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      "AdditionalPaidInCapital": {
        "label": "Additional Paid in Capital",
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            {
              "start": "2017-04-01",
              "end": "2017-06-30",
              "val": 0,
              "accn": "0000073124-17-000251",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-07-27",
              "frame": "CY2017Q2"
            },
            {
              "start": "2017-01-01",
              "end": "2017-09-30",
              "val": 0,
              "accn": "0000073124-17-000310",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-10-26"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 0,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 0,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 0,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2018"
            }
          ]
        }
      },
      "AllowanceForLoanAndLeaseLossesProvisionForLossNet": {
        "label": "Allowance for Loan and Lease Losses, Provision for Loss, Net (Deprecated 2013-01-31)",
        "description": "Reflects the amount charged against earnings during the period as bad debt expense, net of recoveries of previously expensed credit losses.",
        "units": {
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              "end": "2008-12-31",
              "val": 115000000,
              "accn": "0001193125-11-047592",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
              "end": "2009-06-30",
              "val": 115000000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "start": "2009-04-01",
              "end": "2009-06-30",
              "val": 60000000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2009Q2"
            },
            {
              "start": "2009-01-01",
              "end": "2009-09-30",
              "val": 175000000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27"
            },
            {
              "start": "2009-07-01",
              "end": "2009-09-30",
              "val": 60000000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q3"
            },
            {
              "start": "2008-12-31",
              "end": "2009-12-31",
              "val": 215000000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2009"
            },
            {
              "start": "2008-12-31",
              "end": "2009-12-31",
              "val": 215000000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25"
            },
            {
              "start": "2010-01-01",
              "end": "2010-03-31",
              "val": 40000000,
              "accn": "0001193125-11-118294",
              "fy": 2011,
              "fp": "Q1",
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              "frame": "CY2010Q1"
            },
            {
              "start": "2010-01-01",
              "end": "2010-06-30",
              "val": 90000000,
              "accn": "0001193125-11-202586",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-29"
            },
            {
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              "end": "2010-06-30",
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              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
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              "val": 50000000,
              "accn": "0001193125-11-202586",
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              "form": "10-Q",
              "filed": "2011-07-29",
              "frame": "CY2010Q2"
            },
            {
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              "end": "2010-06-30",
              "val": 50000000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "start": "2010-01-01",
              "end": "2010-09-30",
              "val": 120000000,
              "accn": "0001193125-11-286394",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-28"
            },
            {
              "start": "2010-01-01",
              "end": "2010-09-30",
              "val": 120000000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27"
            },
            {
              "start": "2010-07-01",
              "end": "2010-09-30",
              "val": 30000000,
              "accn": "0001193125-11-286394",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-28",
              "frame": "CY2010Q3"
            },
            {
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              "end": "2010-09-30",
              "val": 30000000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 160000000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2010"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 160000000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 160000000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25"
            },
            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": 15000000,
              "accn": "0001193125-12-195882",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2011Q1"
            },
            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": 15000000,
              "accn": "0001193125-11-118294",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-04-29"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": 25000000,
              "accn": "0001193125-12-319119",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-27"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": 25000000,
              "accn": "0001193125-11-202586",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-29"
            },
            {
              "start": "2011-04-01",
              "end": "2011-06-30",
              "val": 10000000,
              "accn": "0001193125-12-319119",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-27",
              "frame": "CY2011Q2"
            },
            {
              "start": "2011-04-01",
              "end": "2011-06-30",
              "val": 10000000,
              "accn": "0001193125-11-202586",
              "fy": 2011,
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              "form": "10-Q",
              "filed": "2011-07-29"
            },
            {
              "start": "2011-01-01",
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              "val": 42500000,
              "accn": "0001193125-12-437249",
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-26"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": 42500000,
              "accn": "0001193125-11-286394",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-28"
            },
            {
              "start": "2011-07-01",
              "end": "2011-09-30",
              "val": 17500000,
              "accn": "0001193125-12-437249",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-26",
              "frame": "CY2011Q3"
            },
            {
              "start": "2011-07-01",
              "end": "2011-09-30",
              "val": 17500000,
              "accn": "0001193125-11-286394",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-28"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 55000000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 55000000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 5000000,
              "accn": "0001193125-13-186607",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-30",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 5000000,
              "accn": "0001193125-12-195882",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30"
            },
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": 10000000,
              "accn": "0001193125-12-319119",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-27"
            },
            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": 5000000,
              "accn": "0001193125-12-319119",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-27",
              "frame": "CY2012Q2"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 20000000,
              "accn": "0001193125-12-437249",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-26"
            },
            {
              "start": "2012-07-01",
              "end": "2012-09-30",
              "val": 10000000,
              "accn": "0001193125-12-437249",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-26",
              "frame": "CY2012Q3"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 25000000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-03-31",
              "val": 5000000,
              "accn": "0001193125-13-186607",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-30",
              "frame": "CY2013Q1"
            }
          ]
        }
      },
      "AllowanceForLoanAndLeaseLossesRecoveriesOfBadDebts": {
        "label": "Allowance for Loan and Lease Losses, Recoveries of Bad Debts (Deprecated 2013-01-31)",
        "description": "Reflects a reduction in bad debt expense attributable to collections of loans and lease receivables which had previously been fully or partially charged off as bad debts.",
        "units": {
          "USD": [
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              "start": "2008-12-31",
              "end": "2009-12-31",
              "val": -6500000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2009"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 6900000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2010"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": -6900000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": -13800000,
              "accn": "0001193125-12-195882",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2011Q1"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": 16000000,
              "accn": "0001193125-12-319119",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-27"
            },
            {
              "start": "2011-04-01",
              "end": "2011-06-30",
              "val": 2200000,
              "accn": "0001193125-12-319119",
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              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-27",
              "frame": "CY2011Q2"
            },
            {
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              "accn": "0001193125-12-437249",
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              "form": "10-Q",
              "filed": "2012-10-26"
            },
            {
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              "accn": "0001193125-12-437249",
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-26",
              "frame": "CY2011Q3"
            },
            {
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              "end": "2011-12-31",
              "val": 32900000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011"
            },
            {
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              "end": "2011-12-31",
              "val": -32900000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": -8600000,
              "accn": "0001193125-13-186607",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-30",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": -8600000,
              "accn": "0001193125-12-195882",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30"
            },
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": 21600000,
              "accn": "0001193125-12-319119",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-27"
            },
            {
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              "end": "2012-06-30",
              "val": 13000000,
              "accn": "0001193125-12-319119",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-27",
              "frame": "CY2012Q2"
            },
            {
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              "end": "2012-09-30",
              "val": 26000000,
              "accn": "0001193125-12-437249",
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              "form": "10-Q",
              "filed": "2012-10-26"
            },
            {
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              "end": "2012-09-30",
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              "accn": "0001193125-12-437249",
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-26",
              "frame": "CY2012Q3"
            },
            {
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              "end": "2012-12-31",
              "val": 36700000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-03-31",
              "val": -3900000,
              "accn": "0001193125-13-186607",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-30",
              "frame": "CY2013Q1"
            }
          ]
        }
      },
      "AllowanceForLoanAndLeaseLossesWriteOffs": {
        "label": "Allowance for Loan and Lease Losses, Write-offs",
        "description": "Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.",
        "units": {
          "USD": [
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": 25700000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
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              "val": 50400000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "start": "2009-04-01",
              "end": "2009-06-30",
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              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2009Q2"
            },
            {
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              "end": "2009-09-30",
              "val": 97300000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27"
            },
            {
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              "end": "2009-09-30",
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              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q3"
            },
            {
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              "end": "2009-12-31",
              "val": 132300000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25"
            },
            {
              "start": "2008-12-31",
              "end": "2009-12-31",
              "val": 132300000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-03-31",
              "val": 32700000,
              "accn": "0001193125-11-118294",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-04-29",
              "frame": "CY2010Q1"
            },
            {
              "start": "2010-01-01",
              "end": "2010-06-30",
              "val": 73000000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "start": "2010-01-01",
              "end": "2010-06-30",
              "val": 73000000,
              "accn": "0001193125-11-202586",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-29"
            },
            {
              "start": "2010-04-01",
              "end": "2010-06-30",
              "val": 40300000,
              "accn": "0001193125-10-198108",
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            },
            {
              "end": "2010-09-30",
              "val": 791200000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2010Q3I"
            },
            {
              "end": "2010-12-31",
              "val": 1100000000,
              "accn": "0001193125-11-286394",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-28",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 1100000000,
              "accn": "0001193125-11-202586",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-29"
            },
            {
              "end": "2010-12-31",
              "val": 1100000000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25"
            },
            {
              "end": "2011-03-31",
              "val": 1000000000,
              "accn": "0001193125-11-118294",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-04-29",
              "frame": "CY2011Q1I"
            },
            {
              "end": "2011-06-30",
              "val": 1800000000,
              "accn": "0001193125-11-202586",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-29",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 700000000,
              "accn": "0001193125-11-286394",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-28",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-12-31",
              "val": 1200000000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "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": "2010-12-31",
              "val": 77500000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 77500000,
              "accn": "0001193125-11-286394",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-28"
            },
            {
              "end": "2010-12-31",
              "val": 77500000,
              "accn": "0001193125-11-202586",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-29"
            },
            {
              "end": "2011-06-30",
              "val": 100600000,
              "accn": "0001193125-11-202586",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-29",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 168300000,
              "accn": "0001193125-11-286394",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-28",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-12-31",
              "val": 173800000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 173800000,
              "accn": "0001193125-12-437249",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-26"
            },
            {
              "end": "2011-12-31",
              "val": 173800000,
              "accn": "0001193125-12-319119",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-27"
            },
            {
              "end": "2011-12-31",
              "val": 173800000,
              "accn": "0001193125-12-195882",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30"
            },
            {
              "end": "2011-12-31",
              "val": 173800000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "end": "2012-03-31",
              "val": 188800000,
              "accn": "0001193125-12-195882",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": 205500000,
              "accn": "0001193125-12-319119",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-27",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 262500000,
              "accn": "0001193125-12-437249",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-26",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 242800000,
              "accn": "0001193125-13-186607",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-30",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 242800000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "end": "2013-03-31",
              "val": 230500000,
              "accn": "0001193125-13-186607",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-30",
              "frame": "CY2013Q1I"
            }
          ]
        }
      },
      "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": "2011-12-31",
              "val": 56800000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 56800000,
              "accn": "0001193125-12-437249",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-26"
            },
            {
              "end": "2011-12-31",
              "val": 56800000,
              "accn": "0001193125-12-319119",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-27"
            },
            {
              "end": "2011-12-31",
              "val": 56800000,
              "accn": "0001193125-12-195882",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30"
            },
            {
              "end": "2011-12-31",
              "val": 56800000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "end": "2012-03-31",
              "val": 58600000,
              "accn": "0001193125-12-195882",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": 57200000,
              "accn": "0001193125-12-319119",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-27",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 48900000,
              "accn": "0001193125-12-437249",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-26",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 50100000,
              "accn": "0001193125-13-186607",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-30",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 50100000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "end": "2013-03-31",
              "val": 51400000,
              "accn": "0001193125-13-186607",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-30",
              "frame": "CY2013Q1I"
            }
          ]
        }
      },
      "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": {
          "USD": [
            {
              "start": "2014-01-01",
              "end": "2014-03-31",
              "val": -55300000,
              "accn": "0001193125-14-163062",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-28"
            },
            {
              "start": "2014-01-01",
              "end": "2014-03-31",
              "val": -55300000,
              "accn": "0001193125-14-282591",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-28",
              "frame": "CY2014Q1"
            },
            {
              "start": "2014-04-01",
              "end": "2014-04-30",
              "val": -55300000,
              "accn": "0001193125-14-282591",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-28"
            },
            {
              "start": "2014-04-01",
              "end": "2014-04-30",
              "val": -55300000,
              "accn": "0001193125-14-391869",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-31"
            },
            {
              "start": "2014-04-01",
              "end": "2014-04-30",
              "val": -55300000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2014-04-01",
              "end": "2014-04-30",
              "val": -55300000,
              "accn": "0001193125-15-152967",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-28",
              "frame": "CY2014Q1I"
            }
          ]
        }
      },
      "BusinessCombinationContingentConsiderationLiability": {
        "label": "Business Combination, Contingent Consideration, Liability",
        "description": "Amount of liability recognized arising from contingent consideration in a business combination.",
        "units": {
          "USD": [
            {
              "end": "2012-12-31",
              "val": 50100000,
              "accn": "0001193125-13-316901",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-08-02"
            },
            {
              "end": "2012-12-31",
              "val": 50100000,
              "accn": "0001193125-13-411354",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-25"
            },
            {
              "end": "2012-12-31",
              "val": 50100000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-06-30",
              "val": 52700000,
              "accn": "0001193125-13-316901",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-08-02",
              "frame": "CY2013Q2I"
            },
            {
              "end": "2013-09-30",
              "val": 54000000,
              "accn": "0001193125-13-411354",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-25",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2013-12-31",
              "val": 55400000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "end": "2013-12-31",
              "val": 55400000,
              "accn": "0001193125-14-163062",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-28"
            },
            {
              "end": "2013-12-31",
              "val": 55400000,
              "accn": "0001193125-14-282591",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-28"
            },
            {
              "end": "2013-12-31",
              "val": 55400000,
              "accn": "0001193125-14-391869",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-31"
            },
            {
              "end": "2013-12-31",
              "val": 55400000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013Q4I"
            }
          ]
        }
      },
      "CapitalizedComputerSoftwareAmortization": {
        "label": "Capitalized Computer Software, Amortization (Deprecated 2016-01-31)",
        "description": "For each income statement presented, the amount charged to expense for amortization of capitalized computer software costs.",
        "units": {
          "USD": [
            {
              "start": "2007-01-01",
              "end": "2007-12-31",
              "val": -105700000,
              "accn": "0001193125-10-042685",
              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26",
              "frame": "CY2007"
            },
            {
              "start": "2008-01-01",
              "end": "2008-06-30",
              "val": -52800000,
              "accn": "0001193125-09-162276",
              "fy": 2009,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2009-08-03"
            },
            {
              "start": "2008-01-01",
              "end": "2008-09-30",
              "val": -81900000,
              "accn": "0001193125-09-218667",
              "fy": 2009,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2009-10-30"
            },
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": -115000000,
              "accn": "0001193125-10-042685",
              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
              "end": "2009-03-31",
              "val": -29900000,
              "accn": "0001193125-10-101428",
              "fy": 2010,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2010-04-30",
              "frame": "CY2009Q1"
            },
            {
              "start": "2009-01-01",
              "end": "2009-06-30",
              "val": -60700000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "start": "2009-01-01",
              "end": "2009-06-30",
              "val": -60700000,
              "accn": "0001193125-09-162276",
              "fy": 2009,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2009-08-03"
            },
            {
              "start": "2009-01-01",
              "end": "2009-09-30",
              "val": -94700000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27"
            },
            {
              "start": "2009-01-01",
              "end": "2009-09-30",
              "val": -94700000,
              "accn": "0001193125-09-218667",
              "fy": 2009,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2009-10-30"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": -131800000,
              "accn": "0001193125-10-042685",
              "fy": 2009,
              "fp": "FY",
              "form": "10-K",
              "filed": "2010-02-26",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-03-31",
              "val": -32800000,
              "accn": "0001193125-10-101428",
              "fy": 2010,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2010-04-30",
              "frame": "CY2010Q1"
            },
            {
              "start": "2010-01-01",
              "end": "2010-06-30",
              "val": -66900000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "start": "2010-01-01",
              "end": "2010-09-30",
              "val": -101200000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27"
            }
          ]
        }
      },
      "CapitalizedComputerSoftwareAmortization1": {
        "label": "Capitalized Computer Software, Amortization",
        "description": "Amount of expense for amortization of capitalized computer software costs.",
        "units": {
          "USD": [
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 275300000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 309100000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 309100000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-03-31",
              "val": 83600000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29",
              "frame": "CY2018Q1"
            },
            {
              "start": "2018-01-01",
              "end": "2018-06-30",
              "val": 169100000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": 251800000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 334900000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 334900000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2018"
            },
            {
              "start": "2019-01-01",
              "end": "2019-03-31",
              "val": 84800000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29"
            },
            {
              "start": "2019-01-01",
              "end": "2019-03-31",
              "val": 84800000,
              "accn": "0000073124-20-000179",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-04-27",
              "frame": "CY2019Q1"
            },
            {
              "start": "2019-01-01",
              "end": "2019-06-30",
              "val": 168300000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30"
            },
            {
              "start": "2019-01-01",
              "end": "2019-06-30",
              "val": 168300000,
              "accn": "0000073124-20-000212",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-07-28"
            },
            {
              "start": "2019-01-01",
              "end": "2019-09-30",
              "val": 252600000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28"
            },
            {
              "start": "2019-01-01",
              "end": "2019-09-30",
              "val": 252600000,
              "accn": "0000073124-20-000244",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-10-27"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 339100000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2019"
            },
            {
              "start": "2020-01-01",
              "end": "2020-03-31",
              "val": 91600000,
              "accn": "0000073124-20-000179",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-04-27",
              "frame": "CY2020Q1"
            },
            {
              "start": "2020-01-01",
              "end": "2020-06-30",
              "val": 182700000,
              "accn": "0000073124-20-000212",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-07-28"
            },
            {
              "start": "2020-01-01",
              "end": "2020-09-30",
              "val": 274000000,
              "accn": "0000073124-20-000244",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-10-27"
            }
          ]
        }
      },
      "CapitalLeaseObligations": {
        "label": "Capital Lease Obligations",
        "description": "Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2009-12-31",
              "val": 7800000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 48100000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25"
            },
            {
              "end": "2010-12-31",
              "val": 48100000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 44900000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "end": "2011-12-31",
              "val": 44900000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 41200000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "end": "2012-12-31",
              "val": 41200000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 36900000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "end": "2013-12-31",
              "val": 36900000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 31800000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "end": "2014-12-31",
              "val": 31800000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 29700000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "end": "2015-12-31",
              "val": 29700000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 23000000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28"
            },
            {
              "end": "2016-12-31",
              "val": 23000000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 14400000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27"
            },
            {
              "end": "2017-12-31",
              "val": 14400000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 0,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsDue": {
        "label": "Capital Leases, Future Minimum Payments Due",
        "description": "Amount of minimum lease payments for capital leases.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 64200000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 56400000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 48300000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 39900000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 34800000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 25800000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 15400000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            }
          ]
        }
      },
      "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": "2010-12-31",
              "val": 7700000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 7900000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 8100000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 8400000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 8300000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 9100000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 9300000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 8400000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            }
          ]
        }
      },
      "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": "2010-12-31",
              "val": 8300000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 8000000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 8200000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 8400000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 8700000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": -1700000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 0,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 0,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            }
          ]
        }
      },
      "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": "2010-12-31",
              "val": 8400000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 8200000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 8000000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 8200000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 8400000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 8700000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": -1700000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 0,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            }
          ]
        }
      },
      "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": "2010-12-31",
              "val": 8100000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 8400000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 8300000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 8000000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 8200000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 9500000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 8700000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": -1700000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            }
          ]
        }
      },
      "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": "2010-12-31",
              "val": 7900000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 8100000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 8400000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 8300000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 8000000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 9200000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 9500000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 8700000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            }
          ]
        }
      },
      "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": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 31000000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 23600000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 15400000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 7000000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": -1700000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 0,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 0,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 0,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            }
          ]
        }
      },
      "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.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 23300000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 19300000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 15200000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 11400000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 8100000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 5100000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 2800000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 1000000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsNetMinimumPayments": {
        "label": "Capital Leases, Future Minimum Payments, Net Minimum Payments (Deprecated 2012-01-31)",
        "description": "The total contractually required rental payments on capitalized leases net of deductions for: (i) executory costs, including any profit thereon, included in the minimum lease payments and (ii) the amount of imputed interest necessary to reduce the net minimum lease payments to present value.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 71400000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "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": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 48100000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 44900000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 41200000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 36900000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 31800000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 29700000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 23000000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 14400000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsReceivableCurrent": {
        "label": "Capital Leases, Future Minimum Payments Receivable, Next Twelve Months",
        "description": "Amount of minimum lease payments to be received by the lessor for capital leases 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": 33900000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 48600000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 44700000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 48400000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 14800000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 11300000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 11200000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 3700000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsReceivableInFiveYears": {
        "label": "Capital Leases, Future Minimum Payments, Receivable in Five Years",
        "description": "Amount of minimum lease payments to be received by the lessor for capital leases 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": 15600000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 26700000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 19100000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 17900000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 4200000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 2100000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 0,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 0,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsReceivableInFourYears": {
        "label": "Capital Leases, Future Minimum Payments, Receivable in Four Years",
        "description": "Amount of minimum lease payments to be received by the lessor for capital leases 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": 21400000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 29100000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 27000000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 29800000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 9000000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 3900000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 2100000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 0,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsReceivableInThreeYears": {
        "label": "Capital Leases, Future Minimum Payments, Receivable in Three Years",
        "description": "Amount of minimum lease payments to be received by the lessor for capital leases 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": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 39500000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 30400000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 37600000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 11200000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 9100000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 3900000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 2100000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsReceivableInTwoYears": {
        "label": "Capital Leases, Future Minimum Payments, Receivable in Two Years",
        "description": "Amount of minimum lease payments to be received by the lessor for capital leases 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": 28900000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 45700000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 40500000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 40400000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 11500000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 11200000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 9000000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 3700000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "CapitalLeasesNetInvestmentInDirectFinancingLeases": {
        "label": "Capital Leases, Net Investment in Direct Financing Leases",
        "description": "The net investment in direct financing leases as of the balance sheet date consisting of: (a) minimum lease payments due on direct financing leases, (b) unguaranteed residual value, and (c) any unamortized initial direct costs; less: (i) executory costs, (ii) unearned income, and (iii) the accumulated allowance for uncollectible minimum lease payments.",
        "units": {
          "USD": [
            {
              "end": "2009-12-31",
              "val": 234700000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 281400000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25"
            },
            {
              "end": "2010-12-31",
              "val": 281400000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 264300000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "end": "2011-12-31",
              "val": 264300000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 361400000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "end": "2012-12-31",
              "val": 361400000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 303900000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "end": "2013-12-31",
              "val": 303900000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 368700000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "end": "2014-12-31",
              "val": 368700000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 155000000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "end": "2015-12-31",
              "val": 155000000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 110400000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28"
            },
            {
              "end": "2016-12-31",
              "val": 110400000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 98200000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27"
            },
            {
              "end": "2017-12-31",
              "val": 98200000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 33900000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "CapitalLeasesNetInvestmentInDirectFinancingLeasesDeferredIncome": {
        "label": "Capital Leases, Net Investment in Direct Financing Leases, Deferred Income",
        "description": "The remaining (unamortized) difference between the gross investment in a direct financing lease and the cost or carrying amount, if different, of the leased property as of the balance sheet date.",
        "units": {
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            {
              "end": "2009-12-31",
              "val": 38900000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 44900000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25"
            },
            {
              "end": "2010-12-31",
              "val": 44900000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 44100000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "end": "2011-12-31",
              "val": 44100000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 43500000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "end": "2012-12-31",
              "val": 43500000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 31100000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "end": "2013-12-31",
              "val": 31100000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 39100000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "end": "2014-12-31",
              "val": 39100000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 9400000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "end": "2015-12-31",
              "val": 9400000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 3500000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28"
            },
            {
              "end": "2016-12-31",
              "val": 3500000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 1500000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27"
            },
            {
              "end": "2017-12-31",
              "val": 1500000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 0,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "CapitalLeasesNetInvestmentInDirectFinancingLeasesInitialDirectCosts": {
        "label": "Capital Leases, Net Investment in Direct Financing Leases, Initial Direct Costs",
        "description": "Remaining unamortized costs as of the balance sheet date that were essential to acquiring the lease, and that would not otherwise have been incurred without the lease agreement, including evaluating the lessee's credit condition, guarantees, and collateral and costs incurred negotiating, processing, and closing the lease agreement.",
        "units": {
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              "end": "2009-12-31",
              "val": 1000000,
              "accn": "0001193125-11-047592",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 1800000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25"
            },
            {
              "end": "2010-12-31",
              "val": 1800000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 2900000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "end": "2011-12-31",
              "val": 2900000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 3500000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "end": "2012-12-31",
              "val": 3500000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 2500000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "end": "2013-12-31",
              "val": 2500000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 3600000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "end": "2014-12-31",
              "val": 3600000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 1300000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "end": "2015-12-31",
              "val": 1300000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 1000000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28"
            },
            {
              "end": "2016-12-31",
              "val": 1000000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 700000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27"
            },
            {
              "end": "2017-12-31",
              "val": 700000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 300000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26"
            },
            {
              "end": "2018-12-31",
              "val": 300000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "CapitalLeasesNetInvestmentInDirectFinancingLeasesMinimumPaymentsToBeReceived": {
        "label": "Capital Leases, Net Investment in Direct Financing Leases, Minimum Payments to be Received",
        "description": "Amount of remaining payments as of the balance sheet date that lessees are obligated to make or can be required to make under direct financing leases, including any guarantee of residual value and executory costs. The amount also includes any guaranteed rental payments by an unrelated third-party provided that are financially capable of making such payments.",
        "units": {
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              "end": "2009-12-31",
              "val": 133900000,
              "accn": "0001193125-11-047592",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 148400000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25"
            },
            {
              "end": "2010-12-31",
              "val": 148400000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 156300000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "end": "2011-12-31",
              "val": 156300000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 239200000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
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              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "end": "2012-12-31",
              "val": 239200000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 189400000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "end": "2013-12-31",
              "val": 189400000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 195400000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "end": "2014-12-31",
              "val": 195400000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 53800000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "end": "2015-12-31",
              "val": 53800000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
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              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28"
            },
            {
              "end": "2016-12-31",
              "val": 37600000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 26600000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27"
            },
            {
              "end": "2017-12-31",
              "val": 26600000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 9800000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "CapitalLeasesNetInvestmentInDirectFinancingLeasesUnguaranteedResidualValuesOfLeasedProperty": {
        "label": "Capital Leases, Net Investment in Direct Financing Leases, Unguaranteed Residual Values of Leased Property",
        "description": "The estimate of the lease property's economic value at the end of the direct financing lease term excluding any amounts guaranteed by either the lessee or a third-party.",
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              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2009Q4I"
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            {
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              "val": 176100000,
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              "form": "10-K",
              "filed": "2011-02-25"
            },
            {
              "end": "2010-12-31",
              "val": 176100000,
              "accn": "0001193125-12-078391",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 149200000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "end": "2011-12-31",
              "val": 149200000,
              "accn": "0001193125-13-076407",
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              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
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            {
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              "filed": "2013-02-26"
            },
            {
              "end": "2012-12-31",
              "val": 162200000,
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              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 143100000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "end": "2013-12-31",
              "val": 143100000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 208800000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "end": "2014-12-31",
              "val": 208800000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 109300000,
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            {
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            {
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            {
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          ]
        }
      },
      "CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths": {
        "label": "Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months",
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          ]
        }
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          ]
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            {
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            {
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            {
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            {
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        }
      },
      "ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights": {
        "label": "Class of Warrant or Right, Exercise Price of Warrants or Rights (Deprecated 2014-01-31)",
        "description": "Exercise price per share or per unit of warrants or rights outstanding.",
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          ]
        }
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      "ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights": {
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            {
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          ]
        }
      },
      "CollateralAlreadyPostedAggregateFairValue": {
        "label": "Collateral Already Posted, Aggregate Fair Value",
        "description": "The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.",
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            {
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            {
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            {
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            {
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            {
              "end": "2022-12-31",
              "val": 122600000,
              "accn": "0000073124-23-000049",
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              "filed": "2023-02-28"
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            {
              "end": "2022-12-31",
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            {
              "end": "2023-12-31",
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              "accn": "0000073124-25-000105",
              "fy": 2024,
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            {
              "end": "2024-12-31",
              "val": 0,
              "accn": "0000073124-25-000105",
              "fy": 2024,
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              "form": "10-K",
              "filed": "2025-02-24",
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      },
      "DeferredTaxLiabilitiesUndistributedForeignEarnings": {
        "label": "Deferred Tax Liabilities, Undistributed Foreign Earnings",
        "description": "Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiary and other recognized entity not within country of domicile. Includes, but is not limited to, other basis differences.",
        "units": {
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              "val": 132500000,
              "accn": "0001193125-11-047592",
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            {
              "end": "2011-12-31",
              "val": 154500000,
              "accn": "0001193125-12-078391",
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              "filed": "2018-02-27",
              "frame": "CY2017"
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            {
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              "val": 0.06,
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              "filed": "2019-02-26",
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            {
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              "val": 0.0525,
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              "form": "10-K",
              "filed": "2020-02-25",
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            {
              "start": "2020-01-01",
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              "fy": 2020,
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              "form": "10-K",
              "filed": "2021-02-23",
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            {
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              "end": "2021-12-31",
              "val": 0.0525,
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              "form": "10-K",
              "filed": "2022-02-28",
              "frame": "CY2021"
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            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 0.0725,
              "accn": "0000073124-23-000049",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-28",
              "frame": "CY2022"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 0.0725,
              "accn": "0000073124-24-000073",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-27",
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            {
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              "end": "2024-12-31",
              "val": 0.0725,
              "accn": "0000073124-25-000105",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-24",
              "frame": "CY2024"
            },
            {
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              "val": 0.0725,
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              "form": "10-K",
              "filed": "2026-02-24",
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        }
      },
      "DefinedBenefitPlanBenefitObligationPaymentForSettlement": {
        "label": "Defined Benefit Plan, Benefit Obligation, Payment for Settlement",
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        "units": {
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              "end": "2021-09-30",
              "val": 24500000,
              "accn": "0000073124-21-000272",
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              "form": "10-Q",
              "filed": "2021-10-26"
            },
            {
              "start": "2021-07-01",
              "end": "2021-09-30",
              "val": 6900000,
              "accn": "0000073124-21-000272",
              "fy": 2021,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-10-26",
              "frame": "CY2021Q3"
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          ]
        }
      },
      "DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation": {
        "label": "Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation (Deprecated 2012-01-31)",
        "description": "The effect of a one-percentage-point decrease in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits.",
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              "end": "2010-12-31",
              "val": -2000000,
              "accn": "0001193125-11-047592",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010"
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          ]
        }
      },
      "DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnAccumulatedPostretirementBenefitObligation1": {
        "label": "Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation",
        "description": "Amount of decrease in accumulated postretirement benefit obligation from one-percentage-point decrease in assumed health care cost trend rate.",
        "units": {
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              "end": "2012-12-31",
              "val": 700000,
              "accn": "0001193125-13-076407",
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              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 700000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
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              "filed": "2014-02-26",
              "frame": "CY2013"
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            {
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              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014"
            },
            {
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              "val": 800000,
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              "fy": 2015,
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              "form": "10-K",
              "filed": "2016-02-29",
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            },
            {
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              "accn": "0000073124-17-000117",
              "fy": 2016,
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              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016"
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            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 700000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017"
            }
          ]
        }
      },
      "DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents": {
        "label": "Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components (Deprecated 2012-01-31)",
        "description": "The effect of a one-percentage- point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs.",
        "units": {
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          ]
        }
      },
      "DefinedBenefitPlanEffectOfOnePercentagePointDecreaseOnServiceAndInterestCostComponents1": {
        "label": "Defined Benefit Plan, Effect of One Percentage Point Decrease on Service and Interest Cost Components",
        "description": "Amount of decrease in service and interest cost components of net periodic postretirement benefit cost from one-percentage-point decrease in assumed health care cost trend rate.",
        "units": {
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              "form": "10-K",
              "filed": "2026-02-24",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 1400000000,
              "accn": "0000073124-26-000016",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-24",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "FederalHomeLoanBankAdvancesMaturitiesSummary": {
        "label": "Federal Home Loan Bank, Advances (Deprecated 2013-01-31)",
        "description": "Amount of federal home loan bank advances. Advances are loans from the federal home loan bank system to a member (shareholder).",
        "units": {
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              "end": "2009-12-31",
              "val": 1697500000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 1532500000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 1532500000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25"
            },
            {
              "end": "2011-12-31",
              "val": 1055000000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 1055000000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "end": "2012-12-31",
              "val": 335000000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            }
          ]
        }
      },
      "FederalHomeLoanBankStock": {
        "label": "Federal Home Loan Bank Stock",
        "description": "Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).",
        "units": {
          "USD": [
            {
              "end": "2009-12-31",
              "val": 65800000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 66600000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "FederalReserveBankStock": {
        "label": "Federal Reserve Bank Stock",
        "description": "Federal Reserve Bank stock represents an equity interest in the Federal Reserve Bank. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).",
        "units": {
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            {
              "end": "2013-12-31",
              "val": 12911500000,
              "accn": "0001193125-14-391869",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-31"
            },
            {
              "end": "2013-12-31",
              "val": 12911500000,
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              "filed": "2015-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-09-30",
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              "accn": "0001193125-14-391869",
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              "fp": "Q3",
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              "frame": "CY2014Q3I"
            },
            {
              "end": "2014-12-31",
              "val": 17386300000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "end": "2014-12-31",
              "val": 17386300000,
              "accn": "0001193125-15-152967",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-28"
            },
            {
              "end": "2014-12-31",
              "val": 17386300000,
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              "fp": "Q2",
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            {
              "end": "2014-12-31",
              "val": 17386300000,
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              "filed": "2015-10-28"
            },
            {
              "end": "2014-12-31",
              "val": 17386300000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-03-31",
              "val": 8804200000,
              "accn": "0001193125-15-152967",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-28",
              "frame": "CY2015Q1I"
            },
            {
              "end": "2015-06-30",
              "val": 17488700000,
              "accn": "0001193125-15-268306",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-29",
              "frame": "CY2015Q2I"
            },
            {
              "end": "2015-09-30",
              "val": 22252000000,
              "accn": "0000073124-15-000217",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-28",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2015-12-31",
              "val": 16398500000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "end": "2015-12-31",
              "val": 16398500000,
              "accn": "0000073124-16-000378",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-04-28"
            },
            {
              "end": "2015-12-31",
              "val": 0,
              "accn": "0000073124-16-000473",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-26"
            },
            {
              "end": "2015-12-31",
              "val": 0,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-03-31",
              "val": 14415300000,
              "accn": "0000073124-16-000378",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-04-28"
            },
            {
              "end": "2016-03-31",
              "val": 0,
              "accn": "0000073124-17-000190",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-02",
              "frame": "CY2016Q1I"
            }
          ]
        }
      },
      "FeesAndCommissionsMortgageBanking": {
        "label": "Fees and Commissions, Mortgage Banking (Deprecated 2018-01-31)",
        "description": "The noninterest income derived from mortgage banking activities (fees and commissions), excluding fees earned from servicing third-party assets.",
        "units": {
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              "end": "2010-12-31",
              "val": 60300000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2010"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 68900000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 68900000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 64500000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 64500000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 64500000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 61900000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 61900000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 61900000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 62700000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 62700000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 62700000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 59100000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 59100000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 59100000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 56600000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 56600000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 50700000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017"
            }
          ]
        }
      },
      "FeesAndCommissionsOther": {
        "label": "Fees and Commissions, Other (Deprecated 2018-01-31)",
        "description": "Amount of fee and commission revenue classified as other.",
        "units": {
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              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 28700000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2010"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 34300000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 34300000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 35400000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 35400000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 35400000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 53700000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 53700000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 53700000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 41200000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 41200000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 41200000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 139800000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 139800000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 139800000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 134000000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 134000000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 58200000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017"
            }
          ]
        }
      },
      "FinanceLeaseLiabilityPaymentsDueNextTwelveMonths": {
        "label": "Finance Lease, Liability, to be Paid, Year One",
        "description": "Amount of lessee's undiscounted obligation for lease payment for finance 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": {
          "USD": [
            {
              "end": "2019-12-31",
              "val": 3700000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2019Q4I"
            }
          ]
        }
      },
      "FinanceLeaseLiabilityPaymentsDueYearFive": {
        "label": "Finance Lease, Liability, to be Paid, Year Five",
        "description": "Amount of lessee's undiscounted obligation for lease payment for finance lease 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).",
        "units": {
          "USD": [
            {
              "end": "2019-12-31",
              "val": 0,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2019Q4I"
            }
          ]
        }
      },
      "FinanceLeaseLiabilityPaymentsDueYearFour": {
        "label": "Finance Lease, Liability, to be Paid, Year Four",
        "description": "Amount of lessee's undiscounted obligation for lease payment for finance lease 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).",
        "units": {
          "USD": [
            {
              "end": "2019-12-31",
              "val": 0,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2019Q4I"
            }
          ]
        }
      },
      "FinanceLeaseLiabilityPaymentsDueYearThree": {
        "label": "Finance Lease, Liability, to be Paid, Year Three",
        "description": "Amount of lessee's undiscounted obligation for lease payment for finance lease 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": [
            {
              "end": "2019-12-31",
              "val": 0,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2019Q4I"
            }
          ]
        }
      },
      "FinanceLeaseLiabilityPaymentsDueYearTwo": {
        "label": "Finance Lease, Liability, to be Paid, Year Two",
        "description": "Amount of lessee's undiscounted obligation for lease payment for finance lease 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": {
          "USD": [
            {
              "end": "2019-12-31",
              "val": 2100000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2019Q4I"
            }
          ]
        }
      },
      "FinancialInstrumentsOwnedAndPledgedAsCollateralAmountEligibleToBeRepledgedByCounterparty": {
        "label": "Financial Instruments Owned and Pledged as Collateral, Amount Eligible to be Repledged by Counterparty",
        "description": "Fair value of financial instrument held by the entity for its own account (proprietary securities) for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions where counterparty has the right to re-pledge such.",
        "units": {
          "USD": [
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              "frame": "CY2013Q3I"
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            {
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              "accn": "0001193125-14-069870",
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              "frame": "CY2014Q3I"
            },
            {
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              "frame": "CY2014Q4I"
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            {
              "end": "2015-03-31",
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              "accn": "0001193125-15-152967",
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              "fp": "Q1",
              "form": "10-Q",
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            {
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            {
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            {
              "end": "2012-09-30",
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            {
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            {
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              "form": "10-Q",
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            },
            {
              "end": "2012-09-30",
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              "accn": "0001193125-12-437249",
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-26",
              "frame": "CY2012Q3I"
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            {
              "end": "2012-12-31",
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              "accn": "0001193125-13-076407",
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              "filed": "2013-04-30",
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            {
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              "form": "10-Q",
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              "accn": "0001193125-15-152967",
              "fy": 2015,
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              "form": "10-Q",
              "filed": "2015-04-28",
              "frame": "CY2015Q1I"
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              "accn": "0001193125-15-268306",
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              "form": "10-Q",
              "filed": "2015-07-29",
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              "frame": "CY2015Q3I"
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            {
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              "form": "10-K",
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            {
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              "filed": "2016-07-27",
              "frame": "CY2016Q2I"
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              "accn": "0000073124-16-000473",
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              "fp": "Q3",
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              "frame": "CY2016Q3I"
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              "accn": "0001193125-12-319119",
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            },
            {
              "end": "2012-09-30",
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              "accn": "0001193125-12-437249",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-26",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 20800000,
              "accn": "0001193125-13-076407",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
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              "accn": "0001193125-13-186607",
              "fy": 2013,
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              "form": "10-Q",
              "filed": "2013-04-30",
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              "form": "10-Q",
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              "frame": "CY2013Q3I"
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              "accn": "0001193125-14-069870",
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              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
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              "accn": "0001193125-14-163062",
              "fy": 2014,
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              "form": "10-Q",
              "filed": "2014-04-28",
              "frame": "CY2014Q1I"
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              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-28",
              "frame": "CY2014Q2I"
            },
            {
              "end": "2014-09-30",
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              "accn": "0001193125-14-391869",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-31",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2014-12-31",
              "val": 8800000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
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              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
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              "accn": "0001193125-15-152967",
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              "form": "10-Q",
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            {
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              "val": 8500000,
              "accn": "0001193125-15-268306",
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              "form": "10-Q",
              "filed": "2015-07-29",
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            },
            {
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              "filed": "2015-10-28",
              "frame": "CY2015Q3I"
            },
            {
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              "accn": "0000073124-16-000324",
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              "fp": "FY",
              "form": "10-K",
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              "frame": "CY2015Q4I"
            },
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            {
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              "val": 9000000,
              "accn": "0000073124-16-000415",
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              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-27",
              "frame": "CY2016Q2I"
            },
            {
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              "val": 9000000,
              "accn": "0000073124-16-000473",
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-26",
              "frame": "CY2016Q3I"
            },
            {
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              "form": "10-K",
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        }
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      "FiniteLivedIntangibleAssetsGross": {
        "label": "Finite-Lived Intangible Assets, Gross",
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              "accn": "0001193125-11-202586",
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              "form": "10-Q",
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            },
            {
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              "accn": "0001193125-11-286394",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-28"
            },
            {
              "end": "2010-12-31",
              "val": 164200000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2010Q4I"
            },
            {
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              "start": "2026-01-01",
              "end": "2026-03-31",
              "val": 87700000,
              "accn": "0000073124-26-000035",
              "fy": 2026,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2026-04-30",
              "frame": "CY2026Q1"
            },
            {
              "start": "2026-01-01",
              "end": "2026-06-30",
              "val": 184800000,
              "accn": "0000073124-26-000047",
              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-30"
            },
            {
              "start": "2026-04-01",
              "end": "2026-06-30",
              "val": 97100000,
              "accn": "0000073124-26-000047",
              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-30",
              "frame": "CY2026Q2"
            }
          ]
        }
      },
      "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": 8400000,
              "accn": "0001193125-11-202586",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-29"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": 5000000,
              "accn": "0001193125-11-286394",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-28"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 15900000,
              "accn": "0001193125-12-195882",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2012Q1"
            }
          ]
        }
      },
      "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": "2009-12-31",
              "end": "2010-12-31",
              "val": 3800000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": 3800000,
              "accn": "0001193125-11-118294",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-04-29",
              "frame": "CY2011Q1"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": 8300000,
              "accn": "0001193125-11-202586",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-29"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": 11800000,
              "accn": "0001193125-11-286394",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-28"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 9100000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011"
            }
          ]
        }
      },
      "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": "2009-12-31",
              "end": "2010-12-31",
              "val": 11200000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": 11500000,
              "accn": "0001193125-11-118294",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-04-29",
              "frame": "CY2011Q1"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": 15900000,
              "accn": "0001193125-11-202586",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-29"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": 20700000,
              "accn": "0001193125-11-286394",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-28"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 11700000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 9200000,
              "accn": "0001193125-12-195882",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2012Q1"
            },
            {
              "start": "2013-12-31",
              "end": "2014-12-30",
              "val": 10300000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2014"
            },
            {
              "start": "2013-12-25",
              "end": "2014-12-31",
              "val": 10000000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            }
          ]
        }
      },
      "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": "2009-12-31",
              "end": "2010-12-31",
              "val": 11800000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-30",
              "val": 10900000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 20800000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 10600000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 20900000,
              "accn": "0001193125-12-195882",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2012Q1"
            }
          ]
        }
      },
      "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": "2009-12-31",
              "end": "2010-12-31",
              "val": 11300000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": 11600000,
              "accn": "0001193125-11-118294",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-04-29",
              "frame": "CY2011Q1"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": 16000000,
              "accn": "0001193125-11-202586",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-29"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": 20800000,
              "accn": "0001193125-11-286394",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-28"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 20400000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 11800000,
              "accn": "0001193125-12-195882",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2012Q1"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-24",
              "val": 10100000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "start": "2012-12-31",
              "end": "2013-12-30",
              "val": 10400000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2013"
            }
          ]
        }
      },
      "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": "2009-12-31",
              "end": "2010-12-31",
              "val": 11600000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": 11800000,
              "accn": "0001193125-11-118294",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-04-29",
              "frame": "CY2011Q1"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": 16300000,
              "accn": "0001193125-11-202586",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-29"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": 21000000,
              "accn": "0001193125-11-286394",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-28"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 20500000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 20800000,
              "accn": "0001193125-12-195882",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2012Q1"
            },
            {
              "start": "2011-12-31",
              "end": "2012-12-30",
              "val": 10700000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 10300000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2012"
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          ]
        }
      },
      "GainLossOnCashFlowHedgeIneffectivenessNet": {
        "label": "Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net",
        "description": "The net gain (loss) recognized in earnings during the reporting period representing the amount of the cash flow hedges' ineffectiveness.",
        "units": {
          "USD": [
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              "start": "2012-01-01",
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              "val": 0,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2012"
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            {
              "start": "2013-01-01",
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              "val": 0,
              "accn": "0001193125-14-282591",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-28"
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            {
              "start": "2013-04-01",
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              "val": 0,
              "accn": "0001193125-14-282591",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
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            {
              "start": "2013-01-01",
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              "accn": "0001193125-14-391869",
              "fy": 2014,
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            {
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              "accn": "0001193125-14-391869",
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              "fp": "FY",
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              "accn": "0001193125-15-152967",
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            {
              "start": "2014-01-01",
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            {
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            {
              "start": "2015-01-01",
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              "accn": "0000073124-15-000217",
              "fy": 2015,
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              "form": "10-Q",
              "filed": "2015-10-28"
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            {
              "start": "2015-01-01",
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              "val": 0,
              "accn": "0000073124-16-000473",
              "fy": 2016,
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              "fy": 2015,
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              "form": "10-Q",
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            {
              "start": "2015-07-01",
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              "accn": "0000073124-16-000473",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-26",
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            {
              "start": "2015-01-01",
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              "fy": 2015,
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            {
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              "val": 41200000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-03-31",
              "val": 39100000,
              "accn": "0000073124-17-000190",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-02",
              "frame": "CY2017Q1I"
            },
            {
              "end": "2017-06-30",
              "val": 37100000,
              "accn": "0000073124-17-000251",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-07-27",
              "frame": "CY2017Q2I"
            },
            {
              "end": "2017-09-30",
              "val": 36300000,
              "accn": "0000073124-17-000310",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-10-26",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2017-12-31",
              "val": 35500000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27"
            },
            {
              "end": "2017-12-31",
              "val": 35500000,
              "accn": "0000073124-18-000206",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-05-04"
            },
            {
              "end": "2017-12-31",
              "val": 35500000,
              "accn": "0000073124-18-000259",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-07-30"
            },
            {
              "end": "2017-12-31",
              "val": 35500000,
              "accn": "0000073124-18-000297",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-29"
            },
            {
              "end": "2017-12-31",
              "val": 35500000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-03-31",
              "val": 30200000,
              "accn": "0000073124-18-000206",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-05-04",
              "frame": "CY2018Q1I"
            },
            {
              "end": "2018-06-30",
              "val": 20400000,
              "accn": "0000073124-18-000259",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-07-30",
              "frame": "CY2018Q2I"
            },
            {
              "end": "2018-09-30",
              "val": 19700000,
              "accn": "0000073124-18-000297",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-29",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2018-12-31",
              "val": 13200000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26"
            },
            {
              "end": "2018-12-31",
              "val": 13200000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29"
            },
            {
              "end": "2018-12-31",
              "val": 13200000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30"
            },
            {
              "end": "2018-12-31",
              "val": 13200000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28"
            },
            {
              "end": "2018-12-31",
              "val": 13200000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-03-31",
              "val": 13300000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 13100000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 13300000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 14100000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2019Q4I"
            }
          ]
        }
      },
      "LoansAndLeasesReceivableForeignNetOfDeferredIncome": {
        "label": "Loans and Leases Receivable, Foreign, Net of Deferred Income (Deprecated 2016-01-31)",
        "description": "Reflects the net carrying amount of foreign loans and leases held in portfolio, after deducting deferred income, but before deducting the allowance for losses on foreign loans and leases.",
        "units": {
          "USD": [
            {
              "end": "2009-06-30",
              "val": 937600000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2009Q2I"
            },
            {
              "end": "2009-09-30",
              "val": 804400000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q3I"
            },
            {
              "end": "2009-12-31",
              "val": 728500000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2009-12-31",
              "val": 728500000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "end": "2010-06-30",
              "val": 1385500000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2010Q2I"
            },
            {
              "end": "2010-09-30",
              "val": 864000000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2010Q3I"
            }
          ]
        }
      },
      "LoansAndLeasesReceivableGrossCarryingAmount": {
        "label": "Loans and Leases Receivable, Gross",
        "description": "Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.",
        "units": {
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            {
              "end": "2015-12-31",
              "val": 33180900000,
              "accn": "0000073124-16-000378",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-04-28"
            },
            {
              "end": "2015-12-31",
              "val": 33180900000,
              "accn": "0000073124-16-000415",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-27"
            },
            {
              "end": "2015-12-31",
              "val": 33180900000,
              "accn": "0000073124-16-000473",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-26"
            },
            {
              "end": "2015-12-31",
              "val": 33180900000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-03-31",
              "val": 34144900000,
              "accn": "0000073124-16-000378",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-04-28",
              "frame": "CY2016Q1I"
            },
            {
              "end": "2016-06-30",
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              "accn": "0000073124-16-000415",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-27",
              "frame": "CY2016Q2I"
            },
            {
              "end": "2016-09-30",
              "val": 33423000000,
              "accn": "0000073124-16-000473",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-26",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2016-12-31",
              "val": 33822100000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28"
            },
            {
              "end": "2016-12-31",
              "val": 33822100000,
              "accn": "0000073124-17-000190",
              "fy": 2017,
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            },
            {
              "end": "2016-12-31",
              "val": 33822100000,
              "accn": "0000073124-17-000251",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-07-27"
            },
            {
              "end": "2016-12-31",
              "val": 33822100000,
              "accn": "0000073124-17-000310",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-10-26"
            },
            {
              "end": "2016-12-31",
              "val": 33822100000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-03-31",
              "val": 33471800000,
              "accn": "0000073124-17-000190",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-02",
              "frame": "CY2017Q1I"
            },
            {
              "end": "2017-06-30",
              "val": 33499000000,
              "accn": "0000073124-17-000251",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-07-27",
              "frame": "CY2017Q2I"
            },
            {
              "end": "2017-09-30",
              "val": 33336100000,
              "accn": "0000073124-17-000310",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-10-26",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2017-12-31",
              "val": 32592200000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27"
            },
            {
              "end": "2017-12-31",
              "val": 32592200000,
              "accn": "0000073124-18-000206",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-05-04"
            },
            {
              "end": "2017-12-31",
              "val": 32592200000,
              "accn": "0000073124-18-000259",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-07-30"
            },
            {
              "end": "2017-12-31",
              "val": 32592200000,
              "accn": "0000073124-18-000297",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-29"
            },
            {
              "end": "2017-12-31",
              "val": 32592200000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-03-31",
              "val": 32108900000,
              "accn": "0000073124-18-000206",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-05-04",
              "frame": "CY2018Q1I"
            },
            {
              "end": "2018-06-30",
              "val": 32473200000,
              "accn": "0000073124-18-000259",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-07-30",
              "frame": "CY2018Q2I"
            },
            {
              "end": "2018-09-30",
              "val": 31354000000,
              "accn": "0000073124-18-000297",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-29",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2018-12-31",
              "val": 32490000000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26"
            },
            {
              "end": "2018-12-31",
              "val": 32490000000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29"
            },
            {
              "end": "2018-12-31",
              "val": 32490000000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30"
            },
            {
              "end": "2018-12-31",
              "val": 32490000000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28"
            },
            {
              "end": "2018-12-31",
              "val": 32490000000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-03-31",
              "val": 30620600000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 30982300000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 30844200000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 31409600000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2019Q4I"
            }
          ]
        }
      },
      "LoansAndLeasesReceivableImpairedAllowanceForLoanLosses": {
        "label": "Loans and Leases Receivable, Impaired, Allowance for Loan Losses (Deprecated 2011-01-31)",
        "description": "Reflects amount of allowance for credit losses pertaining to impaired loans.",
        "units": {
          "USD": [
            {
              "end": "2009-06-30",
              "val": 39700000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2009Q2I"
            },
            {
              "end": "2009-09-30",
              "val": 45700000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q3I"
            },
            {
              "end": "2009-12-31",
              "val": 43800000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2009-12-31",
              "val": 43800000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "end": "2010-06-30",
              "val": 51800000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2010Q2I"
            },
            {
              "end": "2010-09-30",
              "val": 48100000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2010Q3I"
            }
          ]
        }
      },
      "LoansAndLeasesReceivableImpairedAverageInvestment": {
        "label": "Loans and Leases Receivable, Impaired, Average Investment (Deprecated 2011-01-31)",
        "description": "Reflects the average recorded investment in impaired loans during each period.",
        "units": {
          "USD": [
            {
              "start": "2009-01-01",
              "end": "2009-06-30",
              "val": 176200000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "start": "2009-01-01",
              "end": "2009-09-30",
              "val": 198800000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 193800000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009"
            },
            {
              "start": "2009-07-01",
              "end": "2009-12-31",
              "val": 193800000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "start": "2010-01-01",
              "end": "2010-06-30",
              "val": 230500000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "start": "2010-01-01",
              "end": "2010-09-30",
              "val": 257600000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27"
            }
          ]
        }
      },
      "LoansAndLeasesReceivableImpairedCommitmentToLend": {
        "label": "Financing Receivable, Troubled Debt Restructuring, Commitment to Lend",
        "description": "Amount of unfunded portion of contractual agreement to lend funds to borrower for financing receivable modified as troubled debt restructuring.",
        "units": {
          "USD": [
            {
              "end": "2019-12-31",
              "val": 8200000,
              "accn": "0000073124-20-000179",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-04-27"
            },
            {
              "end": "2019-12-31",
              "val": 8200000,
              "accn": "0000073124-20-000212",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-07-28"
            },
            {
              "end": "2019-12-31",
              "val": 8200000,
              "accn": "0000073124-20-000244",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-10-27"
            },
            {
              "end": "2019-12-31",
              "val": 8200000,
              "accn": "0000073124-21-000071",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-23",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-03-31",
              "val": 11700000,
              "accn": "0000073124-20-000179",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-04-27",
              "frame": "CY2020Q1I"
            },
            {
              "end": "2020-06-30",
              "val": 10400000,
              "accn": "0000073124-20-000212",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-07-28",
              "frame": "CY2020Q2I"
            },
            {
              "end": "2020-09-30",
              "val": 11000000,
              "accn": "0000073124-20-000244",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-10-27",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2020-12-31",
              "val": 10400000,
              "accn": "0000073124-21-000071",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-23"
            },
            {
              "end": "2020-12-31",
              "val": 10400000,
              "accn": "0000073124-21-000185",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2021-04-27"
            },
            {
              "end": "2020-12-31",
              "val": 10400000,
              "accn": "0000073124-21-000239",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2021-07-27"
            },
            {
              "end": "2020-12-31",
              "val": 10400000,
              "accn": "0000073124-21-000272",
              "fy": 2021,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-10-26"
            },
            {
              "end": "2020-12-31",
              "val": 10400000,
              "accn": "0000073124-22-000071",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-28",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-03-31",
              "val": 8900000,
              "accn": "0000073124-21-000185",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2021-04-27",
              "frame": "CY2021Q1I"
            },
            {
              "end": "2021-06-30",
              "val": 9900000,
              "accn": "0000073124-21-000239",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2021-07-27",
              "frame": "CY2021Q2I"
            },
            {
              "end": "2021-09-30",
              "val": 200000,
              "accn": "0000073124-21-000272",
              "fy": 2021,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-10-26",
              "frame": "CY2021Q3I"
            },
            {
              "end": "2021-12-31",
              "val": 200000,
              "accn": "0000073124-22-000071",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-28"
            },
            {
              "end": "2021-12-31",
              "val": 200000,
              "accn": "0000073124-22-000148",
              "fy": 2022,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2022-05-03"
            },
            {
              "end": "2021-12-31",
              "val": 200000,
              "accn": "0000073124-22-000181",
              "fy": 2022,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2022-07-26"
            },
            {
              "end": "2021-12-31",
              "val": 200000,
              "accn": "0000073124-22-000208",
              "fy": 2022,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2022-10-25"
            },
            {
              "end": "2021-12-31",
              "val": 200000,
              "accn": "0000073124-23-000049",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-28",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-03-31",
              "val": 200000,
              "accn": "0000073124-22-000148",
              "fy": 2022,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2022-05-03",
              "frame": "CY2022Q1I"
            },
            {
              "end": "2022-06-30",
              "val": 200000,
              "accn": "0000073124-22-000181",
              "fy": 2022,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2022-07-26",
              "frame": "CY2022Q2I"
            },
            {
              "end": "2022-09-30",
              "val": 200000,
              "accn": "0000073124-22-000208",
              "fy": 2022,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2022-10-25",
              "frame": "CY2022Q3I"
            },
            {
              "end": "2022-12-31",
              "val": 200000,
              "accn": "0000073124-23-000049",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-28"
            },
            {
              "end": "2022-12-31",
              "val": 200000,
              "accn": "0000073124-23-000130",
              "fy": 2023,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2023-05-02"
            },
            {
              "end": "2022-12-31",
              "val": 200000,
              "accn": "0000073124-23-000159",
              "fy": 2023,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2023-07-25"
            },
            {
              "end": "2022-12-31",
              "val": 200000,
              "accn": "0000073124-23-000196",
              "fy": 2023,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2023-10-31"
            },
            {
              "end": "2022-12-31",
              "val": 200000,
              "accn": "0000073124-24-000073",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-27",
              "frame": "CY2022Q4I"
            }
          ]
        }
      },
      "LoansAndLeasesReceivableImpairedEndOfPeriodInAllowanceForLoanLoss": {
        "label": "Loans and Leases Receivable, Impaired, End of Period, in Allowance for Loan Loss (Deprecated 2011-01-31)",
        "description": "Reflects the carrying amount of loans which have been written down and for which there is a related reserve for credit loss.",
        "units": {
          "USD": [
            {
              "end": "2009-06-30",
              "val": 100100000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2009Q2I"
            },
            {
              "end": "2009-09-30",
              "val": 112700000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q3I"
            },
            {
              "end": "2009-12-31",
              "val": 94500000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2009-12-31",
              "val": 94500000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "end": "2010-06-30",
              "val": 135700000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2010Q2I"
            },
            {
              "end": "2010-09-30",
              "val": 135300000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2010Q3I"
            }
          ]
        }
      },
      "LoansAndLeasesReceivableImpairedEndOfPeriodNotInAllowanceForLoanLoss": {
        "label": "Loans and Leases Receivable, Impaired, End of Period, Not in Allowance for Loan Loss (Deprecated 2011-01-31)",
        "description": "Reflects the carrying amount of loans which have been written down and for which there is no related reserve for credit loss.",
        "units": {
          "USD": [
            {
              "end": "2009-06-30",
              "val": 119700000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2009Q2I"
            },
            {
              "end": "2009-09-30",
              "val": 135500000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q3I"
            },
            {
              "end": "2009-12-31",
              "val": 133600000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2009-12-31",
              "val": 133600000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "end": "2010-06-30",
              "val": 147200000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2010Q2I"
            },
            {
              "end": "2010-09-30",
              "val": 138700000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2010Q3I"
            }
          ]
        }
      },
      "LoansAndLeasesReceivableImpairedInterestLostOnNonaccrualLoans": {
        "label": "Loans and Leases Receivable, Impaired, Interest Lost on Nonaccrual Loans",
        "description": "Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period).",
        "units": {
          "USD": [
            {
              "start": "2019-01-01",
              "end": "2019-03-31",
              "val": 1900000,
              "accn": "0000073124-20-000179",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-04-27",
              "frame": "CY2019Q1"
            },
            {
              "start": "2019-01-01",
              "end": "2019-06-30",
              "val": 3900000,
              "accn": "0000073124-20-000212",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-07-28"
            },
            {
              "start": "2019-04-01",
              "end": "2019-06-30",
              "val": 2000000,
              "accn": "0000073124-20-000212",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-07-28",
              "frame": "CY2019Q2"
            },
            {
              "start": "2019-01-01",
              "end": "2019-09-30",
              "val": 5700000,
              "accn": "0000073124-20-000244",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-10-27"
            },
            {
              "start": "2019-07-01",
              "end": "2019-09-30",
              "val": 1800000,
              "accn": "0000073124-20-000244",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-10-27",
              "frame": "CY2019Q3"
            },
            {
              "start": "2020-01-01",
              "end": "2020-06-30",
              "val": 2400000,
              "accn": "0000073124-21-000239",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2021-07-27"
            },
            {
              "start": "2020-01-01",
              "end": "2020-09-30",
              "val": 3500000,
              "accn": "0000073124-21-000272",
              "fy": 2021,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-10-26"
            }
          ]
        }
      },
      "LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest": {
        "label": "Loans and Leases Receivable, Nonperforming, Nonaccrual of Interest",
        "description": "Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized.",
        "units": {
          "USD": [
            {
              "end": "2009-06-30",
              "val": 227900000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2009Q2I"
            },
            {
              "end": "2009-09-30",
              "val": 292300000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q3I"
            },
            {
              "end": "2009-12-31",
              "val": 278500000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "end": "2009-12-31",
              "val": 278500000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-06-30",
              "val": 345500000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2010Q2I"
            },
            {
              "end": "2010-09-30",
              "val": 327300000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2010Q3I"
            },
            {
              "end": "2013-12-31",
              "val": 274700000,
              "accn": "0001193125-14-391869",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-31"
            },
            {
              "end": "2013-12-31",
              "val": 274700000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-09-30",
              "val": 231200000,
              "accn": "0001193125-14-391869",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-31",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2014-12-31",
              "val": 232300000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "end": "2014-12-31",
              "val": 232300000,
              "accn": "0001193125-15-152967",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-28"
            },
            {
              "end": "2014-12-31",
              "val": 232300000,
              "accn": "0001193125-15-268306",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-29"
            },
            {
              "end": "2014-12-31",
              "val": 232300000,
              "accn": "0000073124-15-000217",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-28"
            },
            {
              "end": "2014-12-31",
              "val": 232300000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-03-31",
              "val": 228100000,
              "accn": "0001193125-15-152967",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-28",
              "frame": "CY2015Q1I"
            },
            {
              "end": "2015-06-30",
              "val": 218800000,
              "accn": "0001193125-15-268306",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-29",
              "frame": "CY2015Q2I"
            },
            {
              "end": "2015-09-30",
              "val": 207500000,
              "accn": "0000073124-15-000217",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-28",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2015-12-31",
              "val": 188300000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "end": "2015-12-31",
              "val": 188300000,
              "accn": "0000073124-16-000378",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-04-28"
            },
            {
              "end": "2015-12-31",
              "val": 188300000,
              "accn": "0000073124-16-000415",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-27"
            },
            {
              "end": "2015-12-31",
              "val": 188300000,
              "accn": "0000073124-16-000473",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-26"
            },
            {
              "end": "2015-12-31",
              "val": 188300000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-03-31",
              "val": 174400000,
              "accn": "0000073124-16-000378",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-04-28",
              "frame": "CY2016Q1I"
            },
            {
              "end": "2016-06-30",
              "val": 166400000,
              "accn": "0000073124-16-000415",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-27",
              "frame": "CY2016Q2I"
            },
            {
              "end": "2016-09-30",
              "val": 181000000,
              "accn": "0000073124-16-000473",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-26",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2016-12-31",
              "val": 165400000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28"
            },
            {
              "end": "2016-12-31",
              "val": 165400000,
              "accn": "0000073124-17-000190",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-02"
            },
            {
              "end": "2016-12-31",
              "val": 165400000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-03-31",
              "val": 186800000,
              "accn": "0000073124-17-000190",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-02",
              "frame": "CY2017Q1I"
            },
            {
              "end": "2017-12-31",
              "val": 155300000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            }
          ]
        }
      },
      "LoansAndLeasesReceivableImpairedTroubledDebtRestructuringAmount": {
        "label": "Loans and Leases Receivable, Impaired, Troubled Debt Restructuring, Amount (Deprecated 2011-01-31)",
        "description": "Reflects the carrying amount of loans with terms that have been modified because of the inability of the borrower, for financial reasons, to comply with the terms of the original loan agreement.",
        "units": {
          "USD": [
            {
              "end": "2009-12-31",
              "val": 24300000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2009-12-31",
              "val": 24300000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "end": "2010-06-30",
              "val": 27100000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2010Q2I"
            },
            {
              "end": "2010-09-30",
              "val": 30100000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2010Q3I"
            }
          ]
        }
      },
      "LoansAndLeasesReceivableNetOfDeferredIncome": {
        "label": "Loans and Leases Receivable, Net of Deferred Income",
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              "filed": "2019-10-28"
            },
            {
              "end": "2018-12-31",
              "val": 32377400000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-03-31",
              "val": 30506100000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 30871500000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 30738500000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 31305100000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2019Q4I"
            }
          ]
        }
      },
      "LoansAndLeasesReceivableOther": {
        "label": "Loans and Leases Receivable, Gross, Other (Deprecated 2016-01-31)",
        "description": "Amount before allowance of other loans and leases not otherwise specified in the taxonomy. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.",
        "units": {
          "USD": [
            {
              "end": "2009-06-30",
              "val": 1136400000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2009Q2I"
            },
            {
              "end": "2009-09-30",
              "val": 811900000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q3I"
            },
            {
              "end": "2009-12-31",
              "val": 774000000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2009-12-31",
              "val": 774000000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "end": "2010-06-30",
              "val": 793300000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2010Q2I"
            },
            {
              "end": "2010-09-30",
              "val": 751300000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2010Q3I"
            }
          ]
        }
      },
      "LoansHeldForSaleMortgages": {
        "label": "Disposal Group, Including Discontinued Operation, Mortgage Loans (Deprecated 2015-01-31)",
        "description": "Amount classified as mortgage loans attributable to disposal group held for sale or disposed of. Excludes loans and leases covered under loss sharing agreements and loans classified as debt securities.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 2200000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 9300000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "end": "2011-12-31",
              "val": 9300000,
              "accn": "0001193125-12-195882",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30"
            },
            {
              "end": "2011-12-31",
              "val": 9300000,
              "accn": "0001193125-12-319119",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-27"
            },
            {
              "end": "2011-12-31",
              "val": 9300000,
              "accn": "0001193125-12-437249",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-26"
            },
            {
              "end": "2011-12-31",
              "val": 9300000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-03-31",
              "val": 100000,
              "accn": "0001193125-12-195882",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-30",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": 100000,
              "accn": "0001193125-12-319119",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-27",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 0,
              "accn": "0001193125-12-437249",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-26",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 11700000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "end": "2012-12-31",
              "val": 11700000,
              "accn": "0001193125-13-186607",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-30"
            },
            {
              "end": "2012-12-31",
              "val": 11700000,
              "accn": "0001193125-13-316901",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-08-02"
            },
            {
              "end": "2012-12-31",
              "val": 11700000,
              "accn": "0001193125-13-411354",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-25"
            },
            {
              "end": "2012-12-31",
              "val": 11700000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-03-31",
              "val": 1100000,
              "accn": "0001193125-13-186607",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-30",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2013-06-30",
              "val": 1100000,
              "accn": "0001193125-13-316901",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-08-02",
              "frame": "CY2013Q2I"
            },
            {
              "end": "2013-09-30",
              "val": 2800000,
              "accn": "0001193125-13-411354",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-25",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001193125-14-163062",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-28"
            },
            {
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001193125-14-282591",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-28"
            },
            {
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001193125-14-391869",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-31"
            },
            {
              "end": "2013-12-31",
              "val": 0,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-03-31",
              "val": 0,
              "accn": "0001193125-14-163062",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-28",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2014-06-30",
              "val": 9500000,
              "accn": "0001193125-14-282591",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-28",
              "frame": "CY2014Q2I"
            },
            {
              "end": "2014-09-30",
              "val": 2100000,
              "accn": "0001193125-14-391869",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-31",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2014-12-31",
              "val": 2500000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "end": "2014-12-31",
              "val": 2500000,
              "accn": "0001193125-15-152967",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-28",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-03-31",
              "val": 0,
              "accn": "0001193125-15-152967",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-28",
              "frame": "CY2015Q1I"
            }
          ]
        }
      },
      "LoansReceivableCommercialFinancialAndAgricultural": {
        "label": "Loans Receivable, Gross, Commercial, Financial and Agricultural (Deprecated 2019-01-31)",
        "description": "Amount before allowance of loans issued to agricultural, commercial and industrial, and financial institutions. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.",
        "units": {
          "USD": [
            {
              "end": "2009-06-30",
              "val": 7322400000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2009Q2I"
            },
            {
              "end": "2009-09-30",
              "val": 6807500000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q3I"
            },
            {
              "end": "2009-12-31",
              "val": 6312100000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2009-12-31",
              "val": 6312100000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "end": "2010-06-30",
              "val": 6059700000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2010Q2I"
            },
            {
              "end": "2010-09-30",
              "val": 6098300000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2010Q3I"
            }
          ]
        }
      },
      "LoansReceivableCommercialMortgage": {
        "label": "Loans Receivable, Gross, Commercial, Mortgage (Deprecated 2019-01-31)",
        "description": "Amount before allowance of mortgage loans on existing land or building. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.",
        "units": {
          "USD": [
            {
              "end": "2012-12-31",
              "val": 2350000000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 2499400000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "end": "2013-12-31",
              "val": 2499400000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 2767700000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "end": "2014-12-31",
              "val": 2767700000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 3036600000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "end": "2015-12-31",
              "val": 3036600000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 3166300000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28"
            },
            {
              "end": "2016-12-31",
              "val": 3166300000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 2836300000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27"
            },
            {
              "end": "2017-12-31",
              "val": 2836300000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 2513100000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "LoansReceivableCommercialRealEstate": {
        "label": "Loans Receivable, Gross, Commercial, Real Estate (Deprecated 2019-01-31)",
        "description": "Amount before allowance of commercial loans issued to businesses to acquire, develop, construct, improve, or refinance land or building. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans covered under loss sharing agreements.",
        "units": {
          "USD": [
            {
              "end": "2009-06-30",
              "val": 3118500000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2009Q2I"
            },
            {
              "end": "2009-09-30",
              "val": 3126900000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2009Q3I"
            },
            {
              "end": "2009-12-31",
              "val": 3213200000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26"
            },
            {
              "end": "2009-12-31",
              "val": 3213200000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27"
            },
            {
              "end": "2009-12-31",
              "val": 3213200000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-06-30",
              "val": 3229100000,
              "accn": "0001193125-10-198108",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-26",
              "frame": "CY2010Q2I"
            },
            {
              "end": "2010-09-30",
              "val": 3217400000,
              "accn": "0001193125-10-237984",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-27",
              "frame": "CY2010Q3I"
            },
            {
              "end": "2010-12-31",
              "val": 3242400000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25"
            },
            {
              "end": "2010-12-31",
              "val": 3242400000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 2981700000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "end": "2011-12-31",
              "val": 2981700000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 2859800000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "end": "2012-12-31",
              "val": 2859800000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 2955800000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "end": "2013-12-31",
              "val": 2955800000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 3333300000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "end": "2014-12-31",
              "val": 3333300000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 3848800000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "end": "2015-12-31",
              "val": 3848800000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 4002500000,
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              "accn": "0000073124-25-000105",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-24"
            },
            {
              "end": "2024-12-31",
              "val": 648800000,
              "accn": "0000073124-26-000016",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-24",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 624400000,
              "accn": "0000073124-26-000016",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-24",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "OperatingLeasePayments": {
        "label": "Operating Lease, Payments",
        "description": "Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.",
        "units": {
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              "start": "2019-01-01",
              "end": "2019-03-31",
              "val": 28300000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29",
              "frame": "CY2019Q1"
            },
            {
              "start": "2019-01-01",
              "end": "2019-06-30",
              "val": 50300000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30"
            },
            {
              "start": "2019-04-01",
              "end": "2019-06-30",
              "val": 22000000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30",
              "frame": "CY2019Q2"
            },
            {
              "start": "2019-01-01",
              "end": "2019-09-30",
              "val": 72300000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28"
            },
            {
              "start": "2019-07-01",
              "end": "2019-09-30",
              "val": 22000000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28",
              "frame": "CY2019Q3"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 101200000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 101200000,
              "accn": "0000073124-21-000071",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-23",
              "frame": "CY2019"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 107900000,
              "accn": "0000073124-21-000071",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-23"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 107900000,
              "accn": "0000073124-22-000071",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-28",
              "frame": "CY2020"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 69500000,
              "accn": "0000073124-22-000071",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-28"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 69500000,
              "accn": "0000073124-23-000049",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-28",
              "frame": "CY2021"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 70300000,
              "accn": "0000073124-23-000049",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-28"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 70300000,
              "accn": "0000073124-24-000073",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-27",
              "frame": "CY2022"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 91400000,
              "accn": "0000073124-24-000073",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-27"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 91400000,
              "accn": "0000073124-25-000105",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-24",
              "frame": "CY2023"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": 94500000,
              "accn": "0000073124-25-000105",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-24"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": 94500000,
              "accn": "0000073124-26-000016",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-24",
              "frame": "CY2024"
            },
            {
              "start": "2025-01-01",
              "end": "2025-12-31",
              "val": 105400000,
              "accn": "0000073124-26-000016",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-24",
              "frame": "CY2025"
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          ]
        }
      },
      "OperatingLeaseRightOfUseAsset": {
        "label": "Operating Lease, Right-of-Use Asset",
        "description": "Amount of lessee's right to use underlying asset under operating lease.",
        "units": {
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              "end": "2019-03-31",
              "val": 460400000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 436500000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 466500000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 491600000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25"
            },
            {
              "end": "2019-12-31",
              "val": 491600000,
              "accn": "0000073124-21-000071",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-23",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 560500000,
              "accn": "0000073124-21-000071",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-23"
            },
            {
              "end": "2020-12-31",
              "val": 560500000,
              "accn": "0000073124-22-000071",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-28",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-12-31",
              "val": 531200000,
              "accn": "0000073124-22-000071",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-28"
            },
            {
              "end": "2021-12-31",
              "val": 531200000,
              "accn": "0000073124-23-000049",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-28",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-12-31",
              "val": 484800000,
              "accn": "0000073124-23-000049",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-28"
            },
            {
              "end": "2022-12-31",
              "val": 484800000,
              "accn": "0000073124-24-000073",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-27",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 522800000,
              "accn": "0000073124-24-000073",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-27"
            },
            {
              "end": "2023-12-31",
              "val": 522800000,
              "accn": "0000073124-25-000105",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-24",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 478000000,
              "accn": "0000073124-25-000105",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-24"
            },
            {
              "end": "2024-12-31",
              "val": 478000000,
              "accn": "0000073124-26-000016",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-24",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 464600000,
              "accn": "0000073124-26-000016",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-24",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDue": {
        "label": "Operating Leases, Future Minimum Payments Due",
        "description": "Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.",
        "units": {
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              "end": "2010-12-31",
              "val": 723600000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 745600000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 709700000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 710300000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 680600000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 536000000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 585900000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 787800000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 763100000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26"
            },
            {
              "end": "2018-12-31",
              "val": 763100000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29"
            },
            {
              "end": "2018-12-31",
              "val": 763100000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30"
            },
            {
              "end": "2018-12-31",
              "val": 763100000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28"
            },
            {
              "end": "2018-12-31",
              "val": 763100000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "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": {
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              "end": "2010-12-31",
              "val": 73700000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
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              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 86900000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 83900000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 82200000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 90700000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 85100000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 91000000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 95900000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 98800000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26"
            },
            {
              "end": "2018-12-31",
              "val": 98800000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29"
            },
            {
              "end": "2018-12-31",
              "val": 98800000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30"
            },
            {
              "end": "2018-12-31",
              "val": 98800000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28"
            },
            {
              "end": "2018-12-31",
              "val": 98800000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueFutureMinimumSubleaseRentals": {
        "label": "Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals",
        "description": "Contractually required future rental payments receivable on noncancelable subleasing arrangements.",
        "units": {
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            {
              "end": "2012-12-31",
              "val": 24100000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 26500000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 24000000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 10500000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 22900000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 21200000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 23400000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26"
            },
            {
              "end": "2018-12-31",
              "val": 23400000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29"
            },
            {
              "end": "2018-12-31",
              "val": 23400000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30"
            },
            {
              "end": "2018-12-31",
              "val": 23400000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28"
            },
            {
              "end": "2018-12-31",
              "val": 23400000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "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": "2010-12-31",
              "val": 55800000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 53300000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 59800000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 66300000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 61800000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 58800000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 61000000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 66700000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 67700000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26"
            },
            {
              "end": "2018-12-31",
              "val": 67700000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29"
            },
            {
              "end": "2018-12-31",
              "val": 67700000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30"
            },
            {
              "end": "2018-12-31",
              "val": 67700000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28"
            },
            {
              "end": "2018-12-31",
              "val": 67700000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "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": "2010-12-31",
              "val": 62100000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 67300000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 61700000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 68800000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 70500000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 62200000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 72300000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 76500000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 77200000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26"
            },
            {
              "end": "2018-12-31",
              "val": 77200000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29"
            },
            {
              "end": "2018-12-31",
              "val": 77200000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30"
            },
            {
              "end": "2018-12-31",
              "val": 77200000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28"
            },
            {
              "end": "2018-12-31",
              "val": 77200000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "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": "2010-12-31",
              "val": 68500000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 72100000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 68800000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 70400000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 80200000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 75400000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 74700000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 92200000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 85900000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26"
            },
            {
              "end": "2018-12-31",
              "val": 85900000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29"
            },
            {
              "end": "2018-12-31",
              "val": 85900000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30"
            },
            {
              "end": "2018-12-31",
              "val": 85900000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28"
            },
            {
              "end": "2018-12-31",
              "val": 85900000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "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": "2010-12-31",
              "val": 74000000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 85800000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 75800000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 75800000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 86000000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 81700000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 85500000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 96000000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 97800000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26"
            },
            {
              "end": "2018-12-31",
              "val": 97800000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29"
            },
            {
              "end": "2018-12-31",
              "val": 97800000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30"
            },
            {
              "end": "2018-12-31",
              "val": 97800000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28"
            },
            {
              "end": "2018-12-31",
              "val": 97800000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "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": "2010-12-31",
              "val": 389500000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 380200000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 359700000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 346800000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 291400000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 172800000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 201400000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 360500000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 335700000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26"
            },
            {
              "end": "2018-12-31",
              "val": 335700000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29"
            },
            {
              "end": "2018-12-31",
              "val": 335700000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30"
            },
            {
              "end": "2018-12-31",
              "val": 335700000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-28"
            },
            {
              "end": "2018-12-31",
              "val": 335700000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesRentExpenseNet": {
        "label": "Operating Leases, Rent Expense, Net",
        "description": "Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.",
        "units": {
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            {
              "start": "2008-12-31",
              "end": "2009-12-31",
              "val": 70200000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2009"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 68100000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 68100000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2010"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 84200000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 84200000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 84200000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 77900000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 77900000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 77900000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 76200000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 76200000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 76200000,
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              "accn": "0001193125-12-195882",
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            {
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              "accn": "0001193125-11-286394",
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            {
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              "accn": "0001193125-12-078391",
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            {
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      "OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease": {
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        "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.",
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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": "2013-12-31",
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            },
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              "filed": "2014-10-31",
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            {
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              "accn": "0001193125-15-065963",
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              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "end": "2014-12-31",
              "val": 1615100000,
              "accn": "0001193125-15-152967",
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              "filed": "2015-04-28"
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              "end": "2014-12-31",
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              "accn": "0001193125-15-268306",
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              "filed": "2015-07-29"
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              "end": "2014-12-31",
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              "accn": "0000073124-15-000217",
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              "frame": "CY2014Q4I"
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            {
              "end": "2015-03-31",
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            {
              "end": "2015-06-30",
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              "accn": "0001193125-15-268306",
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              "end": "2015-12-31",
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              "end": "2015-12-31",
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              "end": "2015-12-31",
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              "accn": "0000073124-16-000473",
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              "filed": "2016-10-26"
            },
            {
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              "filed": "2017-02-28",
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            {
              "end": "2016-03-31",
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              "filed": "2017-02-28"
            },
            {
              "end": "2016-12-31",
              "val": 1330900000,
              "accn": "0000073124-17-000190",
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              "fp": "Q1",
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              "filed": "2017-05-02"
            },
            {
              "end": "2016-12-31",
              "val": 1330900000,
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            },
            {
              "end": "2016-12-31",
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              "fy": 2017,
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            },
            {
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              "accn": "0000073124-18-000141",
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              "filed": "2018-02-27",
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            },
            {
              "end": "2017-03-31",
              "val": 1321800000,
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            {
              "end": "2017-06-30",
              "val": 1671700000,
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              "end": "2017-09-30",
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              "filed": "2018-02-27"
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            {
              "end": "2017-12-31",
              "val": 1449500000,
              "accn": "0000073124-18-000206",
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              "end": "2017-12-31",
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            },
            {
              "end": "2017-12-31",
              "val": 1449500000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
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              "filed": "2019-02-26",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-03-31",
              "val": 1422600000,
              "accn": "0000073124-18-000206",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-05-04",
              "frame": "CY2018Q1I"
            },
            {
              "end": "2018-06-30",
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              "accn": "0000073124-18-000259",
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              "filed": "2018-07-30",
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            {
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            },
            {
              "end": "2019-03-31",
              "val": 1125800000,
              "accn": "0000073124-19-000166",
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            {
              "end": "2019-06-30",
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              "accn": "0001193125-10-198108",
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              "filed": "2010-08-26",
              "frame": "CY2009Q2"
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              "val": 73600000,
              "accn": "0001193125-09-218667",
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            {
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            {
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        "description": "The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.",
        "units": {
          "shares": [
            {
              "end": "2010-12-31",
              "val": 15365279,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 12423266,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableIntrinsicValue": {
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Intrinsic Value (Deprecated 2011-01-31)",
        "description": "The total dollar difference between fair values of the underlying shares reserved for issuance and exercise prices of vested portions of options outstanding and currently exercisable under the option plan as of the balance sheet date.",
        "units": {
          "USD": [
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 68800000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010"
            }
          ]
        }
      },
      "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber": {
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number",
        "description": "The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.",
        "units": {
          "shares": [
            {
              "end": "2010-12-31",
              "val": 11672289,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 122887,
              "accn": "0000073124-26-000016",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-24",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice": {
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price",
        "description": "The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.",
        "units": {
          "USD/shares": [
            {
              "end": "2010-12-31",
              "val": 52.68,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 76.72,
              "accn": "0000073124-26-000016",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-24",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm": {
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term (Deprecated 2012-01-31)",
        "description": "The weighted average period between the balance sheet date and expiration for all vested portions of options outstanding and currently exercisable (or convertible) under the plan, which may be expressed in a decimal value for number of years.",
        "units": {
          "Year": [
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 3.4,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010"
            }
          ]
        }
      },
      "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriod": {
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period (Deprecated 2011-01-31)",
        "description": "The decrease in the number of reserved shares that could potentially be issued attributable to the exercise or conversion during the reporting period of previously issued stock options under the option plan.",
        "units": {
          "shares": [
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 419846,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010"
            }
          ]
        }
      },
      "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue": {
        "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.",
        "units": {
          "USD": [
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": 98500000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2008"
            },
            {
              "start": "2008-12-31",
              "end": "2009-12-31",
              "val": 11300000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25"
            },
            {
              "start": "2008-12-31",
              "end": "2009-12-31",
              "val": 11300000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2009"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 5000000,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 5000000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 5000000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2010"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 1500000,
              "accn": "0001193125-12-078391",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 1500000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 1500000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 12800000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 12800000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 12800000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 26900000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 26900000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 26900000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 35300000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 35300000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 35300000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 32100000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 32100000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 32100000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 83900000,
              "accn": "0000073124-17-000117",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-28"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 83900000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 83900000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 74700000,
              "accn": "0000073124-18-000141",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-27"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 74700000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 74700000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 28500000,
              "accn": "0000073124-19-000088",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 28500000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 28500000,
              "accn": "0000073124-21-000071",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-23",
              "frame": "CY2018"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 35400000,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 35400000,
              "accn": "0000073124-21-000071",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-23"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 35400000,
              "accn": "0000073124-22-000071",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-28",
              "frame": "CY2019"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 13600000,
              "accn": "0000073124-21-000071",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-23"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 13600000,
              "accn": "0000073124-22-000071",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-28"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 13600000,
              "accn": "0000073124-23-000049",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-28",
              "frame": "CY2020"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 41300000,
              "accn": "0000073124-22-000071",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-28"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 41300000,
              "accn": "0000073124-23-000049",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-28"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 41300000,
              "accn": "0000073124-24-000073",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-27",
              "frame": "CY2021"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 3600000,
              "accn": "0000073124-23-000049",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-28"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 3600000,
              "accn": "0000073124-24-000073",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-27"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 3600000,
              "accn": "0000073124-25-000105",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-24",
              "frame": "CY2022"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 1600000,
              "accn": "0000073124-24-000073",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-27"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 1600000,
              "accn": "0000073124-25-000105",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-24"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 1600000,
              "accn": "0000073124-26-000016",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-24",
              "frame": "CY2023"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": 2900000,
              "accn": "0000073124-25-000105",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-24"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": 2900000,
              "accn": "0000073124-26-000016",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-24",
              "frame": "CY2024"
            },
            {
              "start": "2025-01-01",
              "end": "2025-12-31",
              "val": 4200000,
              "accn": "0000073124-26-000016",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-24",
              "frame": "CY2025"
            }
          ]
        }
      },
      "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice": {
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price (Deprecated 2012-01-31)",
        "description": "The weighted average price at which option holders acquired shares when converting their stock options into shares under the plan during the reporting period.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 42.93,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010Q4I"
            }
          ]
        }
      },
      "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod": {
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period",
        "description": "For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.",
        "units": {
          "shares": [
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 1960716,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010"
            },
            {
              "start": "2025-01-01",
              "end": "2025-12-31",
              "val": 0,
              "accn": "0000073124-26-000016",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-24",
              "frame": "CY2025"
            }
          ]
        }
      },
      "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice": {
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price",
        "description": "Weighted average price of options that were either forfeited or expired.",
        "units": {
          "USD/shares": [
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 67.38,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010"
            }
          ]
        }
      },
      "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageIntrinsicValue": {
        "label": "Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Intrinsic Value",
        "description": "The combined weighted average of the accumulated differences between the fair values on underlying shares and exercises prices to acquire such shares as of the grant date on options that were either forfeited or lapsed.",
        "units": {
          "USD/shares": [
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 15.45,
              "accn": "0001193125-11-047592",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010"
            }
          ]
        }
      },
      "ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod": {
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              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 11778866,
              "accn": "0000073124-20-000101",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-25"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 11778866,
              "accn": "0000073124-21-000071",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-23"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 11778866,
              "accn": "0000073124-22-000071",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-28",
              "frame": "CY2019"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 3276589,
              "accn": "0000073124-21-000071",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-23"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 3276589,
              "accn": "0000073124-22-000071",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-28"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 3276589,
              "accn": "0000073124-23-000049",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-28",
              "frame": "CY2020"
            },
            {
              "start": "2021-01-01",
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              "val": 2527544,
              "accn": "0000073124-22-000071",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-28"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 2527544,
              "accn": "0000073124-23-000049",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-28"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 2527544,
              "accn": "0000073124-24-000073",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-27",
              "frame": "CY2021"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 311536,
              "accn": "0000073124-23-000049",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-28"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 311536,
              "accn": "0000073124-24-000073",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-27"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 311536,
              "accn": "0000073124-25-000105",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-24",
              "frame": "CY2022"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 4384678,
              "accn": "0000073124-24-000073",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-27"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 4384678,
              "accn": "0000073124-25-000105",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-24"
            },
            {
              "start": "2023-01-01",
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              "val": 4384678,
              "accn": "0000073124-26-000016",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-24",
              "frame": "CY2023"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": 10489770,
              "accn": "0000073124-25-000105",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-24"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": 10489770,
              "accn": "0000073124-26-000016",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-24",
              "frame": "CY2024"
            },
            {
              "start": "2025-01-01",
              "end": "2025-12-31",
              "val": 11005509,
              "accn": "0000073124-26-000016",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-24",
              "frame": "CY2025"
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          ]
        }
      },
      "StockRedeemedOrCalledDuringPeriodValue": {
        "label": "Stock Redeemed or Called During Period, Value",
        "description": "Equity impact of the value of stock bought back by the entity at the exercise price or redemption price.",
        "units": {
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              "val": 400000000,
              "accn": "0000073124-20-000179",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-04-27"
            },
            {
              "start": "2020-01-01",
              "end": "2020-03-31",
              "val": 400000000,
              "accn": "0000073124-20-000212",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-07-28"
            },
            {
              "start": "2020-01-01",
              "end": "2020-03-31",
              "val": 400000000,
              "accn": "0000073124-20-000244",
              "fy": 2020,
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              "form": "10-Q",
              "filed": "2020-10-27"
            },
            {
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              "val": 400000000,
              "accn": "0000073124-21-000185",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2021-04-27"
            },
            {
              "start": "2020-01-01",
              "end": "2020-03-31",
              "val": 400000000,
              "accn": "0000073124-21-000239",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2021-07-27"
            },
            {
              "start": "2020-01-01",
              "end": "2020-03-31",
              "val": 400000000,
              "accn": "0000073124-21-000272",
              "fy": 2021,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-10-26",
              "frame": "CY2020Q1"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 400000000,
              "accn": "0000073124-21-000071",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-23"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 400000000,
              "accn": "0000073124-22-000071",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-28"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 400000000,
              "accn": "0000073124-23-000049",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-28",
              "frame": "CY2020"
            }
          ]
        }
      },
      "StockRepurchasedDuringPeriodShares": {
        "label": "Stock Repurchased During Period, Shares",
        "description": "Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.",
        "units": {
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              "frame": "CY2008"
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            {
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              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2009"
            },
            {
              "start": "2009-12-31",
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              "accn": "0001193125-11-047592",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-25",
              "frame": "CY2010"
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          ]
        }
      },
      "StockRepurchaseProgramAuthorizedAmount1": {
        "label": "Stock Repurchase Program, Authorized Amount",
        "description": "Amount of stock repurchase plan authorized.",
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              "frame": "CY2015Q1I"
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            {
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              "filed": "2017-10-26",
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          ]
        }
      },
      "StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased": {
        "label": "Stock Repurchase Program, Number of Shares Authorized to be Repurchased",
        "description": "The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.",
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              "filed": "2018-02-27",
              "frame": "CY2015Q1I"
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            {
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              "frame": "CY2017Q2I"
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            {
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              "filed": "2018-05-04"
            },
            {
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              "accn": "0000073124-18-000259",
              "fy": 2018,
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              "form": "10-Q",
              "filed": "2018-07-30"
            },
            {
              "end": "2018-07-16",
              "val": 9500000,
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              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-26",
              "frame": "CY2018Q2I"
            },
            {
              "end": "2018-07-17",
              "val": 25000000,
              "accn": "0000073124-18-000297",
              "fy": 2018,
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              "form": "10-Q",
              "filed": "2018-10-29"
            },
            {
              "end": "2018-07-17",
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              "accn": "0000073124-19-000088",
              "fy": 2018,
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              "form": "10-K",
              "filed": "2019-02-26"
            },
            {
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              "val": 25000000,
              "accn": "0000073124-19-000166",
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              "filed": "2019-04-29"
            },
            {
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              "accn": "0000073124-19-000197",
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            {
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              "fy": 2019,
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              "filed": "2019-10-28"
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            {
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              "filed": "2020-02-25"
            },
            {
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            },
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            },
            {
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              "filed": "2020-10-27"
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            {
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            {
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            {
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              "accn": "0000073124-22-000071",
              "fy": 2021,
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              "form": "10-K",
              "filed": "2022-02-28"
            },
            {
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              "accn": "0000073124-22-000148",
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            },
            {
              "end": "2021-10-31",
              "val": 25000000,
              "accn": "0000073124-22-000181",
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              "filed": "2022-07-26"
            },
            {
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            {
              "end": "2021-10-31",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-28"
            },
            {
              "end": "2021-10-31",
              "val": 25000000,
              "accn": "0000073124-23-000130",
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              "fp": "Q1",
              "form": "10-Q",
              "filed": "2023-05-02"
            },
            {
              "end": "2021-10-31",
              "val": 25000000,
              "accn": "0000073124-23-000159",
              "fy": 2023,
              "fp": "Q2",
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              "filed": "2023-07-25"
            },
            {
              "end": "2021-10-31",
              "val": 25000000,
              "accn": "0000073124-23-000196",
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              "form": "10-Q",
              "filed": "2023-10-31"
            },
            {
              "end": "2021-10-31",
              "val": 25000000,
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              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-27"
            },
            {
              "end": "2021-10-31",
              "val": 25000000,
              "accn": "0000073124-24-000159",
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              "fp": "Q1",
              "form": "10-Q",
              "filed": "2024-04-23",
              "frame": "CY2021Q3I"
            }
          ]
        }
      },
      "StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased": {
        "label": "Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased",
        "description": "The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.",
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              "accn": "0001193125-12-078391",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-24",
              "frame": "CY2011Q4I"
            },
            {
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              "val": 10000000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-12-31",
              "val": 6800000,
              "accn": "0001193125-13-076407",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 7900000,
              "accn": "0001193125-14-069870",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 7100000,
              "accn": "0001193125-15-065963",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-06-30",
              "val": 13704737,
              "accn": "0001193125-15-268306",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-29",
              "frame": "CY2015Q2I"
            },
            {
              "end": "2015-09-30",
              "val": 11789787,
              "accn": "0000073124-15-000217",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-28",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2015-12-31",
              "val": 9700000,
              "accn": "0000073124-16-000324",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-29",
              "frame": "CY2015Q4I"
            },
            {
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              "fy": 2016,
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              "form": "10-Q",
              "filed": "2016-04-28",
              "frame": "CY2016Q1I"
            },
            {
              "end": "2016-06-30",
              "val": 5424157,
              "accn": "0000073124-16-000415",
              "fy": 2016,
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              "form": "10-Q",
              "filed": "2016-07-27",
              "frame": "CY2016Q2I"
            },
            {
              "end": "2016-09-30",
              "val": 4472756,
              "accn": "0000073124-16-000473",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-26",
              "frame": "CY2016Q3I"
            }
          ]
        }
      },
      "SubleaseIncome": {
        "label": "Sublease Income",
        "description": "Amount of sublease income excluding finance and operating lease expense.",
        "units": {
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              "end": "2019-03-31",
              "val": 1500000,
              "accn": "0000073124-19-000166",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-29",
              "frame": "CY2019Q1"
            },
            {
              "start": "2019-01-01",
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              "val": 3000000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-30"
            },
            {
              "start": "2019-04-01",
              "end": "2019-06-30",
              "val": 1500000,
              "accn": "0000073124-19-000197",
              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-07-30",
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            },
            {
              "start": "2019-01-01",
              "end": "2019-09-30",
              "val": 4400000,
              "accn": "0000073124-19-000237",
              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-10-28"
            },
            {
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