForDoubtfulAccounts": {
        "label": "Accounts Receivable, Credit Loss Expense (Reversal)",
        "description": "Amount of expense (reversal of expense) for expected credit loss on accounts receivable.",
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              "end": "2007-12-31",
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            {
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              "val": 0,
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              "form": "10-Q/A",
              "filed": "2009-09-04"
            },
            {
              "start": "2008-01-01",
              "end": "2008-09-30",
              "val": 600000,
              "accn": "0001193125-09-227674",
              "fy": 2009,
              "fp": "Q3",
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              "filed": "2009-11-06"
            },
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": -100000,
              "accn": "0001193125-10-043180",
              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
              "end": "2009-06-30",
              "val": -100000,
              "accn": "0001193125-09-187481",
              "fy": 2009,
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              "filed": "2009-09-04"
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            {
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            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 100000,
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              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 0,
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              "fp": "FY",
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              "filed": "2012-02-28",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 0,
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              "filed": "2013-03-01",
              "frame": "CY2010"
            },
            {
              "start": "2010-01-01",
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            {
              "start": "2011-01-01",
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              "accn": "0001156375-14-000012",
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              "frame": "CY2011"
            },
            {
              "start": "2011-01-01",
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              "val": 21700000,
              "accn": "0001156375-13-000007",
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              "filed": "2013-03-01"
            },
            {
              "start": "2011-01-01",
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              "val": 21700000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
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              "accn": "0001156375-14-000012",
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              "filed": "2014-03-03",
              "frame": "CY2012"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0,
              "accn": "0001156375-13-000007",
              "fy": 2012,
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              "filed": "2013-03-01"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001156375-14-000012",
              "fy": 2013,
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              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013"
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          ]
        }
      },
      "ReceivablesFromBrokersDealersAndClearingOrganizations": {
        "label": "Receivables from Brokers-Dealers and Clearing Organizations",
        "description": "Amount receivable from broker-dealers and clearing organizations, including, but not limited to, securities failed-to-deliver, certain deposits for securities borrowed, open transactions, good faith and margin deposits, commissions and floor brokerage receivables.",
        "units": {
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              "end": "2009-12-31",
              "val": 8800000,
              "accn": "0001193125-11-050252",
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              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
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            {
              "end": "2010-12-31",
              "val": 11200000,
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              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "ReclassificationFromAociCurrentPeriodTax": {
        "label": "Reclassification from AOCI, Current Period, Tax",
        "description": "Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income (loss).",
        "units": {
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              "end": "2015-12-31",
              "val": 0,
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            },
            {
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              "fy": 2017,
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              "form": "10-Q",
              "filed": "2017-05-04",
              "frame": "CY2016Q1"
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            {
              "start": "2016-01-01",
              "end": "2016-06-30",
              "val": 0,
              "accn": "0001156375-17-000080",
              "fy": 2017,
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              "filed": "2017-08-02"
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            {
              "start": "2016-01-01",
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              "val": 0,
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              "filed": "2017-11-02"
            },
            {
              "start": "2016-01-01",
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              "val": 0,
              "accn": "0001156375-18-000026",
              "fy": 2017,
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              "filed": "2018-03-01"
            },
            {
              "start": "2016-01-01",
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              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-03-31",
              "val": -87800000,
              "accn": "0001156375-17-000045",
              "fy": 2017,
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              "form": "10-Q",
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            {
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              "fy": 2018,
              "fp": "Q1",
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              "val": -87800000,
              "accn": "0001156375-17-000080",
              "fy": 2017,
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              "form": "10-Q",
              "filed": "2017-08-02"
            },
            {
              "start": "2017-01-01",
              "end": "2017-06-30",
              "val": -87800000,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01"
            },
            {
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              "fp": "Q3",
              "form": "10-Q",
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            },
            {
              "start": "2017-01-01",
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              "val": -87800000,
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              "form": "10-Q",
              "filed": "2018-11-02"
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            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": -87800000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01"
            },
            {
              "start": "2017-01-01",
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              "val": -87800000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": -87800000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-03-31",
              "val": 0,
              "accn": "0001156375-18-000047",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-05-03",
              "frame": "CY2018Q1"
            },
            {
              "start": "2018-01-01",
              "end": "2018-06-30",
              "val": 0,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": 0,
              "accn": "0001156375-18-000128",
              "fy": 2018,
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              "filed": "2018-11-02"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 0,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
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              "filed": "2019-02-28"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 0,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2018"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 0,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2019"
            },
            {
              "start": "2025-01-01",
              "end": "2025-06-30",
              "val": -10200000,
              "accn": "0001156375-26-000047",
              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-24"
            },
            {
              "start": "2026-01-01",
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              "val": 4100000,
              "accn": "0001156375-26-000047",
              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-24"
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          ]
        }
      },
      "RedeemableNoncontrollingInterestEquityCarryingAmount": {
        "label": "Redeemable Noncontrolling Interest, Equity, Carrying Amount",
        "description": "As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity.",
        "units": {
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              "accn": "0001156375-15-000014",
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              "filed": "2015-02-26",
              "frame": "CY2011Q4I"
            },
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              "end": "2012-12-31",
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              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "end": "2012-12-31",
              "val": 80800000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2012Q4I"
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              "end": "2013-12-31",
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              "fy": 2014,
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              "filed": "2015-02-26"
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          ]
        }
      },
      "RepaymentsOfLongTermDebt": {
        "label": "Repayments of Long-term Debt",
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        "units": {
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              "accn": "0001156375-13-000140",
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              "filed": "2014-05-07",
              "frame": "CY2013Q1"
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              "start": "2013-01-01",
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              "val": 750000000,
              "accn": "0001156375-13-000140",
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            {
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              "fp": "Q1",
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              "filed": "2014-05-07"
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            {
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              "val": 750000000,
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              "fy": 2015,
              "fp": "Q1",
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              "filed": "2015-05-06",
              "frame": "CY2014Q1"
            },
            {
              "start": "2014-01-01",
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              "val": 750000000,
              "accn": "0001156375-14-000073",
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            },
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              "val": 750000000,
              "accn": "0001156375-15-000067",
              "fy": 2015,
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              "form": "10-Q",
              "filed": "2015-08-05"
            },
            {
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              "val": 750000000,
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              "fy": 2014,
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            {
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            {
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              "val": 0,
              "accn": "0001156375-15-000046",
              "fy": 2015,
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            },
            {
              "start": "2015-01-01",
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              "val": 673000000,
              "accn": "0001156375-15-000067",
              "fy": 2015,
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            {
              "start": "2015-01-01",
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              "val": 673000000,
              "accn": "0001156375-16-000195",
              "fy": 2016,
              "fp": "Q2",
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              "val": 167,
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            {
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            {
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              "fy": 2025,
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          ]
        }
      },
      "ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate": {
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate",
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      },
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        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value",
        "description": "Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.",
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              "frame": "CY2009"
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              "val": 7300000,
              "accn": "0001156375-24-000200",
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2024-11-08"
            },
            {
              "start": "2023-07-01",
              "end": "2023-09-30",
              "val": 2500000,
              "accn": "0001156375-23-000190",
              "fy": 2023,
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              "form": "10-Q",
              "filed": "2023-11-01"
            },
            {
              "start": "2023-07-01",
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              "val": 2500000,
              "accn": "0001156375-24-000200",
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            {
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              "val": 9800000,
              "accn": "0001156375-24-000010",
              "fy": 2023,
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              "filed": "2024-02-28"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 9800000,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2023"
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            {
              "start": "2024-01-01",
              "end": "2024-03-31",
              "val": 2300000,
              "accn": "0001156375-24-000072",
              "fy": 2024,
              "fp": "Q1",
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              "filed": "2024-05-01"
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            {
              "start": "2024-01-01",
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              "val": 2300000,
              "accn": "0001156375-25-000103",
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              "form": "10-Q",
              "filed": "2025-04-30",
              "frame": "CY2024Q1"
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            {
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              "val": 4700000,
              "accn": "0001156375-24-000149",
              "fy": 2024,
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            {
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              "val": 4700000,
              "accn": "0001156375-25-000182",
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            },
            {
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            },
            {
              "start": "2024-04-01",
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              "val": 2400000,
              "accn": "0001156375-25-000182",
              "fy": 2025,
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              "frame": "CY2024Q2"
            },
            {
              "start": "2024-01-01",
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              "val": 7200000,
              "accn": "0001156375-24-000200",
              "fy": 2024,
              "fp": "Q3",
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            },
            {
              "start": "2024-01-01",
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              "val": 7200000,
              "accn": "0001156375-25-000206",
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            },
            {
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              "val": 2500000,
              "accn": "0001156375-24-000200",
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              "filed": "2024-11-08"
            },
            {
              "start": "2024-07-01",
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              "val": 2500000,
              "accn": "0001156375-25-000206",
              "fy": 2025,
              "fp": "Q3",
              "form": "10-Q",
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              "frame": "CY2024Q3"
            },
            {
              "start": "2024-01-01",
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              "val": 9800000,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
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              "filed": "2025-02-27"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": 9800000,
              "accn": "0001156375-26-000009",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-26",
              "frame": "CY2024"
            },
            {
              "start": "2025-01-01",
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              "val": 2900000,
              "accn": "0001156375-25-000103",
              "fy": 2025,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2025-04-30"
            },
            {
              "start": "2025-01-01",
              "end": "2025-03-31",
              "val": 2900000,
              "accn": "0001156375-26-000020",
              "fy": 2026,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2026-04-24",
              "frame": "CY2025Q1"
            },
            {
              "start": "2025-01-01",
              "end": "2025-06-30",
              "val": 6200000,
              "accn": "0001156375-25-000182",
              "fy": 2025,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2025-07-25"
            },
            {
              "start": "2025-01-01",
              "end": "2025-06-30",
              "val": 6200000,
              "accn": "0001156375-26-000047",
              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-24"
            },
            {
              "start": "2025-04-01",
              "end": "2025-06-30",
              "val": 3300000,
              "accn": "0001156375-25-000182",
              "fy": 2025,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2025-07-25"
            },
            {
              "start": "2025-04-01",
              "end": "2025-06-30",
              "val": 3300000,
              "accn": "0001156375-26-000047",
              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-24",
              "frame": "CY2025Q2"
            },
            {
              "start": "2025-01-01",
              "end": "2025-09-30",
              "val": 9400000,
              "accn": "0001156375-25-000206",
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              "fp": "Q3",
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              "filed": "2025-10-24"
            },
            {
              "start": "2025-07-01",
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              "val": 3200000,
              "accn": "0001156375-25-000206",
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              "fp": "Q3",
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              "frame": "CY2025Q3"
            },
            {
              "start": "2025-01-01",
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              "val": 13800000,
              "accn": "0001156375-26-000009",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-26",
              "frame": "CY2025"
            },
            {
              "start": "2026-01-01",
              "end": "2026-03-31",
              "val": 3900000,
              "accn": "0001156375-26-000020",
              "fy": 2026,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2026-04-24",
              "frame": "CY2026Q1"
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            {
              "start": "2026-01-01",
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              "val": 7800000,
              "accn": "0001156375-26-000047",
              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-24"
            },
            {
              "start": "2026-04-01",
              "end": "2026-06-30",
              "val": 3900000,
              "accn": "0001156375-26-000047",
              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-24",
              "frame": "CY2026Q2"
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        }
      },
      "SubsidiaryOrEquityMethodInvesteeCumulativePercentageOwnershipAfterAllTransactions": {
        "label": "Subsidiary or Equity Method Investee, Cumulative Percentage Ownership after All Transactions",
        "description": "Percentage of subsidiary's or equity method investee's stock owned by parent immediately after all stock transactions.",
        "units": {
          "pure": [
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              "start": "2015-01-01",
              "end": "2015-06-30",
              "val": 0.05,
              "accn": "0001156375-15-000067",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-08-05"
            },
            {
              "start": "2015-01-01",
              "end": "2015-09-30",
              "val": 0.05,
              "accn": "0001156375-15-000108",
              "fy": 2015,
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              "form": "10-Q",
              "filed": "2015-11-06"
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          ]
        }
      },
      "TangibleAssetImpairmentCharges": {
        "label": "Tangible Asset Impairment Charges",
        "description": "The charge against earnings resulting from the aggregate write down of tangible assets from their carrying value to their fair value.",
        "units": {
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              "start": "2019-01-01",
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              "val": 12300000,
              "accn": "0001156375-19-000087",
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            {
              "start": "2019-01-01",
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              "fy": 2019,
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            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 20900000,
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              "fy": 2019,
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              "form": "10-K",
              "filed": "2020-02-28",
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          ]
        }
      },
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        "label": "Tax Cuts and Jobs Act, Reclassification from AOCI to Retained Earnings, Tax Effect",
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        "units": {
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        "label": "Temporary Equity, Carrying Amount (Deprecated 2012-01-31)",
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        "units": {
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              "val": 0,
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            {
              "end": "2010-03-31",
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              "filed": "2010-11-05",
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            {
              "end": "2010-12-31",
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            {
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            {
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            {
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              "fy": 2011,
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            {
              "end": "2011-06-30",
              "val": 70600000,
              "accn": "0001193125-11-212308",
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              "filed": "2011-08-05",
              "frame": "CY2011Q2I"
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            {
              "end": "2011-09-30",
              "val": 69500000,
              "accn": "0001193125-11-304112",
              "fy": 2011,
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              "form": "10-Q",
              "filed": "2011-11-09",
              "frame": "CY2011Q3I"
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            {
              "end": "2011-12-31",
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              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
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              "filed": "2012-11-08",
              "frame": "CY2011Q4I"
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            {
              "end": "2011-12-31",
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              "accn": "0001156375-12-000093",
              "fy": 2012,
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              "filed": "2012-08-08"
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            {
              "end": "2011-12-31",
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            {
              "end": "2011-12-31",
              "val": 70300000,
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              "fy": 2011,
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            {
              "end": "2012-03-31",
              "val": 70000000,
              "accn": "0001156375-12-000044",
              "fy": 2012,
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              "filed": "2012-05-08",
              "frame": "CY2012Q1I"
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            {
              "end": "2012-06-30",
              "val": 78400000,
              "accn": "0001156375-12-000093",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-08",
              "frame": "CY2012Q2I"
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            {
              "end": "2012-09-30",
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              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08",
              "frame": "CY2012Q3I"
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      },
      "TemporaryEquityCarryingAmountAttributableToNoncontrollingInterest": {
        "label": "Temporary Equity, Carrying Amount, Attributable to Noncontrolling Interest (Deprecated 2014-01-31)",
        "description": "Carrying amount, attributable to noncontrolling interests, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer.",
        "units": {
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              "end": "2009-12-31",
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              "fy": 2012,
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              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2009Q4I"
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            {
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              "val": 68100000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2010Q4I"
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            {
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            {
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              "fy": 2013,
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              "filed": "2014-03-03",
              "frame": "CY2011Q4I"
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            {
              "end": "2011-12-31",
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              "fy": 2012,
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            },
            {
              "end": "2012-12-31",
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              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
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              "frame": "CY2012Q4I"
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            {
              "end": "2012-12-31",
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              "fy": 2013,
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              "form": "10-Q",
              "filed": "2013-11-08"
            },
            {
              "end": "2012-12-31",
              "val": 80800000,
              "accn": "0001156375-13-000109",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2013-08-09"
            },
            {
              "end": "2012-12-31",
              "val": 80800000,
              "accn": "0001156375-13-000107",
              "fy": 2013,
              "fp": "Q2",
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              "filed": "2013-08-08"
            },
            {
              "end": "2012-12-31",
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              "fy": 2013,
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            {
              "end": "2013-03-31",
              "val": 82200000,
              "accn": "0001156375-13-000050",
              "fy": 2013,
              "fp": "Q1",
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              "filed": "2013-05-08",
              "frame": "CY2013Q1I"
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            {
              "end": "2013-06-30",
              "val": 0,
              "accn": "0001156375-13-000109",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2013-08-09",
              "frame": "CY2013Q2I"
            },
            {
              "end": "2013-06-30",
              "val": 0,
              "accn": "0001156375-13-000107",
              "fy": 2013,
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              "form": "10-Q",
              "filed": "2013-08-08"
            },
            {
              "end": "2013-09-30",
              "val": 0,
              "accn": "0001156375-13-000140",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-11-08",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013Q4I"
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          ]
        }
      },
      "TemporaryEquityIssuePeriodIncreaseOrDecrease": {
        "label": "Temporary Equity, Carrying Amount, Period Increase (Decrease)",
        "description": "Change in the value of each type or class of stock classified as temporary equity during the period. The redemption requirement does not constitute an unconditional obligation that will be settled in a variable number of shares constituting a monetary value predominantly indexed to (a) a fixed monetary amount known at inception, (b) an amount inversely correlated with the residual value of the entity, or (c) an amount determined by reference to something other than the fair value of issuer's stock. Does not include mandatorily redeemable stock. The exception is if redemption is required upon liquidation or termination of the reporting entity.",
        "units": {
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              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": -82300000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": -82300000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2013"
            }
          ]
        }
      },
      "TemporaryEquityOtherChanges": {
        "label": "Temporary Equity, Other Changes",
        "description": "Amount of increase (decrease) in temporary equity from changes classified as other.",
        "units": {
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            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 0,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2010"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 0,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 100000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2011"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 100000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 100000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2012"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2013"
            }
          ]
        }
      },
      "TradingSecurities": {
        "label": "Debt Securities, Trading, and Equity Securities, FV-NI",
        "description": "Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading) and investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).",
        "units": {
          "USD": [
            {
              "end": "2009-12-31",
              "val": 23400000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 28800000,
              "accn": "0001193125-11-050252",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-28"
            },
            {
              "end": "2010-12-31",
              "val": 28800000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 31800000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28"
            },
            {
              "end": "2011-12-31",
              "val": 31800000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 38700000,
              "accn": "0001156375-13-000007",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-03-01"
            },
            {
              "end": "2012-12-31",
              "val": 38700000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 49600000,
              "accn": "0001156375-14-000012",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-03-03"
            },
            {
              "end": "2013-12-31",
              "val": 49600000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 55100000,
              "accn": "0001156375-15-000014",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "end": "2014-12-31",
              "val": 55100000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 55900000,
              "accn": "0001156375-16-000116",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-26"
            },
            {
              "end": "2015-12-31",
              "val": 55900000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 62700000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27"
            },
            {
              "end": "2016-12-31",
              "val": 62700000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 68900000,
              "accn": "0001156375-18-000026",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-03-01"
            },
            {
              "end": "2017-12-31",
              "val": 68900000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 52700000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28"
            },
            {
              "end": "2018-12-31",
              "val": 52700000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 66100000,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28"
            },
            {
              "end": "2019-12-31",
              "val": 66100000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 82600000,
              "accn": "0001156375-21-000020",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-26"
            },
            {
              "end": "2020-12-31",
              "val": 82600000,
              "accn": "0001156375-22-000076",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-25",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-12-31",
              "val": 98600000,
              "accn": "0001156375-22-000076",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-25"
            },
            {
              "end": "2021-12-31",
              "val": 98600000,
              "accn": "0001156375-23-000020",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-27",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-12-31",
              "val": 84500000,
              "accn": "0001156375-23-000020",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-27"
            },
            {
              "end": "2022-12-31",
              "val": 84500000,
              "accn": "0001156375-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-28",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 101300000,
              "accn": "0001156375-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-28"
            },
            {
              "end": "2023-12-31",
              "val": 101300000,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 104200000,
              "accn": "0001156375-25-000021",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27"
            },
            {
              "end": "2024-12-31",
              "val": 104200000,
              "accn": "0001156375-26-000009",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-26",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 116300000,
              "accn": "0001156375-26-000009",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-26",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "TreasuryStockShares": {
        "label": "Treasury Stock, Shares",
        "description": "Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.",
        "units": {
          "shares": [
            {
              "end": "2010-06-30",
              "val": 1000000,
              "accn": "0001193125-10-181102",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-08-06",
              "frame": "CY2010Q2I"
            }
          ]
        }
      },
      "TreasuryStockValue": {
        "label": "Treasury Stock, Value",
        "description": "The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.",
        "units": {
          "USD": [
            {
              "end": "2010-08-06",
              "val": 279100000,
              "accn": "0001193125-10-181102",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-08-06",
              "frame": "CY2010Q2I"
            }
          ]
        }
      },
      "UnamortizedDebtIssuanceExpense": {
        "label": "Unamortized Debt Issuance Expense",
        "description": "The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.",
        "units": {
          "USD": [
            {
              "end": "2015-12-31",
              "val": 12100000,
              "accn": "0001156375-16-000149",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-05-04"
            },
            {
              "end": "2015-12-31",
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              "accn": "0001156375-16-000195",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-08-04"
            },
            {
              "end": "2015-12-31",
              "val": 12100000,
              "accn": "0001156375-16-000255",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-11-04"
            },
            {
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              "val": 12100000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-03-31",
              "val": 11900000,
              "accn": "0001156375-16-000149",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-05-04",
              "frame": "CY2016Q1I"
            },
            {
              "end": "2016-06-30",
              "val": 11600000,
              "accn": "0001156375-16-000195",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-08-04",
              "frame": "CY2016Q2I"
            },
            {
              "end": "2016-09-30",
              "val": 11400000,
              "accn": "0001156375-16-000255",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-11-04",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2016-12-31",
              "val": 11100000,
              "accn": "0001156375-17-000016",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-27",
              "frame": "CY2016Q4I"
            }
          ]
        }
      },
      "UnrealizedGainLossOnCashFlowHedgingInstruments": {
        "label": "Unrealized Gain (Loss) on Cash Flow Hedging Instruments",
        "description": "Amount of unrealized gain (loss) related to derivatives designated as cash flow hedging instruments, recorded in results of operations to the extent that the cash flow hedge is determined to be ineffective.",
        "units": {
          "USD": [
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              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": -5200000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2009"
            },
            {
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              "end": "2010-12-31",
              "val": -5800000,
              "accn": "0001156375-12-000016",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-28",
              "frame": "CY2010"
            }
          ]
        }
      },
      "UnrealizedGainLossOnDerivatives": {
        "label": "Unrealized Gain (Loss) on Derivatives",
        "description": "The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.",
        "units": {
          "USD": [
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              "start": "2008-01-01",
              "end": "2008-06-30",
              "val": -15200000,
              "accn": "0001193125-09-187481",
              "fy": 2009,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2009-09-04"
            },
            {
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              "end": "2008-09-30",
              "val": -7800000,
              "accn": "0001193125-09-227674",
              "fy": 2009,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2009-11-06"
            },
            {
              "start": "2009-01-01",
              "end": "2009-06-30",
              "val": 0,
              "accn": "0001193125-09-187481",
              "fy": 2009,
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              "form": "10-Q/A",
              "filed": "2009-09-04"
            },
            {
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              "end": "2009-09-30",
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              "accn": "0001193125-09-227674",
              "fy": 2009,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2009-11-06"
            },
            {
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              "end": "2011-09-30",
              "val": 400000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": -30100000,
              "accn": "0001156375-12-000121",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-08"
            },
            {
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              "end": "2016-12-31",
              "val": 0,
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              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-06-30",
              "val": 0,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01"
            },
            {
              "start": "2017-01-01",
              "end": "2017-09-30",
              "val": 0,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 0,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28"
            },
            {
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              "end": "2017-12-31",
              "val": 0,
              "accn": "0001156375-20-000013",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-28",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-03-31",
              "val": 0,
              "accn": "0001156375-19-000039",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-08",
              "frame": "CY2018Q1"
            },
            {
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              "end": "2018-06-30",
              "val": -36900000,
              "accn": "0001156375-18-000083",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-08-01"
            },
            {
              "start": "2018-01-01",
              "end": "2018-06-30",
              "val": -36900000,
              "accn": "0001156375-19-000087",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-08-07"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": -51400000,
              "accn": "0001156375-18-000128",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-11-02"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": -51400000,
              "accn": "0001156375-19-000114",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-11-06"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": -62300000,
              "accn": "0001156375-19-000010",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-28"
            },
            {
              "start": "2018-01-01",
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              "filed": "2020-11-04"
            },
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            },
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              "end": "2019-12-31",
              "val": -17700000,
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              "filed": "2021-05-05",
              "frame": "CY2020Q1"
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              "val": 1600000,
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              "fy": 2020,
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              "form": "10-Q",
              "filed": "2020-08-05"
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              "fy": 2020,
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              "filed": "2021-02-26"
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            {
              "start": "2020-01-01",
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              "val": 1500000,
              "accn": "0001156375-22-000076",
              "fy": 2021,
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              "filed": "2022-02-25"
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            {
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              "val": 0,
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              "fy": 2021,
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              "frame": "CY2021Q1"
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            {
              "start": "2021-01-01",
              "end": "2021-06-30",
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            {
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              "fy": 2022,
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              "form": "10-Q",
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            },
            {
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              "accn": "0001156375-13-000007",
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            {
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              "val": 37700000,
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