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              "frame": "CY2013Q1"
            }
          ]
        }
      },
      "BankruptcyClaimsAmountOfClaimsUnderReviewByManagement": {
        "label": "Bankruptcy Claims, Amount of Claims under Review by Management",
        "description": "Amount of bankruptcy claim under review by management.",
        "units": {
          "USD": [
            {
              "end": "2012-09-30",
              "val": 116500000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 14800000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 14800000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2013-03-31",
              "val": 16100000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18",
              "frame": "CY2013Q1I"
            }
          ]
        }
      },
      "BankruptcyClaimsAmountPaidToSettleClaims": {
        "label": "Bankruptcy Claims, Amount Paid to Settle Claims",
        "description": "Amount paid to settle bankruptcy claim.",
        "units": {
          "USD": [
            {
              "end": "2014-12-31",
              "val": 116000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 116000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25"
            }
          ]
        }
      },
      "BankruptcyClaimsNumberClaimsFiled": {
        "label": "Bankruptcy Claims, Number Claims Filed",
        "description": "The aggregate number of claims filed with the bankruptcy court.",
        "units": {
          "pure": [
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": 8876,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 13259,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 13366,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 13366,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2013-01-01",
              "end": "2013-03-31",
              "val": 13400,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18",
              "frame": "CY2013Q1"
            }
          ]
        }
      },
      "BusinessAcquisitionEquityInterestIssuedOrIssuableValueAssigned": {
        "label": "Business Acquisition, Equity Interest Issued or Issuable, Value Assigned",
        "description": "Value of equity interests (such as common shares, preferred shares, or partnership interest) issued or issuable to acquire the entity.",
        "units": {
          "USD": [
            {
              "end": "2013-12-09",
              "val": 4451000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2013Q4I"
            }
          ]
        }
      },
      "BusinessAcquisitionEquityInterestsIssuedOrIssuableNumberOfSharesIssued": {
        "label": "Business Acquisition, Equity Interest Issued or Issuable, Number of Shares",
        "description": "Number of shares of equity interests issued or issuable to acquire entity.",
        "units": {
          "shares": [
            {
              "end": "2013-12-09",
              "val": 197400000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2013Q4I"
            }
          ]
        }
      },
      "BusinessAcquisitionSharePrice": {
        "label": "Business Acquisition, Share Price",
        "description": "Price of a single share of a number of saleable stocks paid or offered to be paid in a business combination.",
        "units": {
          "USD/shares": [
            {
              "end": "2013-12-09",
              "val": 22.55,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2013-12-09",
              "val": 22.55,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25"
            },
            {
              "end": "2013-12-09",
              "val": 22.55,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            }
          ]
        }
      },
      "BusinessAcquisitionsProFormaNetIncomeLoss": {
        "label": "Business Acquisition, Pro Forma Net Income (Loss)",
        "description": "The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.",
        "units": {
          "USD": [
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 520000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2012"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -1239000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 2526000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2013"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": -1233000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            }
          ]
        }
      },
      "BusinessAcquisitionsProFormaRevenue": {
        "label": "Business Acquisition, Pro Forma Revenue",
        "description": "The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.",
        "units": {
          "USD": [
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 38897000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2012"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 38620000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 40678000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2013"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 40419000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            }
          ]
        }
      },
      "BusinessCombinationAcquisitionRelatedCosts": {
        "label": "Business Combination, Acquisition Related Costs",
        "description": "This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.",
        "units": {
          "USD": [
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 0,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-09-30",
              "val": 55000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 96000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2013"
            }
          ]
        }
      },
      "BusinessCombinationConsiderationTransferred1": {
        "label": "Business Combination, Consideration Transferred",
        "description": "Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.",
        "units": {
          "USD": [
            {
              "start": "2013-12-08",
              "end": "2013-12-09",
              "val": 4592000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            }
          ]
        }
      },
      "BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable": {
        "label": "Business Combination, Consideration Transferred, Equity Interests Issued and Issuable",
        "description": "Amount of equity interests of the acquirer, including instruments or interests issued or issuable in consideration for the business combination.",
        "units": {
          "USD": [
            {
              "start": "2013-12-08",
              "end": "2013-12-09",
              "val": 4451000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            }
          ]
        }
      },
      "BusinessCombinationContingentConsiderationLiability": {
        "label": "Business Combination, Contingent Consideration, Liability",
        "description": "Amount of liability recognized arising from contingent consideration in a business combination.",
        "units": {
          "USD": [
            {
              "end": "2013-12-09",
              "val": 4592000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2013Q4I"
            }
          ]
        }
      },
      "BusinessCombinationIntegrationRelatedCosts": {
        "label": "Business Combination, Integration Related Costs",
        "description": "Costs incurred to effect a business combination which have been expensed during the period. Such costs could include business integration costs, systems integration and conversion costs, and severance and other employee-related costs.",
        "units": {
          "USD": [
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 0,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-03-31",
              "val": 16000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18",
              "frame": "CY2013Q1"
            },
            {
              "start": "2013-01-01",
              "end": "2013-06-30",
              "val": 21600000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18"
            },
            {
              "start": "2013-04-01",
              "end": "2013-06-30",
              "val": 6200000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18",
              "frame": "CY2013Q2"
            },
            {
              "start": "2013-01-01",
              "end": "2013-09-30",
              "val": 35400000,
              "accn": "0000006201-13-000089",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17"
            },
            {
              "start": "2013-07-01",
              "end": "2013-09-30",
              "val": 13800000,
              "accn": "0000006201-13-000089",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17",
              "frame": "CY2013Q3"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 295000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 443000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 443000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-03-31",
              "val": 142000000,
              "accn": "0000006201-14-000011",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-24"
            },
            {
              "start": "2014-01-01",
              "end": "2014-03-31",
              "val": 202000000,
              "accn": "0001193125-15-145178",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-24",
              "frame": "CY2014Q1"
            },
            {
              "start": "2014-01-01",
              "end": "2014-06-30",
              "val": 365000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24"
            },
            {
              "start": "2014-01-01",
              "end": "2014-06-30",
              "val": 365000000,
              "accn": "0001193125-15-261937",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-24"
            },
            {
              "start": "2014-04-01",
              "end": "2014-06-30",
              "val": 163000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24"
            },
            {
              "start": "2014-04-01",
              "end": "2014-06-30",
              "val": 163000000,
              "accn": "0001193125-15-261937",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-24",
              "frame": "CY2014Q2"
            },
            {
              "start": "2014-01-01",
              "end": "2014-09-30",
              "val": 530000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23"
            },
            {
              "start": "2014-01-01",
              "end": "2014-09-30",
              "val": 530000000,
              "accn": "0001193125-15-351246",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-23"
            },
            {
              "start": "2014-07-01",
              "end": "2014-09-30",
              "val": 166000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
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              "form": "10-Q",
              "filed": "2014-10-23"
            },
            {
              "start": "2014-07-01",
              "end": "2014-09-30",
              "val": 166000000,
              "accn": "0001193125-15-351246",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-23",
              "frame": "CY2014Q3"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 810000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 810000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 732000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-03-31",
              "val": 216000000,
              "accn": "0001193125-15-145178",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-24",
              "frame": "CY2015Q1"
            },
            {
              "start": "2015-01-01",
              "end": "2015-06-30",
              "val": 437000000,
              "accn": "0001193125-15-261937",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-24"
            },
            {
              "start": "2015-01-01",
              "end": "2015-06-30",
              "val": 543000000,
              "accn": "0001193125-16-654354",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-22"
            },
            {
              "start": "2015-04-01",
              "end": "2015-06-30",
              "val": 221000000,
              "accn": "0001193125-15-261937",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-24"
            },
            {
              "start": "2015-04-01",
              "end": "2015-06-30",
              "val": 224000000,
              "accn": "0001193125-16-654354",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-22",
              "frame": "CY2015Q2"
            },
            {
              "start": "2015-01-01",
              "end": "2015-09-30",
              "val": 633000000,
              "accn": "0001193125-15-351246",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-23"
            },
            {
              "start": "2015-01-01",
              "end": "2015-09-30",
              "val": 741000000,
              "accn": "0001193125-16-742263",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-20"
            },
            {
              "start": "2015-07-01",
              "end": "2015-09-30",
              "val": 196000000,
              "accn": "0001193125-15-351246",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-23"
            },
            {
              "start": "2015-07-01",
              "end": "2015-09-30",
              "val": 198000000,
              "accn": "0001193125-16-742263",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-20",
              "frame": "CY2015Q3"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 1000000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 826000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 826000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
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            }
          ]
        }
      },
      "BusinessExitCosts1": {
        "label": "Business Exit Costs",
        "description": "Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.",
        "units": {
          "USD": [
            {
              "start": "2015-01-01",
              "end": "2015-09-30",
              "val": 38000000,
              "accn": "0001193125-16-742263",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-20"
            },
            {
              "start": "2015-07-01",
              "end": "2015-09-30",
              "val": 38000000,
              "accn": "0001193125-16-742263",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-20",
              "frame": "CY2015Q3"
            }
          ]
        }
      },
      "CapitalLeasedAssetsGross": {
        "label": "Capital Leased Assets, Gross",
        "description": "Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.",
        "units": {
          "USD": [
            {
              "end": "2009-12-31",
              "val": 866000000,
              "accn": "0000950123-11-014726",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-16",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 824000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 824000000,
              "accn": "0000950123-11-014726",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-16"
            },
            {
              "end": "2011-12-31",
              "val": 841000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 841000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "end": "2011-12-31",
              "val": 841000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2012-12-31",
              "val": 488000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 488000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            }
          ]
        }
      },
      "CapitalLeaseObligationsCurrent": {
        "label": "Capital Lease Obligations, Current",
        "description": "Amount of capital lease obligation due within one year or the normal operating cycle, if longer.",
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            {
              "end": "2009-12-31",
              "val": 90000000,
              "accn": "0000950123-11-014726",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-16",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2009-12-31",
              "val": 90000000,
              "accn": "0000950123-10-094605",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-20"
            },
            {
              "end": "2009-12-31",
              "val": 90000000,
              "accn": "0000950123-10-066894",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-07-21"
            },
            {
              "end": "2010-06-30",
              "val": 102000000,
              "accn": "0000950123-10-066894",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-07-21",
              "frame": "CY2010Q2I"
            },
            {
              "end": "2010-09-30",
              "val": 107000000,
              "accn": "0000950123-10-094605",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-20",
              "frame": "CY2010Q3I"
            },
            {
              "end": "2010-12-31",
              "val": 107000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 107000000,
              "accn": "0001193125-11-274936",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-19"
            },
            {
              "end": "2010-12-31",
              "val": 107000000,
              "accn": "0001193125-11-192475",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-20"
            },
            {
              "end": "2010-12-31",
              "val": 107000000,
              "accn": "0000950123-11-037302",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-04-20"
            },
            {
              "end": "2010-12-31",
              "val": 107000000,
              "accn": "0000950123-11-014726",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-16"
            },
            {
              "end": "2011-03-31",
              "val": 100000000,
              "accn": "0000950123-11-037302",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-04-20",
              "frame": "CY2011Q1I"
            },
            {
              "end": "2011-06-30",
              "val": 89000000,
              "accn": "0001193125-11-192475",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-20",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 79000000,
              "accn": "0001193125-11-274936",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-19",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-12-31",
              "val": 0,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 0,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2011-12-31",
              "val": 0,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17"
            },
            {
              "end": "2011-12-31",
              "val": 0,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18"
            },
            {
              "end": "2012-03-31",
              "val": 66000000,
              "accn": "0001193125-12-169778",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-19",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": 56000000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 36000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 31000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16"
            },
            {
              "end": "2012-12-31",
              "val": 31000000,
              "accn": "0000006201-13-000089",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 31000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18"
            },
            {
              "end": "2012-12-31",
              "val": 31000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18"
            },
            {
              "end": "2012-12-31",
              "val": 31000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2013-03-31",
              "val": 30000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2013-06-30",
              "val": 29000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18",
              "frame": "CY2013Q2I"
            },
            {
              "end": "2013-09-30",
              "val": 24000000,
              "accn": "0000006201-13-000089",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2017-12-31",
              "val": 78000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2017Q4I"
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          ]
        }
      },
      "CapitalLeaseObligationsIncurred": {
        "label": "Lease Obligation Incurred",
        "description": "Amount of increase in lease obligation from new lease.",
        "units": {
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              "end": "2013-06-30",
              "val": 0,
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              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24"
            },
            {
              "start": "2013-01-01",
              "end": "2013-09-30",
              "val": 0,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23"
            },
            {
              "start": "2014-01-01",
              "end": "2014-03-31",
              "val": 122000000,
              "accn": "0001193125-15-145178",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-24",
              "frame": "CY2014Q1"
            },
            {
              "start": "2014-01-01",
              "end": "2014-06-30",
              "val": 361000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24"
            },
            {
              "start": "2014-01-01",
              "end": "2014-06-30",
              "val": 361000000,
              "accn": "0001193125-15-261937",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-24"
            },
            {
              "start": "2014-01-01",
              "end": "2014-09-30",
              "val": 479000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23"
            },
            {
              "start": "2014-01-01",
              "end": "2014-09-30",
              "val": 479000000,
              "accn": "0001193125-15-351246",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-23"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 747000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 747000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24"
            },
            {
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              "end": "2014-12-31",
              "val": 747000000,
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              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-03-31",
              "val": 5000000,
              "accn": "0001193125-15-145178",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-24"
            },
            {
              "start": "2015-01-01",
              "end": "2015-03-31",
              "val": 5000000,
              "accn": "0001193125-16-551225",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-04-22",
              "frame": "CY2015Q1"
            },
            {
              "start": "2015-01-01",
              "end": "2015-06-30",
              "val": 5000000,
              "accn": "0001193125-15-261937",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-24"
            },
            {
              "start": "2015-01-01",
              "end": "2015-06-30",
              "val": 5000000,
              "accn": "0001193125-16-654354",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-22"
            },
            {
              "start": "2015-01-01",
              "end": "2015-09-30",
              "val": 5000000,
              "accn": "0001193125-15-351246",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-23"
            },
            {
              "start": "2015-01-01",
              "end": "2015-09-30",
              "val": 5000000,
              "accn": "0001193125-16-742263",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-20"
            },
            {
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              "end": "2015-12-31",
              "val": 5000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 5000000,
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              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 5000000,
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              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 0,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
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              "val": 0,
              "accn": "0000006201-18-000009",
              "fy": 2017,
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              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2017"
            }
          ]
        }
      },
      "CapitalLeaseObligationsNoncurrent": {
        "label": "Capital Lease Obligations, Noncurrent",
        "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 and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date.",
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              "val": 599000000,
              "accn": "0000950123-11-014726",
              "fy": 2010,
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              "filed": "2011-02-16",
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            {
              "end": "2009-12-31",
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              "filed": "2010-10-20"
            },
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              "end": "2009-12-31",
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            {
              "end": "2010-12-31",
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              "filed": "2011-02-16"
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              "accn": "0000950123-11-037302",
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              "filed": "2011-04-20",
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            },
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              "end": "2011-06-30",
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              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
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            {
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              "filed": "2013-04-16",
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            {
              "end": "2011-12-31",
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            {
              "end": "2011-12-31",
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            {
              "end": "2011-12-31",
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              "accn": "0000006201-12-000069",
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            },
            {
              "end": "2012-03-31",
              "val": 316000000,
              "accn": "0001193125-12-169778",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-19",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": 393000000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 392000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 381000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16"
            },
            {
              "end": "2012-12-31",
              "val": 381000000,
              "accn": "0000006201-13-000089",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 381000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18"
            },
            {
              "end": "2012-12-31",
              "val": 381000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18"
            },
            {
              "end": "2012-12-31",
              "val": 381000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2013-03-31",
              "val": 375000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2013-06-30",
              "val": 367000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18",
              "frame": "CY2013Q2I"
            },
            {
              "end": "2013-09-30",
              "val": 345000000,
              "accn": "0000006201-13-000089",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2017-12-31",
              "val": 693000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2017Q4I"
            }
          ]
        }
      },
      "CapitalLeasesBalanceSheetAssetsByMajorClassNet": {
        "label": "Capital Leases, Balance Sheet, Assets by Major Class, Net",
        "description": "The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization.",
        "units": {
          "USD": [
            {
              "end": "2009-12-31",
              "val": 295000000,
              "accn": "0000950123-11-014726",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-16",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2009-12-31",
              "val": 295000000,
              "accn": "0000950123-10-094605",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-20"
            },
            {
              "end": "2009-12-31",
              "val": 295000000,
              "accn": "0000950123-10-066894",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-07-21"
            },
            {
              "end": "2010-06-30",
              "val": 271000000,
              "accn": "0000950123-10-066894",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-07-21",
              "frame": "CY2010Q2I"
            },
            {
              "end": "2010-09-30",
              "val": 255000000,
              "accn": "0000950123-10-094605",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-10-20",
              "frame": "CY2010Q3I"
            },
            {
              "end": "2010-12-31",
              "val": 244000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 244000000,
              "accn": "0001193125-11-274936",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-19"
            },
            {
              "end": "2010-12-31",
              "val": 244000000,
              "accn": "0001193125-11-192475",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-20"
            },
            {
              "end": "2010-12-31",
              "val": 244000000,
              "accn": "0000950123-11-037302",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-04-20"
            },
            {
              "end": "2010-12-31",
              "val": 244000000,
              "accn": "0000950123-11-014726",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-16"
            },
            {
              "end": "2011-03-31",
              "val": 359000000,
              "accn": "0000950123-11-037302",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-04-20",
              "frame": "CY2011Q1I"
            },
            {
              "end": "2011-06-30",
              "val": 403000000,
              "accn": "0001193125-11-192475",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-20",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 400000000,
              "accn": "0001193125-11-274936",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-19",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-12-31",
              "val": 393000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 393000000,
              "accn": "0001193125-12-169778",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-19"
            },
            {
              "end": "2011-12-31",
              "val": 393000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "end": "2011-12-31",
              "val": 393000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2011-12-31",
              "val": 393000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17"
            },
            {
              "end": "2011-12-31",
              "val": 393000000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18"
            },
            {
              "end": "2012-03-31",
              "val": 322000000,
              "accn": "0001193125-12-169778",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-19",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": 313000000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 298000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 283000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16"
            },
            {
              "end": "2012-12-31",
              "val": 283000000,
              "accn": "0000006201-13-000089",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 283000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18"
            },
            {
              "end": "2012-12-31",
              "val": 283000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18"
            },
            {
              "end": "2012-12-31",
              "val": 283000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2013-03-31",
              "val": 269000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2013-06-30",
              "val": 261000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18",
              "frame": "CY2013Q2I"
            },
            {
              "end": "2013-09-30",
              "val": 247000000,
              "accn": "0000006201-13-000089",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17",
              "frame": "CY2013Q3I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsDue": {
        "label": "Capital Leases, Future Minimum Payments Due",
        "description": "Amount of minimum lease payments for capital leases.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 1118000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 682000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 682000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            }
          ]
        }
      },
      "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": "2011-12-31",
              "val": 167000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 82000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 82000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2017-12-31",
              "val": 126000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "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": "2011-12-31",
              "val": 78000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 52000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 52000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2017-12-31",
              "val": 122000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "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": "2011-12-31",
              "val": 118000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 56000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 56000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2017-12-31",
              "val": 118000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "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": "2011-12-31",
              "val": 129000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 63000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 63000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2017-12-31",
              "val": 120000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "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": "2011-12-31",
              "val": 149000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 69000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 69000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2017-12-31",
              "val": 123000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "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": "2011-12-31",
              "val": 477000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 360000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 360000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2017-12-31",
              "val": 387000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "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": "2011-12-31",
              "val": 439000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 251000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 251000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2017-12-31",
              "val": 225000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2017Q4I"
            }
          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsNetMinimumPayments1": {
        "label": "Capital Leases, Future Minimum Payments, Net Minimum Payments",
        "description": "Amount of minimum lease payments for capital leases net of executory costs, which include amounts paid by the lessee to the lessor for insurance, maintenance and taxes.",
        "units": {
          "USD": [
            {
              "end": "2017-12-31",
              "val": 996000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2017Q4I"
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          ]
        }
      },
      "CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments": {
        "label": "Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments",
        "description": "Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes.",
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              "accn": "0001193125-12-063516",
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            {
              "end": "2012-12-31",
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              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 431000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
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              "filed": "2013-02-20"
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            {
              "end": "2017-12-31",
              "val": 771000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2017Q4I"
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          ]
        }
      },
      "CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation": {
        "label": "Capital Leases, Lessee Balance Sheet, Assets by Major Class, Accumulated Depreciation",
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              "filed": "2012-02-15",
              "frame": "CY2010Q4I"
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            {
              "end": "2010-12-31",
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            {
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              "frame": "CY2011Q4I"
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            {
              "end": "2011-12-31",
              "val": 448000000,
              "accn": "0001193125-12-063516",
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          ]
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            {
              "end": "2011-12-31",
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            {
              "end": "2011-12-31",
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              "accn": "0001193125-12-169778",
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              "filed": "2012-04-19",
              "frame": "CY2012Q1I"
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            {
              "end": "2012-06-30",
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              "accn": "0000006201-12-000069",
              "fy": 2012,
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              "end": "2012-12-31",
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      "CapitalLeasesLesseeBalanceSheetAssetsByMajorClassOtherPropertyPlantAndEquipment": {
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              "end": "2011-12-31",
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            {
              "end": "2012-06-30",
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              "filed": "2013-04-18",
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            {
              "end": "2013-06-30",
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            {
              "end": "2013-09-30",
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      },
      "CargoAndFreightRevenue": {
        "label": "Cargo and Freight Revenue (Deprecated 2018-01-31)",
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            {
              "start": "2009-01-01",
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              "val": 578000000,
              "accn": "0001193125-12-063516",
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              "fp": "FY",
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            {
              "start": "2010-01-01",
              "end": "2010-03-31",
              "val": 154000000,
              "accn": "0000950123-11-037302",
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            {
              "start": "2010-01-01",
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              "accn": "0000950123-10-066894",
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              "form": "10-Q",
              "filed": "2010-07-21"
            },
            {
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              "filed": "2011-07-20"
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            {
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            {
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              "end": "2010-06-30",
              "val": 170000000,
              "accn": "0001193125-11-192475",
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              "filed": "2011-07-20",
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            },
            {
              "start": "2010-01-01",
              "end": "2010-09-30",
              "val": 491000000,
              "accn": "0000950123-10-094605",
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            },
            {
              "start": "2010-01-01",
              "end": "2010-09-30",
              "val": 491000000,
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              "fy": 2011,
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              "filed": "2011-10-19"
            },
            {
              "start": "2010-07-01",
              "end": "2010-09-30",
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              "accn": "0000950123-10-094605",
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            {
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              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18"
            },
            {
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              "form": "10-Q",
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              "accn": "0000006201-14-000004",
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              "fp": "FY",
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              "end": "2012-03-31",
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              "filed": "2013-04-18",
              "frame": "CY2012Q1I"
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            },
            {
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              "frame": "CY2012Q3I"
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            {
              "end": "2012-12-31",
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            },
            {
              "end": "2012-12-31",
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              "fy": 2012,
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              "filed": "2013-04-16"
            },
            {
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              "filed": "2013-04-18"
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            {
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              "accn": "0000006201-13-000067",
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            {
              "end": "2012-12-31",
              "val": 480000000,
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            {
              "end": "2012-12-31",
              "val": 480000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            },
            {
              "end": "2012-12-31",
              "val": 480000000,
              "accn": "0000006201-14-000011",
              "fy": 2014,
              "fp": "Q1",
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            {
              "end": "2012-12-31",
              "val": 480000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
              "fp": "Q2",
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              "filed": "2014-07-24"
            },
            {
              "end": "2012-12-31",
              "val": 480000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-03-31",
              "val": 606000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
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            {
              "end": "2013-03-31",
              "val": 606000000,
              "accn": "0000006201-14-000011",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-24",
              "frame": "CY2013Q1I"
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            {
              "end": "2013-06-30",
              "val": 604000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18"
            },
            {
              "end": "2013-06-30",
              "val": 604000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24",
              "frame": "CY2013Q2I"
            },
            {
              "end": "2013-09-30",
              "val": 717000000,
              "accn": "0000006201-13-000089",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17"
            },
            {
              "end": "2013-09-30",
              "val": 717000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2013-12-31",
              "val": 1140000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            },
            {
              "end": "2013-12-31",
              "val": 1140000000,
              "accn": "0000006201-14-000011",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-24"
            },
            {
              "end": "2013-12-31",
              "val": 1140000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
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              "filed": "2014-07-24"
            },
            {
              "end": "2013-12-31",
              "val": 1140000000,
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              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23",
              "frame": "CY2013Q4I"
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            {
              "end": "2014-03-31",
              "val": 1259000000,
              "accn": "0000006201-14-000011",
              "fy": 2014,
              "fp": "Q1",
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              "filed": "2014-04-24",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2014-06-30",
              "val": 1210000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
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              "filed": "2014-07-24",
              "frame": "CY2014Q2I"
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            {
              "end": "2014-09-30",
              "val": 1178000000,
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              "fy": 2014,
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              "frame": "CY2014Q3I"
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      "CashAndCashEquivalentsPeriodIncreaseDecrease": {
        "label": "Cash and Cash Equivalents, Period Increase (Decrease)",
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              "form": "10-K",
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              "frame": "CY2008"
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            {
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              "val": 0,
              "accn": "0000950123-10-066894",
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            {
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              "end": "2009-09-30",
              "val": -20000000,
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              "filed": "2010-10-20"
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            {
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              "val": -38000000,
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              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-16"
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            {
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              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2009"
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            {
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              "end": "2010-03-31",
              "val": 36000000,
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            {
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              "filed": "2010-10-20"
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            {
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              "filed": "2011-02-16"
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            {
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              "val": 15000000,
              "accn": "0001193125-12-063516",
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              "filed": "2012-02-15"
            },
            {
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              "val": 15000000,
              "accn": "0000006201-13-000023",
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              "filed": "2013-02-20"
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            {
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              "fy": 2012,
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              "filed": "2013-04-16",
              "frame": "CY2010"
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            {
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              "val": 118000000,
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              "fy": 2011,
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            {
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              "val": 118000000,
              "accn": "0001193125-12-169778",
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              "form": "10-Q",
              "filed": "2012-04-19",
              "frame": "CY2011Q1"
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            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": 150000000,
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              "filed": "2011-07-20"
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            {
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              "val": 150000000,
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            {
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            {
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              "end": "2011-09-30",
              "val": 136000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
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              "filed": "2012-10-17"
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              "filed": "2012-02-15"
            },
            {
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              "end": "2011-12-31",
              "val": 115000000,
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              "fy": 2012,
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              "filed": "2013-02-20"
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            {
              "start": "2011-01-01",
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              "val": 115000000,
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              "filed": "2013-04-16"
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            {
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              "val": 115000000,
              "accn": "0000006201-14-000004",
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              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2011"
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            {
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              "val": 92000000,
              "accn": "0001193125-12-169778",
              "fy": 2012,
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              "filed": "2013-04-18",
              "frame": "CY2012Q1"
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            {
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              "end": "2012-06-30",
              "val": 88000000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18"
            },
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": 88000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 225000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 225000000,
              "accn": "0000006201-13-000089",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 197000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 197000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 197000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-03-31",
              "val": 126000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18"
            },
            {
              "start": "2013-01-01",
              "end": "2013-03-31",
              "val": 126000000,
              "accn": "0000006201-14-000011",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-24",
              "frame": "CY2013Q1"
            },
            {
              "start": "2013-01-01",
              "end": "2013-06-30",
              "val": 124000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18"
            },
            {
              "start": "2013-01-01",
              "end": "2013-06-30",
              "val": 124000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24"
            },
            {
              "start": "2013-01-01",
              "end": "2013-09-30",
              "val": 237000000,
              "accn": "0000006201-13-000089",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17"
            },
            {
              "start": "2013-01-01",
              "end": "2013-09-30",
              "val": 237000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 660000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-03-31",
              "val": 119000000,
              "accn": "0000006201-14-000011",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-24",
              "frame": "CY2014Q1"
            },
            {
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              "end": "2014-06-30",
              "val": 70000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24"
            },
            {
              "start": "2014-01-01",
              "end": "2014-09-30",
              "val": 38000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23"
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      },
      "CashCashEquivalentsAndShortTermInvestments": {
        "label": "Cash, Cash Equivalents, and Short-term Investments",
        "description": "Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.",
        "units": {
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              "accn": "0000006201-20-000066",
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            {
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              "fy": 2020,
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            {
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              "accn": "0000006201-20-000101",
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        "label": "Debt Conversion, Converted Instrument, Amount",
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        "label": "Debt Instrument, Basis Spread on Variable Rate",
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              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetPriorServiceCostCreditBeforeTax": {
        "label": "Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, Prior Service Cost (Credit), before Tax",
        "description": "Amount, before tax, of accumulated other comprehensive (income) loss for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).",
        "units": {
          "USD": [
            {
              "end": "2014-12-31",
              "val": 2000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2014Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanAmortizationOfNetPriorServiceCostCredit": {
        "label": "Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit) (Deprecated 2013-01-31)",
        "description": "The amounts in accumulated other comprehensive income related to prior service cost or credit expected to be recognized as components of net periodic benefit cost over the next fiscal year that follows the most recent annual statement of financial position presented.",
        "units": {
          "USD": [
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 29000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 9000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011"
            }
          ]
        }
      },
      "DefinedBenefitPlanAssetsTransferredToFromPlan": {
        "label": "Defined Benefit Plan, Plan Assets, Increase (Decrease) for Assets Transferred to (from) Plan",
        "description": "Amount of increase (decrease) in plan assets of defined benefit plan from assets transferred into (from) plan.",
        "units": {
          "USD": [
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 24000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2015"
            }
          ]
        }
      },
      "DefinedBenefitPlanAssumptionsUsedCalculatingNetPeriodicBenefitCostExpectedLongTermReturnOnAssets": {
        "label": "Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets",
        "description": "Weighted average rate of return on plan assets, reflecting average rate of earnings expected on existing plan assets and expected contributions, used to determine net periodic benefit cost of defined benefit plan.",
        "units": {
          "pure": [
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              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 0.0825,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0.08,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0.08,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 0.08,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2013"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 0.08,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 0.08,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 0.08,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 0.08,
              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-17",
              "frame": "CY2020"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 0.08,
              "accn": "0000006201-22-000026",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22",
              "frame": "CY2021"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 0.08,
              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22",
              "frame": "CY2022"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 0.08,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21",
              "frame": "CY2023"
            }
          ]
        }
      },
      "DefinedBenefitPlanContributionsByEmployer": {
        "label": "Defined Benefit Plan, Plan Assets, Contributions by Employer",
        "description": "Amount of contribution received by defined benefit plan from employer which increases plan assets.",
        "units": {
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            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 6500000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 6500000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-04-12",
              "end": "2012-04-13",
              "val": 86000000,
              "accn": "0001193125-12-169778",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-19"
            },
            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": 86000000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18"
            },
            {
              "start": "2012-04-01",
              "end": "2012-06-30",
              "val": 86000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17",
              "frame": "CY2012Q2"
            },
            {
              "start": "2012-07-01",
              "end": "2012-09-30",
              "val": 86000000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18"
            },
            {
              "start": "2012-07-01",
              "end": "2012-09-30",
              "val": 86000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17",
              "frame": "CY2012Q3"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 272000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 272000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012"
            },
            {
              "start": "2012-10-01",
              "end": "2012-12-31",
              "val": 86000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17",
              "frame": "CY2012Q4"
            },
            {
              "start": "2013-01-01",
              "end": "2013-03-31",
              "val": 33000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18",
              "frame": "CY2013Q1"
            },
            {
              "start": "2017-04-01",
              "end": "2017-06-30",
              "val": 279000000,
              "accn": "0001193125-17-239325",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-07-28",
              "frame": "CY2017Q2"
            },
            {
              "start": "2017-01-01",
              "end": "2017-09-30",
              "val": 281000000,
              "accn": "0001628280-17-010177",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-10-26"
            },
            {
              "start": "2018-01-01",
              "end": "2018-03-31",
              "val": 155000000,
              "accn": "0000006201-18-000016",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-26",
              "frame": "CY2018Q1"
            },
            {
              "start": "2018-01-01",
              "end": "2018-06-30",
              "val": 311000000,
              "accn": "0000006201-18-000027",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-07-26"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": 467000000,
              "accn": "0000006201-18-000039",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-25"
            },
            {
              "start": "2019-01-01",
              "end": "2019-03-31",
              "val": 364000000,
              "accn": "0000006201-19-000023",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-26",
              "frame": "CY2019Q1"
            },
            {
              "start": "2019-01-01",
              "end": "2019-06-30",
              "val": 1200000000,
              "accn": "0000006201-19-000053",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-25"
            },
            {
              "start": "2019-01-01",
              "end": "2019-09-30",
              "val": 1200000000,
              "accn": "0000006201-19-000067",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24"
            }
          ]
        }
      },
      "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.",
        "units": {
          "USD": [
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": -251000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -63000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -63000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            }
          ]
        }
      },
      "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": {
          "USD": [
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 64000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": -65000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 60000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 50000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 51000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 43000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 40000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019"
            }
          ]
        }
      },
      "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": {
          "USD": [
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              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": -22000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -16000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -16000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            }
          ]
        }
      },
      "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": {
          "USD": [
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 3000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": -3000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 3000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 3000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 2000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 2000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 1000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019"
            }
          ]
        }
      },
      "DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnAccumulatedPostretirementBenefitObligation": {
        "label": "Defined Benefit Plan, Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation",
        "description": "Amount of increase in accumulated postretirement benefit obligation from one-percentage-point increase in assumed health care cost trend rate.",
        "units": {
          "USD": [
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 248000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 60000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 60000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 65000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 65000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 61000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 53000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 54000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 47000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 40000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019"
            }
          ]
        }
      },
      "DefinedBenefitPlanEffectOfOnePercentagePointIncreaseOnServiceAndInterestCostComponents": {
        "label": "Defined Benefit Plan, Effect of One Percentage Point Increase on Service and Interest Cost Components",
        "description": "Amount of increase in service and interest cost components of net periodic postretirement benefit cost from one-percentage-point increase in assumed health care cost trend rate.",
        "units": {
          "USD": [
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 20000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 15000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 15000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 3000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 3000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 3000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 3000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 2000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 2000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 1000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019"
            }
          ]
        }
      },
      "DefinedBenefitPlanEffectOfSettlementsAndCurtailmentsOnAccumulatedBenefitObligation": {
        "label": "Defined Benefit Plan, Effect of Settlements and Curtailments on Accumulated Benefit Obligation (Deprecated 2017-01-31)",
        "description": "For pension plans, the amount of Increase or Decrease in the accumulated benefit obligation related to the effects of a settlement or curtailment.",
        "units": {
          "USD": [
            {
              "end": "2012-09-30",
              "val": -6600000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17",
              "frame": "CY2012Q3I"
            }
          ]
        }
      },
      "DefinedBenefitPlanEquitySecurities": {
        "label": "Defined Benefit Plan, Equity Securities (Deprecated 2012-01-31)",
        "description": "The percentage of the fair value of equity securities to the fair value of total plan assets held as of the measurement date.",
        "units": {
          "pure": [
            {
              "end": "2010-12-31",
              "val": 0.27,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 0.27,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearOne": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payments in Year One (Deprecated 2012-01-31)",
        "description": "The amount of the benefits expected to be paid in Year 1.",
        "units": {
          "USD": [
            {
              "end": "2011-06-30",
              "val": 520000000,
              "accn": "0001193125-11-192475",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-20",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 520000000,
              "accn": "0001193125-11-274936",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-19",
              "frame": "CY2011Q3I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureEmployerContributionsNextFiscalYear": {
        "label": "Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year",
        "description": "Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year.",
        "units": {
          "USD": [
            {
              "end": "2017-12-31",
              "val": 42000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 786000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 196000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 697000000,
              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-17",
              "frame": "CY2020Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanFairValueOfPlanAssets": {
        "label": "Defined Benefit Plan, Plan Assets, Amount",
        "description": "Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 7773000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 8132000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanForeignCurrencyExchangeRateChangesPlanAssets": {
        "label": "Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets (Deprecated 2017-01-31)",
        "description": "The amount of increase or decrease in plan assets attributed to foreign currency changes. The effects of foreign currency exchange rate changes that are to be disclosed are those applicable to plans of a foreign operation whose functional currency is not the reporting currency.",
        "units": {
          "USD": [
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 2000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2010"
            }
          ]
        }
      },
      "DefinedBenefitPlanFundedStatusOfPlan": {
        "label": "Defined Benefit Plan, Funded (Unfunded) Status of Plan",
        "description": "Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 234000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 205000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanHealthCareCostTrendRateAssumedForNextFiscalYear": {
        "label": "Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year (Deprecated 2017-01-31)",
        "description": "The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.",
        "units": {
          "pure": [
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 0.08,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 0.075,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2011"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 0.075,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 0.075,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0.07,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0.07,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2012"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0.07,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 0.065,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2013"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 0.065,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 0.0525,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2014"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 0.0525,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 0.0521,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2015"
            }
          ]
        }
      },
      "DefinedBenefitPlanPlanAmendments": {
        "label": "Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment",
        "description": "Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan.",
        "units": {
          "USD": [
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -1900000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -1900000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -1900000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -1900000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -1900000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -1900000000,
              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-17"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -1900000000,
              "accn": "0000006201-22-000026",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22",
              "frame": "CY2012"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": -313000000,
              "accn": "0000006201-22-000026",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22",
              "frame": "CY2020"
            },
            {
              "start": "2020-10-01",
              "end": "2020-12-31",
              "val": -313000000,
              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-17",
              "frame": "CY2020Q4"
            }
          ]
        }
      },
      "DefinedBenefitPlanRecognizedNetGainLossDueToCurtailments": {
        "label": "Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment",
        "description": "Amount of gain (loss) recognized in net periodic benefit (cost) credit from event reducing expected years of future service of present employees or eliminating accrual of defined benefits for some or all future services of present employees.",
        "units": {
          "USD": [
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 0,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 0,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20",
              "frame": "CY2011"
            }
          ]
        }
      },
      "DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments": {
        "label": "Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments (Deprecated 2012-01-31)",
        "description": "The aggregate amount of net gain (loss) recognized in net periodic benefit cost due to settlements and curtailments. Curtailments result from an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services. Settlements result from an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include (a) making lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and (b) purchasing nonparticipating annuity contracts to cover vested benefits.",
        "units": {
          "USD": [
            {
              "start": "2012-07-01",
              "end": "2012-09-30",
              "val": 1800000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q3"
            },
            {
              "start": "2012-07-01",
              "end": "2012-09-30",
              "val": 1800000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2012-07-01",
              "end": "2012-09-30",
              "val": 1800000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17"
            }
          ]
        }
      },
      "DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1": {
        "label": "Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment",
        "description": "Amount of gain (loss) recognized in net periodic benefit (cost) credit from settlement and curtailment.",
        "units": {
          "USD": [
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 1800000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            },
            {
              "start": "2012-07-01",
              "end": "2012-09-30",
              "val": 1800000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2012Q3"
            }
          ]
        }
      },
      "DefinedBenefitPlansEstimatedFutureEmployerContributionsInCurrentFiscalYear": {
        "label": "Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year (Deprecated 2017-01-31)",
        "description": "Amount of employer's best estimate of contributions expected to be paid to the plan in the current remaining fiscal period.",
        "units": {
          "USD": [
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 171000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2014"
            }
          ]
        }
      },
      "DefinedBenefitPlansEstimatedFutureEmployerContributionsInNextFiscalYear": {
        "label": "Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year (Deprecated 2017-01-31)",
        "description": "Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.",
        "units": {
          "USD": [
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 120000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2013"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 25000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2016"
            }
          ]
        }
      },
      "DefinedBenefitPlanUltimateHealthCareCostTrendRate": {
        "label": "Defined Benefit Plan, Ultimate Health Care Cost Trend Rate (Deprecated 2017-01-31)",
        "description": "The ultimate trend rate for health care costs.",
        "units": {
          "pure": [
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 0.045,
              "accn": "0001193125-12-063516",
              "fy": 2011,
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              "form": "10-K",
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              "form": "10-Q",
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              "form": "10-Q",
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              "frame": "CY2013Q2"
            },
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              "start": "2013-01-01",
              "end": "2013-09-30",
              "val": 2000000,
              "accn": "0000006201-13-000089",
              "fy": 2013,
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              "form": "10-Q",
              "filed": "2013-10-17"
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              "end": "2013-09-30",
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              "form": "10-Q",
              "filed": "2014-10-23"
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            {
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              "val": 25000000,
              "accn": "0000006201-13-000089",
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              "form": "10-Q",
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              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2013"
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        "label": "Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net",
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            {
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            {
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            {
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              "end": "2013-06-30",
              "val": -12000000,
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              "val": -13000000,
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      },
      "DerivativeInstrumentsGainLossRecognizedInIncomeNet": {
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      },
      "DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet": {
        "label": "Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net (Deprecated 2018-01-31)",
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        "units": {
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              "form": "10-K",
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            {
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              "form": "10-K",
              "filed": "2023-02-22",
              "frame": "CY2021Q4I"
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            {
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              "form": "10-K",
              "filed": "2023-02-22"
            },
            {
              "end": "2022-12-31",
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              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
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              "frame": "CY2022Q4I"
            },
            {
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              "accn": "0000006201-24-000010",
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              "form": "10-K",
              "filed": "2024-02-21"
            },
            {
              "end": "2023-12-31",
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              "accn": "0000006201-25-000010",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19",
              "frame": "CY2023Q4I"
            },
            {
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              "accn": "0000006201-25-000010",
              "fy": 2024,
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              "form": "10-K",
              "filed": "2025-02-19"
            },
            {
              "end": "2024-12-31",
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              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2024Q4I"
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            {
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              "accn": "0000006201-26-000014",
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              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "FinanceLeaseLiabilityPaymentsDue": {
        "label": "Finance Lease, Liability, Payment, Due",
        "description": "Amount of lessee's undiscounted obligation for lease payments for finance lease.",
        "units": {
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              "val": 871000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 810000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 675000000,
              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-17",
              "frame": "CY2020Q4I"
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            {
              "end": "2021-12-31",
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              "fy": 2021,
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              "form": "10-K",
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              "frame": "CY2021Q4I"
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            {
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              "accn": "0000006201-23-000018",
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              "form": "10-K",
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              "frame": "CY2022Q4I"
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            {
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              "accn": "0000006201-24-000010",
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              "filed": "2024-02-21",
              "frame": "CY2023Q4I"
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            {
              "end": "2024-12-31",
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              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19",
              "frame": "CY2024Q4I"
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            {
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              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025Q4I"
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          ]
        }
      },
      "FinanceLeaseLiabilityPaymentsDueAfterYearFive": {
        "label": "Finance Lease, Liability, to be Paid, after Year Five",
        "description": "Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
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              "val": 282000000,
              "accn": "0000006201-19-000009",
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              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018Q4I"
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              "accn": "0000006201-20-000023",
              "fy": 2019,
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              "form": "10-K",
              "filed": "2020-02-19",
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              "accn": "0000006201-21-000014",
              "fy": 2020,
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              "accn": "0000006201-24-000010",
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              "form": "10-K",
              "filed": "2024-02-21",
              "frame": "CY2023Q4I"
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              "end": "2024-12-31",
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              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19",
              "frame": "CY2024Q4I"
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              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025Q4I"
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          ]
        }
      },
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        "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": [
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              "end": "2018-12-31",
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              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018Q4I"
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              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019Q4I"
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              "fy": 2020,
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              "form": "10-K",
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              "fy": 2021,
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              "form": "10-K",
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              "frame": "CY2021Q4I"
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              "end": "2022-12-31",
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              "accn": "0000006201-23-000018",
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              "form": "10-K",
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              "accn": "0000006201-24-000010",
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              "form": "10-K",
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              "frame": "CY2023Q4I"
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              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19",
              "frame": "CY2024Q4I"
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            {
              "end": "2025-12-31",
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              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025Q4I"
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          ]
        }
      },
      "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": [
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              "end": "2018-12-31",
              "val": 105000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018Q4I"
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            {
              "end": "2019-12-31",
              "val": 116000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019Q4I"
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              "accn": "0000006201-21-000014",
              "fy": 2020,
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              "form": "10-K",
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              "form": "10-K",
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              "frame": "CY2021Q4I"
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              "end": "2022-12-31",
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              "accn": "0000006201-23-000018",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22",
              "frame": "CY2022Q4I"
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              "end": "2023-12-31",
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              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21",
              "frame": "CY2023Q4I"
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              "end": "2024-12-31",
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              "accn": "0000006201-25-000010",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19",
              "frame": "CY2024Q4I"
            },
            {
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              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025Q4I"
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          ]
        }
      },
      "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": [
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              "end": "2018-12-31",
              "val": 122000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018Q4I"
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            {
              "end": "2019-12-31",
              "val": 110000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019Q4I"
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              "end": "2020-12-31",
              "val": 120000000,
              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-17",
              "frame": "CY2020Q4I"
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              "end": "2021-12-31",
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              "accn": "0000006201-22-000026",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22",
              "frame": "CY2021Q4I"
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            {
              "end": "2022-12-31",
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              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22",
              "frame": "CY2022Q4I"
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              "end": "2023-12-31",
              "val": 71000000,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21",
              "frame": "CY2023Q4I"
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              "end": "2024-12-31",
              "val": 77000000,
              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 102000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025Q4I"
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          ]
        }
      },
      "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": [
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              "end": "2018-12-31",
              "val": 118000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
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              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 132000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019Q4I"
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              "end": "2020-12-31",
              "val": 114000000,
              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-17",
              "frame": "CY2020Q4I"
            },
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              "end": "2021-12-31",
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              "accn": "0000006201-22-000026",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22",
              "frame": "CY2021Q4I"
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              "end": "2022-12-31",
              "val": 141000000,
              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22",
              "frame": "CY2022Q4I"
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              "end": "2023-12-31",
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              "accn": "0000006201-24-000010",
              "fy": 2023,
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              "form": "10-K",
              "filed": "2024-02-21",
              "frame": "CY2023Q4I"
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              "end": "2024-12-31",
              "val": 112000000,
              "accn": "0000006201-25-000010",
              "fy": 2024,
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              "form": "10-K",
              "filed": "2025-02-19",
              "frame": "CY2024Q4I"
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              "val": 110000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025Q4I"
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          ]
        }
      },
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        "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": {
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              "val": 120000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
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              "end": "2019-12-31",
              "val": 128000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019Q4I"
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              "end": "2020-12-31",
              "val": 136000000,
              "accn": "0000006201-21-000014",
              "fy": 2020,
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              "form": "10-K",
              "filed": "2021-02-17",
              "frame": "CY2020Q4I"
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              "accn": "0000006201-22-000026",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22",
              "frame": "CY2021Q4I"
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            {
              "end": "2022-12-31",
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              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22",
              "frame": "CY2022Q4I"
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              "end": "2023-12-31",
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              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21",
              "frame": "CY2023Q4I"
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              "end": "2024-12-31",
              "val": 150000000,
              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 152000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025Q4I"
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          ]
        }
      },
      "FinanceLeaseLiabilityUndiscountedExcessAmount": {
        "label": "Finance Lease, Liability, Undiscounted Excess Amount",
        "description": "Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for finance lease.",
        "units": {
          "USD": [
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              "end": "2018-12-31",
              "val": 177000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018Q4I"
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              "end": "2019-12-31",
              "val": 140000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019Q4I"
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            {
              "end": "2020-12-31",
              "val": 103000000,
              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-17",
              "frame": "CY2020Q4I"
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              "end": "2021-12-31",
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              "accn": "0000006201-22-000026",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22",
              "frame": "CY2021Q4I"
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              "end": "2022-12-31",
              "val": 131000000,
              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 104000000,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
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              "filed": "2024-02-21",
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            },
            {
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              "val": 177000000,
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              "form": "10-K",
              "filed": "2025-02-19",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025Q4I"
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        }
      },
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        "description": "Amount of cash outflow for principal payment on finance lease.",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 78000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 78000000,
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              "form": "10-K",
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              "frame": "CY2018"
            },
            {
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              "end": "2019-12-31",
              "val": 83000000,
              "accn": "0000006201-20-000023",
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              "form": "10-K",
              "filed": "2020-02-19"
            },
            {
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            {
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              "form": "10-K",
              "filed": "2022-02-22",
              "frame": "CY2019"
            },
            {
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              "end": "2020-12-31",
              "val": 114000000,
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              "fy": 2020,
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              "form": "10-K",
              "filed": "2021-02-17"
            },
            {
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              "end": "2020-12-31",
              "val": 114000000,
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              "fy": 2021,
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              "form": "10-K",
              "filed": "2022-02-22"
            },
            {
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              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22",
              "frame": "CY2020"
            },
            {
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              "end": "2021-12-31",
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              "accn": "0000006201-22-000026",
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              "filed": "2022-02-22"
            },
            {
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              "form": "10-K",
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              "filed": "2024-02-21",
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              "filed": "2023-02-22"
            },
            {
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              "form": "10-K",
              "filed": "2024-02-21"
            },
            {
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              "val": 190000000,
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              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21"
            },
            {
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              "accn": "0000006201-25-000010",
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              "form": "10-K",
              "filed": "2025-02-19"
            },
            {
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              "filed": "2026-02-18",
              "frame": "CY2023"
            },
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              "form": "10-K",
              "filed": "2025-02-19"
            },
            {
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              "filed": "2026-02-18",
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              "form": "10-K",
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              "frame": "CY2025"
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              "filed": "2019-02-25"
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              "filed": "2023-02-22"
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              "filed": "2024-02-21",
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            },
            {
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              "filed": "2025-02-19",
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      },
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            {
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              "filed": "2025-02-19"
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      },
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              "filed": "2023-02-22",
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              "form": "10-K",
              "filed": "2024-02-21",
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            },
            {
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              "end": "2022-12-31",
              "val": 143000000,
              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22"
            },
            {
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              "val": 143000000,
              "accn": "0000006201-24-000010",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21"
            },
            {
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              "end": "2022-12-31",
              "val": 143000000,
              "accn": "0000006201-25-000010",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19",
              "frame": "CY2022"
            },
            {
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              "end": "2023-12-31",
              "val": 128000000,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 128000000,
              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 128000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2023"
            },
            {
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              "end": "2024-12-31",
              "val": 132000000,
              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": 132000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2024"
            },
            {
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              "val": 128000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
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              "form": "10-K",
              "filed": "2026-02-18",
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          ]
        }
      },
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        "label": "Finance Lease, Right-of-Use Asset, before Accumulated Amortization",
        "description": "Amount, before accumulated amortization, of right-of-use asset from finance lease.",
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              "filed": "2021-02-17"
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              "fy": 2021,
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              "filed": "2022-02-22",
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              "filed": "2017-02-22",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 41000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 41000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 41000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 41000000,
              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-17",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-12-31",
              "val": 41000000,
              "accn": "0000006201-22-000026",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-12-31",
              "val": 7000000,
              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 7000000,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 6000000,
              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 7000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "FiniteLivedIntangibleAssetsAmortizationExpenseYearFive": {
        "label": "Finite-Lived Intangible Asset, Expected Amortization, Year Five",
        "description": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized 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": "2013-12-31",
              "val": 40000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 42000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 42000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 41000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 41000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 7000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 7000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 7000000,
              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-17",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-12-31",
              "val": 6000000,
              "accn": "0000006201-22-000026",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-12-31",
              "val": 6000000,
              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 6000000,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 6000000,
              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 7000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "FiniteLivedIntangibleAssetsAmortizationExpenseYearFour": {
        "label": "Finite-Lived Intangible Asset, Expected Amortization, Year Four",
        "description": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized 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": "2013-12-31",
              "val": 44000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 42000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 42000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 41000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 41000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 41000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 7000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 7000000,
              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-17",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-12-31",
              "val": 7000000,
              "accn": "0000006201-22-000026",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-12-31",
              "val": 6000000,
              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 6000000,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 6000000,
              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 7000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "FiniteLivedIntangibleAssetsAmortizationExpenseYearThree": {
        "label": "Finite-Lived Intangible Asset, Expected Amortization, Year Three",
        "description": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized 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": "2013-12-31",
              "val": 48000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 46000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 42000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 41000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 41000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 41000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 41000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 7000000,
              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-17",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-12-31",
              "val": 7000000,
              "accn": "0000006201-22-000026",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-12-31",
              "val": 7000000,
              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 6000000,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 6000000,
              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 7000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo": {
        "label": "Finite-Lived Intangible Asset, Expected Amortization, Year Two",
        "description": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized 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": "2013-12-31",
              "val": 54000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 50000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 46000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 41000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 41000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 41000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 41000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 41000000,
              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-17",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-12-31",
              "val": 7000000,
              "accn": "0000006201-22-000026",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-12-31",
              "val": 7000000,
              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 7000000,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 6000000,
              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 7000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "FiniteLivedIntangibleAssetsGross": {
        "label": "Finite-Lived Intangible Assets, Gross",
        "description": "Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.",
        "units": {
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              "end": "2010-12-31",
              "val": 697000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 675000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 675000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "end": "2011-12-31",
              "val": 675000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2012-12-31",
              "val": 670000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 670000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            }
          ]
        }
      },
      "FiniteLivedIntangibleAssetsNet": {
        "label": "Finite-Lived Intangible Assets, Net",
        "description": "Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 224000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 186000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "end": "2011-12-31",
              "val": 186000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2011-12-31",
              "val": 186000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 161000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2012-12-31",
              "val": 161000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16"
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              "filed": "2025-02-19"
            },
            {
              "end": "2024-12-31",
              "val": 43521000000,
              "accn": "0000006201-25-000023",
              "fy": 2025,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2025-04-24"
            },
            {
              "end": "2024-12-31",
              "val": 43521000000,
              "accn": "0000006201-25-000038",
              "fy": 2025,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2025-07-24"
            },
            {
              "end": "2024-12-31",
              "val": 43521000000,
              "accn": "0000006201-25-000052",
              "fy": 2025,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2025-10-23"
            },
            {
              "end": "2024-12-31",
              "val": 43521000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-03-31",
              "val": 43738000000,
              "accn": "0000006201-25-000023",
              "fy": 2025,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2025-04-24",
              "frame": "CY2025Q1I"
            },
            {
              "end": "2025-06-30",
              "val": 44219000000,
              "accn": "0000006201-25-000038",
              "fy": 2025,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2025-07-24",
              "frame": "CY2025Q2I"
            },
            {
              "end": "2025-09-30",
              "val": 44994000000,
              "accn": "0000006201-25-000052",
              "fy": 2025,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2025-10-23",
              "frame": "CY2025Q3I"
            },
            {
              "end": "2025-12-31",
              "val": 46597000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18"
            },
            {
              "end": "2025-12-31",
              "val": 46597000000,
              "accn": "0000006201-26-000032",
              "fy": 2026,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2026-04-23"
            },
            {
              "end": "2025-12-31",
              "val": 46597000000,
              "accn": "0000006201-26-000052",
              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-23",
              "frame": "CY2025Q4I"
            },
            {
              "end": "2026-03-31",
              "val": 47303000000,
              "accn": "0000006201-26-000032",
              "fy": 2026,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2026-04-23",
              "frame": "CY2026Q1I"
            },
            {
              "end": "2026-06-30",
              "val": 47908000000,
              "accn": "0000006201-26-000052",
              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-23",
              "frame": "CY2026Q2I"
            }
          ]
        }
      },
      "FlightEquipmentOwnedAccumulatedDepreciation": {
        "label": "Flight Equipment Owned, Accumulated Depreciation (Deprecated 2016-01-31)",
        "description": "The cumulative amount of depreciation (related to long-lived flight assets owned by the entity and used in the entity's principle business operations, including owned aircraft, as well as capitalized improvements) that has been recognized in the income statement.",
        "units": {
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            {
              "end": "2010-12-31",
              "val": 8081000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 7095000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 7095000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "end": "2011-12-31",
              "val": 7095000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2012-12-31",
              "val": 7624000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 7624000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            }
          ]
        }
      },
      "FlightEquipmentOwnedGross": {
        "label": "Flight Equipment Owned, Gross (Deprecated 2016-01-31)",
        "description": "The gross amount of long-lived, depreciable flight assets owned by the entity and used in the entity's principle business operations, including owned aircraft as well as capitalized improvements.",
        "units": {
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              "end": "2010-12-31",
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              "accn": "0001193125-12-063516",
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              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
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              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "end": "2011-12-31",
              "val": 11041000000,
              "accn": "0001193125-12-169778",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-19"
            },
            {
              "end": "2011-12-31",
              "val": 18136000000,
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              "fy": 2012,
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              "filed": "2013-02-20"
            },
            {
              "end": "2011-12-31",
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              "accn": "0001193125-13-155496",
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              "fp": "FY",
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              "filed": "2013-04-16",
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            {
              "end": "2012-03-31",
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              "fy": 2012,
              "fp": "Q1",
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              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-12-31",
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              "fy": 2012,
              "fp": "FY",
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              "filed": "2013-02-20"
            },
            {
              "end": "2012-12-31",
              "val": 17934000000,
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            },
            {
              "end": "2012-12-31",
              "val": 18221000000,
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              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
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            },
            {
              "end": "2013-12-31",
              "val": 23730000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
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              "filed": "2014-02-28"
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            {
              "end": "2013-12-31",
              "val": 23730000000,
              "accn": "0000006201-14-000011",
              "fy": 2014,
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              "filed": "2014-04-24"
            },
            {
              "end": "2013-12-31",
              "val": 23730000000,
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            {
              "end": "2013-12-31",
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            {
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              "filed": "2015-02-25",
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            {
              "end": "2014-03-31",
              "val": 24687000000,
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              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-24",
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            },
            {
              "end": "2014-06-30",
              "val": 26113000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24",
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            },
            {
              "end": "2014-09-30",
              "val": 27212000000,
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            },
            {
              "end": "2014-12-31",
              "val": 28213000000,
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              "fy": 2014,
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              "filed": "2015-02-25"
            },
            {
              "end": "2014-12-31",
              "val": 28213000000,
              "accn": "0001193125-15-145178",
              "fy": 2015,
              "fp": "Q1",
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              "filed": "2015-04-24"
            },
            {
              "end": "2014-12-31",
              "val": 28213000000,
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              "fy": 2015,
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              "form": "10-Q",
              "filed": "2015-07-24"
            },
            {
              "end": "2014-12-31",
              "val": 28213000000,
              "accn": "0001193125-15-351246",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-23",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-03-31",
              "val": 29273000000,
              "accn": "0001193125-15-145178",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-24",
              "frame": "CY2015Q1I"
            },
            {
              "end": "2015-06-30",
              "val": 30829000000,
              "accn": "0001193125-15-261937",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
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            },
            {
              "end": "2015-09-30",
              "val": 31872000000,
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              "fy": 2015,
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              "form": "10-Q",
              "filed": "2015-10-23",
              "frame": "CY2015Q3I"
            }
          ]
        }
      },
      "FlightEquipmentOwnedNet": {
        "label": "Flight Equipment Owned, Net (Deprecated 2016-01-31)",
        "description": "The net amount of long-lived, depreciable flight assets owned by the entity and used in the entity's principle business operations, including owned aircraft as well as capitalized improvements.",
        "units": {
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              "end": "2010-12-31",
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              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 12264000000,
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              "filed": "2011-10-19"
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            {
              "end": "2011-09-30",
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              "fy": 2011,
              "fp": "Q3",
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              "filed": "2011-10-19",
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            {
              "end": "2011-12-31",
              "val": 11041000000,
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              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2011Q4I"
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            {
              "end": "2011-12-31",
              "val": 11041000000,
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              "fy": 2011,
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              "filed": "2012-02-15"
            },
            {
              "end": "2011-12-31",
              "val": 11041000000,
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              "fy": 2012,
              "fp": "FY",
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              "filed": "2013-02-20"
            },
            {
              "end": "2011-12-31",
              "val": 11041000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17"
            },
            {
              "end": "2011-12-31",
              "val": 11041000000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18"
            },
            {
              "end": "2012-06-30",
              "val": 10636000000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 10492000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 10310000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16"
            },
            {
              "end": "2012-12-31",
              "val": 10310000000,
              "accn": "0000006201-13-000089",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 10310000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18"
            },
            {
              "end": "2012-12-31",
              "val": 10310000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18"
            },
            {
              "end": "2012-12-31",
              "val": 10310000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2013-03-31",
              "val": 10216000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2013-06-30",
              "val": 10510000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18",
              "frame": "CY2013Q2I"
            },
            {
              "end": "2013-09-30",
              "val": 10445000000,
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              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17",
              "frame": "CY2013Q3I"
            }
          ]
        }
      },
      "ForeignCurrencyTransactionGainLossBeforeTax": {
        "label": "Foreign Currency Transaction Gain (Loss), before Tax",
        "description": "Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.",
        "units": {
          "USD": [
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              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": -17000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -41000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": -56000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2013"
            }
          ]
        }
      },
      "ForeignCurrencyTransactionGainLossRealized": {
        "label": "Foreign Currency Transaction Gain (Loss), Realized",
        "description": "Amount before tax of foreign currency transaction realized gain (loss) recognized in the income statement.",
        "units": {
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              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 41000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 56000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": -56000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 114000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": -114000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": -114000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": -751000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": -751000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": -751000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 1000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 1000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
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              "filed": "2018-02-21"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 1000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": -4000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": -4000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
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              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2013-01-01",
              "end": "2013-03-31",
              "val": 7000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18",
              "frame": "CY2013Q1"
            },
            {
              "start": "2013-01-01",
              "end": "2013-06-30",
              "val": -11000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18"
            },
            {
              "start": "2013-04-01",
              "end": "2013-06-30",
              "val": -18000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18",
              "frame": "CY2013Q2"
            }
          ]
        }
      },
      "GainLossOnDispositionOfAssets": {
        "label": "Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property",
        "description": "Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.",
        "units": {
          "USD": [
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 8000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2014"
            }
          ]
        }
      },
      "GainLossOnDispositionOfIntangibleAssets": {
        "label": "Gain (Loss) on Disposition of Intangible Assets",
        "description": "Amount of gain (loss) on sale or disposal of intangible assets.",
        "units": {
          "USD": [
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 67000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 265000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2014"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 309000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24"
            }
          ]
        }
      },
      "GainLossOnSaleOfOtherAssets": {
        "label": "Gain (Loss) on Disposition of Other Assets",
        "description": "Amount of gain (loss) on sale or disposal of other assets.",
        "units": {
          "USD": [
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 0,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 67000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 67000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2013"
            },
            {
              "start": "2013-10-01",
              "end": "2013-12-31",
              "val": -67000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2013Q4"
            },
            {
              "start": "2014-01-01",
              "end": "2014-03-31",
              "val": 309000000,
              "accn": "0000006201-14-000011",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-24"
            },
            {
              "start": "2014-01-01",
              "end": "2014-03-31",
              "val": 309000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24"
            },
            {
              "start": "2014-01-01",
              "end": "2014-03-31",
              "val": 309000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23"
            },
            {
              "start": "2014-01-01",
              "end": "2014-03-31",
              "val": 309000000,
              "accn": "0001193125-15-145178",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-24",
              "frame": "CY2014Q1"
            },
            {
              "start": "2014-01-01",
              "end": "2014-06-30",
              "val": 309000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24"
            },
            {
              "start": "2014-01-01",
              "end": "2014-06-30",
              "val": 309000000,
              "accn": "0001193125-15-261937",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-24"
            },
            {
              "start": "2014-01-01",
              "end": "2014-09-30",
              "val": 309000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23"
            },
            {
              "start": "2014-01-01",
              "end": "2014-09-30",
              "val": 309000000,
              "accn": "0001193125-15-351246",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-23"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 309000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2014"
            }
          ]
        }
      },
      "GainLossRelatedToLitigationSettlement": {
        "label": "Gain (Loss) Related to Litigation Settlement",
        "description": "Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process.",
        "units": {
          "USD": [
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 0,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": -45000000,
              "accn": "0000006201-19-000067",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24"
            },
            {
              "start": "2018-07-01",
              "end": "2018-09-30",
              "val": 0,
              "accn": "0000006201-19-000067",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24",
              "frame": "CY2018Q3"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": -45000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2018"
            },
            {
              "start": "2019-01-01",
              "end": "2019-09-30",
              "val": 53000000,
              "accn": "0000006201-19-000067",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24"
            },
            {
              "start": "2019-07-01",
              "end": "2019-09-30",
              "val": 53000000,
              "accn": "0000006201-19-000067",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24",
              "frame": "CY2019Q3"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 53000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019"
            }
          ]
        }
      },
      "GainOnSaleOfInvestments": {
        "label": "Gain on Sale of Investments",
        "description": "The difference between the carrying value and the sale price of an investment. A gain would be recognized when the sale price of the investment is greater than the carrying value of the investment. This element refers to the Gain included in earnings and not to the cash proceeds of the sale.",
        "units": {
          "USD": [
            {
              "start": "2015-01-01",
              "end": "2015-09-30",
              "val": 22000000,
              "accn": "0001193125-16-742263",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-20"
            },
            {
              "start": "2015-01-01",
              "end": "2015-09-30",
              "val": 22000000,
              "accn": "0001193125-15-351246",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-23"
            }
          ]
        }
      },
      "GainsLossesOnExtinguishmentOfDebt": {
        "label": "Gain (Loss) on Extinguishment of Debt",
        "description": "Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.",
        "units": {
          "USD": [
            {
              "start": "2013-01-01",
              "end": "2013-09-30",
              "val": -75000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23"
            },
            {
              "start": "2014-01-01",
              "end": "2014-09-30",
              "val": -54000000,
              "accn": "0001193125-15-351246",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-23"
            },
            {
              "start": "2014-07-01",
              "end": "2014-09-30",
              "val": -54000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23",
              "frame": "CY2014Q3"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": -31000000,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21",
              "frame": "CY2021"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": -3000000,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": -3000000,
              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19",
              "frame": "CY2022"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": -267000000,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": -267000000,
              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": -267000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2023"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": -9000000,
              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": -9000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2024"
            },
            {
              "start": "2025-01-01",
              "end": "2025-12-31",
              "val": -20000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025"
            }
          ]
        }
      },
      "GainsLossesOnSalesOfAssets": {
        "label": "Gain (Loss) on Disposition of Assets for Financial Service Operations",
        "description": "Amount of gain (loss) on sale or disposal of assets utilized in financial service operations.",
        "units": {
          "USD": [
            {
              "start": "2014-10-01",
              "end": "2014-12-31",
              "val": 8000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2014Q4"
            }
          ]
        }
      },
      "GeneralFairValueHedgeInformationDollarOffsetThresholdMaximum": {
        "label": "General Fair Value Hedge Information, Dollar Offset Threshold, Maximum (Deprecated 2016-01-31)",
        "description": "The upper end of the range of quotients represented as a percentage derived by dividing the change in value of a hedging instrument by the change in the value of the hedged item over the assessment period.",
        "units": {
          "pure": [
            {
              "end": "2011-12-31",
              "val": 1.25,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 1.25,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 1.25,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            }
          ]
        }
      },
      "GeneralFairValueHedgeInformationDollarOffsetThresholdMinimum": {
        "label": "General Fair Value Hedge Information, Dollar Offset Threshold, Minimum (Deprecated 2016-01-31)",
        "description": "The lower end of the range of quotients represented as a percentage derived by dividing the change in value of a hedging instrument by the change in the value of the hedged item over the assessment period.",
        "units": {
          "pure": [
            {
              "end": "2011-12-31",
              "val": 0.8,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 0.8,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 0.8,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            }
          ]
        }
      },
      "GeneralFairValueHedgeInformationMinimumRSquarePercentage": {
        "label": "General Fair Value Hedge Information, Minimum R Square, Percentage",
        "description": "The correlation coefficient between the hypothetical instrument and the hedged item used in determination of the effectiveness of a hedging relationship.",
        "units": {
          "pure": [
            {
              "end": "2011-12-31",
              "val": 0.8,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 0.8,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 0.8,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            }
          ]
        }
      },
      "Goodwill": {
        "label": "Goodwill",
        "description": "Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.",
        "units": {
          "USD": [
            {
              "end": "2012-12-31",
              "val": 0,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-09",
              "val": 4086000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            },
            {
              "end": "2013-12-09",
              "val": 4091000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25"
            },
            {
              "end": "2013-12-31",
              "val": 4086000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            },
            {
              "end": "2013-12-31",
              "val": 4086000000,
              "accn": "0000006201-14-000011",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-24"
            },
            {
              "end": "2013-12-31",
              "val": 4086000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24"
            },
            {
              "end": "2013-12-31",
              "val": 4086000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23"
            },
            {
              "end": "2013-12-31",
              "val": 4086000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-03-31",
              "val": 4089000000,
              "accn": "0000006201-14-000011",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-24",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2014-06-30",
              "val": 4089000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24",
              "frame": "CY2014Q2I"
            },
            {
              "end": "2014-09-30",
              "val": 4089000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2014-12-31",
              "val": 4091000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25"
            },
            {
              "end": "2014-12-31",
              "val": 4091000000,
              "accn": "0001193125-15-145178",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-24"
            },
            {
              "end": "2014-12-31",
              "val": 4091000000,
              "accn": "0001193125-15-261937",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-24"
            },
            {
              "end": "2014-12-31",
              "val": 4091000000,
              "accn": "0001193125-15-351246",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-23"
            },
            {
              "end": "2014-12-31",
              "val": 4091000000,
              "accn": "0001193125-16-474605",
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      },
      "ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill": {
        "label": "Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)",
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              "accn": "0000006201-24-000010",
              "fy": 2023,
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              "form": "10-K",
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              "frame": "CY2025"
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      },
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        "label": "Impairment of Long-Lived Assets to be Disposed of",
        "description": "The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.",
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              "val": -626000000,
              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22",
              "frame": "CY2020"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 461000000,
              "accn": "0000006201-22-000026",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 461000000,
              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 461000000,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21",
              "frame": "CY2021"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 585000000,
              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 585000000,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21",
              "frame": "CY2022"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 873000000,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21",
              "frame": "CY2023"
            }
          ]
        }
      },
      "IncreaseDecreaseInAccountsReceivable": {
        "label": "Increase (Decrease) in Accounts Receivable",
        "description": "The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.",
        "units": {
          "USD": [
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 222000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 93000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 93000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 160000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 160000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 160000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": -352000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": -352000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": -352000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 160000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 160000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 160000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 190000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 190000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 190000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": -222000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": -222000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": -222000000,
              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-17",
              "frame": "CY2018"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": -73000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": -73000000,
              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-17"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": -73000000,
              "accn": "0000006201-22-000026",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22",
              "frame": "CY2019"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": -538000000,
              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-17"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": -538000000,
              "accn": "0000006201-22-000026",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": -538000000,
              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22",
              "frame": "CY2020"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 304000000,
              "accn": "0000006201-22-000026",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 304000000,
              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 304000000,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21",
              "frame": "CY2021"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 637000000,
              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 637000000,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 637000000,
              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19",
              "frame": "CY2022"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": -95000000,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": -95000000,
              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": -95000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2023"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": -35000000,
              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": -35000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2024"
            },
            {
              "start": "2025-01-01",
              "end": "2025-12-31",
              "val": 74000000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025"
            }
          ]
        }
      },
      "IncreaseDecreaseInAirTrafficLiability": {
        "label": "Increase (Decrease) in Air Traffic Liability (Deprecated 2011-01-31)",
        "description": "The net change during the reporting period in the amount of unearned revenue by an airline industry company. This unearned revenue includes tickets sold but not yet recognized as revenue (which occurs when transportation is provided or the ticket expires) and the estimated incremental cost for points or miles outstanding and awards that expect to be redeemed through customer loyalty programs.",
        "units": {
          "USD": [
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": -277000000,
              "accn": "0000950123-11-014726",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-16",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": -277000000,
              "accn": "0000950123-11-014726",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-16",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 225000000,
              "accn": "0000950123-11-014726",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-16",
              "frame": "CY2010"
            }
          ]
        }
      },
      "IncreaseDecreaseInAirTrafficLiability1": {
        "label": "Increase (Decrease) in Air Traffic Liability",
        "description": "The increase (decrease) during the reporting period in the amount of unearned revenue related to tickets sold but not yet recognized as revenue.",
        "units": {
          "USD": [
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": -277000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 225000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 225000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 225000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2010"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 567000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 567000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 567000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 374000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 301000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 301000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 161000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 161000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 150000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 150000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 150000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": -97000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": -97000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": -97000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": -505000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": -505000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": -505000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 164000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 164000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 66000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21",
              "frame": "CY2017"
            }
          ]
        }
      },
      "IncreaseDecreaseInCommodityContractAssetsAndLiabilities": {
        "label": "Increase (Decrease) in Commodity Contract Assets and Liabilities",
        "description": "The increase (decrease) during the reporting period in the assets (liabilities) created through trading commodity-based derivative instruments.",
        "units": {
          "USD": [
            {
              "start": "2008-01-01",
              "end": "2008-12-31",
              "val": 940000000,
              "accn": "0000950123-11-014726",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-16",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": -561000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2009"
            },
            {
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              "val": -561000000,
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            },
            {
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              "val": -87000000,
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              "fy": 2012,
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              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2010"
            },
            {
              "start": "2010-01-01",
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              "val": -87000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
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            {
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              "val": -87000000,
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              "filed": "2013-02-20"
            },
            {
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              "val": 73000000,
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              "filed": "2013-04-16"
            },
            {
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            },
            {
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              "end": "2011-12-31",
              "val": 73000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2011"
            },
            {
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              "accn": "0000006201-13-000023",
              "fy": 2012,
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            },
            {
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            },
            {
              "start": "2012-01-01",
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            {
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            {
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              "end": "2013-12-31",
              "val": -1000000,
              "accn": "0001193125-16-474605",
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              "filed": "2016-02-24",
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              "val": -1000000,
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          ]
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            {
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              "end": "2013-12-31",
              "val": 38000000,
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              "fy": 2015,
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              "form": "10-K",
              "filed": "2016-02-24",
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            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": -229000000,
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              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25"
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            {
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              "end": "2014-12-31",
              "val": -229000000,
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              "fy": 2015,
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              "filed": "2016-02-24"
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            {
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              "fy": 2016,
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              "filed": "2017-02-22",
              "frame": "CY2014"
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              "filed": "2017-02-22"
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            {
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              "end": "2015-12-31",
              "val": -295000000,
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              "filed": "2018-02-21",
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            },
            {
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              "filed": "2017-02-22"
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              "filed": "2018-02-21",
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            {
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              "filed": "2018-02-21",
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        }
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            {
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              "frame": "CY2011"
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              "filed": "2013-02-20"
            },
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              "end": "2012-12-31",
              "val": -17000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
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              "filed": "2013-04-16",
              "frame": "CY2012"
            },
            {
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              "end": "2012-12-31",
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              "fy": 2012,
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              "form": "10-K",
              "filed": "2013-02-20"
            }
          ]
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      },
      "IncreaseDecreaseInOtherCurrentAssets": {
        "label": "Increase (Decrease) in Other Current Assets",
        "description": "Amount of increase (decrease) in current assets classified as other.",
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              "filed": "2013-02-20"
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            {
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              "filed": "2013-04-16",
              "frame": "CY2010"
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            {
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              "end": "2011-12-31",
              "val": -116000000,
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              "filed": "2013-02-20"
            },
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              "filed": "2013-04-16"
            },
            {
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              "end": "2011-12-31",
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              "accn": "0000006201-14-000004",
              "fy": 2013,
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              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
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              "accn": "0000006201-13-000023",
              "fy": 2012,
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              "filed": "2013-02-20"
            },
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              "end": "2014-12-31",
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              "filed": "2019-02-25",
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            {
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              "end": "2019-12-31",
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            {
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              "end": "2020-12-31",
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            {
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            },
            {
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              "val": 402000000,
              "accn": "0000006201-22-000026",
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            {
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              "val": -5000000,
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            },
            {
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              "val": -300000000,
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              "filed": "2026-02-18",
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          ]
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      },
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        "label": "Increase (Decrease) in Receivables",
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              "val": 222000000,
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              "val": 222000000,
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              "filed": "2013-02-20"
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            {
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              "val": 93000000,
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              "fy": 2013,
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          ]
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      },
      "IncreaseDecreaseInRestrictedCashAndInvestments": {
        "label": "Increase (Decrease) in Restricted Cash and Investments",
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            {
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            {
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            {
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            {
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            {
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              "fy": 2024,
              "fp": "FY",
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            },
            {
              "start": "2024-01-01",
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              "val": 1121000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
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              "form": "10-K",
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            {
              "start": "2025-01-01",
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              "val": 370000,
              "accn": "0000006201-25-000038",
              "fy": 2025,
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              "filed": "2025-07-24"
            },
            {
              "start": "2025-01-01",
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              "val": 370000,
              "accn": "0000006201-26-000052",
              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-23"
            },
            {
              "start": "2025-04-01",
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              "val": 240000,
              "accn": "0000006201-25-000038",
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            },
            {
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              "frame": "CY2025Q2"
            },
            {
              "start": "2025-01-01",
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              "val": 563000,
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            },
            {
              "start": "2025-07-01",
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              "val": 0,
              "accn": "0000006201-25-000052",
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              "form": "10-Q",
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            },
            {
              "start": "2025-01-01",
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              "val": 763000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
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              "form": "10-K",
              "filed": "2026-02-18",
              "frame": "CY2025"
            },
            {
              "start": "2026-01-01",
              "end": "2026-06-30",
              "val": 0,
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            },
            {
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              "val": 423000,
              "accn": "0000006201-26-000052",
              "fy": 2026,
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              "form": "10-Q",
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              "frame": "CY2026Q2"
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          ]
        }
      },
      "IndefiniteLivedDomesticSlotsAndRoutes": {
        "label": "Indefinite-Lived Domestic Slots and Routes",
        "description": "Carrying amount, (original cost adjusted for any previously recognized amortization and impairment) as of the balance sheet date, of domestic slots, route authorities, airport operating and gate lease rights and related intangibles.",
        "units": {
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              "accn": "0001193125-12-063516",
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              "frame": "CY2010Q4I"
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            {
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              "filed": "2011-10-19"
            },
            {
              "end": "2011-09-30",
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            {
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              "fy": 2012,
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            {
              "end": "2011-12-31",
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              "filed": "2012-02-15"
            },
            {
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              "filed": "2013-02-20"
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            {
              "end": "2011-12-31",
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              "filed": "2012-10-17"
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            {
              "end": "2011-12-31",
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              "form": "10-Q",
              "filed": "2012-04-19",
              "frame": "CY2012Q1I"
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            {
              "end": "2012-06-30",
              "val": 173000000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
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            {
              "end": "2012-09-30",
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            {
              "end": "2012-12-31",
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              "filed": "2013-04-16"
            },
            {
              "end": "2012-12-31",
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              "frame": "CY2012Q4I"
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            {
              "end": "2012-12-31",
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            {
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            {
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            {
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              "filed": "2013-04-18",
              "frame": "CY2013Q1I"
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            {
              "end": "2013-06-30",
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              "filed": "2013-07-18",
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            {
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          ]
        }
      },
      "IndefiniteLivedIntangibleAssets": {
        "label": "Indefinite-lived Intangible Assets (Deprecated 2012-01-31)",
        "description": "Carrying amount of intangible assets, excluding goodwill, which have a projected indefinite period of benefit (hence are not amortized), allocated to the reportable segment. These assets, acquired either individually or as part of a group of assets, in either an asset acquisition or business combination, are assessed at least annually for impairment. Examples may include trade secrets, contractual rights, trade names, and licensing agreements.",
        "units": {
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          ]
        }
      },
      "IndefiniteLivedIntangibleAssetsExcludingGoodwill": {
        "label": "Indefinite-lived Intangible Assets (Excluding Goodwill)",
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              "filed": "2014-02-28"
            },
            {
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              "filed": "2015-02-25"
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              "filed": "2016-02-24"
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              "filed": "2017-02-22",
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              "filed": "2017-02-22"
            },
            {
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              "filed": "2018-02-21",
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            {
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              "accn": "0000006201-18-000009",
              "fy": 2017,
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              "form": "10-K",
              "filed": "2018-02-21"
            },
            {
              "end": "2017-12-31",
              "val": 1900000000,
              "accn": "0000006201-19-000009",
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            {
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              "filed": "2019-02-25"
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            {
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              "fy": 2019,
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              "filed": "2020-02-19"
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            {
              "end": "2019-12-31",
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              "fy": 2020,
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            {
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              "accn": "0000006201-20-000066",
              "fy": 2020,
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            {
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            {
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              "fy": 2020,
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              "filed": "2021-02-17"
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            {
              "end": "2020-12-31",
              "val": 1800000000,
              "accn": "0000006201-22-000026",
              "fy": 2021,
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              "filed": "2022-02-22",
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            {
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              "accn": "0000006201-22-000026",
              "fy": 2021,
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              "form": "10-K",
              "filed": "2022-02-22"
            },
            {
              "end": "2021-12-31",
              "val": 1800000000,
              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
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              "filed": "2023-02-22",
              "frame": "CY2021Q4I"
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            {
              "end": "2022-12-31",
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              "accn": "0000006201-23-000018",
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            },
            {
              "end": "2022-12-31",
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            {
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              "filed": "2024-02-21"
            },
            {
              "end": "2023-12-31",
              "val": 1900000000,
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            {
              "end": "2024-12-31",
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              "filed": "2025-02-19"
            },
            {
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          ]
        }
      },
      "IndefiniteLivedInternationalSlotsAndRoutes": {
        "label": "Indefinite-Lived International Slots and Routes",
        "description": "Carrying amount, (original cost adjusted for any previously recognized amortization and impairment) as of the balance sheet date, of international slots, route authorities, airport operating and gate lease rights and related intangibles.",
        "units": {
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            {
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              "filed": "2011-10-19"
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            {
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            {
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              "filed": "2013-04-16",
              "frame": "CY2011Q4I"
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            {
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            {
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              "filed": "2013-02-20"
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            {
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            {
              "end": "2011-12-31",
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            {
              "end": "2012-03-31",
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              "accn": "0001193125-12-169778",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-19",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
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              "accn": "0000006201-12-000069",
              "fy": 2012,
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              "form": "10-Q",
              "filed": "2012-07-18",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 708000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
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              "form": "10-K/A",
              "filed": "2013-04-16"
            },
            {
              "end": "2012-12-31",
              "val": 708000000,
              "accn": "0000006201-13-000089",
              "fy": 2013,
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              "form": "10-K",
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            {
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              "filed": "2013-10-17"
            },
            {
              "end": "2012-12-31",
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              "filed": "2013-07-18"
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            {
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              "filed": "2013-04-18"
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            {
              "end": "2012-12-31",
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              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2013-03-31",
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            {
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      },
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        "label": "Liabilities Subject to Compromise, Employee and Deemed Claims",
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        "label": "Liabilities Subject to Compromise, Other Liabilities",
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            {
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              "filed": "2013-04-16"
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              "frame": "CY2012Q4I"
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        "label": "Litigation Settlement, Expense",
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      },
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        "label": "Long-term Debt, Fair Value",
        "description": "The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.",
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              "filed": "2011-10-19",
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            {
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            {
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        "label": "Long-Term Debt, Maturity, Year Five",
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            {
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              "filed": "2013-04-16",
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            {
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              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2014Q4I"
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              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2018Q4I"
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      },
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              "frame": "CY2019Q4I"
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              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
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              "form": "10-K",
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              "frame": "CY2022Q4I"
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            {
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      },
      "LongTermDebtPercentageBearingFixedInterestRate": {
        "label": "Long-term Debt, Percentage Bearing Fixed Interest, Percentage Rate",
        "description": "The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate.",
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              "form": "10-Q",
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              "fy": 2011,
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              "form": "10-Q",
              "filed": "2011-10-19",
              "frame": "CY2011Q3I"
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        }
      },
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        "label": "Long-term Purchase Commitment, Amount",
        "description": "The minimum amount the entity agreed to spend under the long-term purchase commitment.",
        "units": {
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              "val": -774000000,
              "accn": "0000006201-26-000052",
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      "NotesPayable": {
        "label": "Notes Payable",
        "description": "Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.",
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      },
      "NotionalAmountOfInterestRateDerivatives": {
        "label": "Notional Amount of Interest Rate Derivatives (Deprecated 2013-01-31)",
        "description": "Aggregate notional amount of interest rate derivatives, which relates to the currency amount specified in the interest rate derivative instruments.",
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      "NumberOfAircraftOperated": {
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        "description": "Number of aircraft operated by the carrier.",
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          "segment": [
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      "NumberOfReportingUnits": {
        "label": "Number of Reporting Units",
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        "label": "Operating Lease, Liability",
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              "form": "10-Q",
              "filed": "2026-07-23",
              "frame": "CY2026Q2I"
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        "label": "Operating Leases, Future Minimum Payments Due",
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              "filed": "2019-02-25",
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      "OperatingLeasesFutureMinimumPaymentsDueCurrent": {
        "label": "Operating Leases, Future Minimum Payments Due, Next Twelve Months",
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              "fy": 2012,
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              "form": "10-K",
              "filed": "2013-02-20"
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            {
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              "accn": "0001193125-13-155496",
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              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
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              "val": 861000000,
              "accn": "0000006201-13-000040",
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              "filed": "2013-04-18",
              "frame": "CY2013Q1I"
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            {
              "end": "2013-06-30",
              "val": 903000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18",
              "frame": "CY2013Q2I"
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            {
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              "filed": "2014-02-28",
              "frame": "CY2013Q4I"
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              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2014Q4I"
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              "accn": "0001193125-16-474605",
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              "filed": "2016-02-24",
              "frame": "CY2015Q4I"
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            {
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              "val": 1214000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 1159000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
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              "form": "10-K",
              "filed": "2018-02-21"
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              "val": 1398000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2017Q4I"
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              "accn": "0001193125-11-192475",
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              "form": "10-Q",
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              "frame": "CY2011Q2I"
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-19",
              "frame": "CY2011Q3I"
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              "end": "2011-12-31",
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              "accn": "0001193125-12-063516",
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              "accn": "0001193125-12-169778",
              "fy": 2012,
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              "form": "10-Q",
              "filed": "2012-04-19",
              "frame": "CY2012Q1I"
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              "end": "2012-06-30",
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              "accn": "0000006201-12-000069",
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              "fp": "Q2",
              "form": "10-Q",
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              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
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              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 816000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2012-12-31",
              "val": 816000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-03-31",
              "val": 901000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2013-06-30",
              "val": 947000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18",
              "frame": "CY2013Q2I"
            },
            {
              "end": "2013-09-30",
              "val": 1054000000,
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              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2013-12-31",
              "val": 1650000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 1558000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 1643000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2015Q4I"
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            {
              "end": "2016-12-31",
              "val": 1639000000,
              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 1339000000,
              "accn": "0000006201-18-000009",
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              "filed": "2018-02-21"
            },
            {
              "end": "2017-12-31",
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              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2017Q4I"
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      },
      "OperatingLeasesFutureMinimumPaymentsDueInThreeYears": {
        "label": "Operating Leases, Future Minimum Payments, Due in Three Years",
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            {
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            {
              "end": "2013-06-30",
              "val": 1000000000,
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            },
            {
              "end": "2013-09-30",
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            {
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              "fy": 2013,
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            {
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              "filed": "2017-02-22",
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              "form": "10-K",
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              "frame": "CY2017Q4I"
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      },
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        "label": "Operating Leases, Future Minimum Payments, Due in Two Years",
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              "frame": "CY2012Q4I"
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              "filed": "2013-04-18",
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            },
            {
              "end": "2013-06-30",
              "val": 1100000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
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            {
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            {
              "end": "2013-12-31",
              "val": 1934000000,
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              "fy": 2013,
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              "filed": "2014-02-28",
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              "filed": "2015-02-25",
              "frame": "CY2014Q4I"
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            {
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              "frame": "CY2015Q4I"
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              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2016Q4I"
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            {
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              "fy": 2018,
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              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2017Q4I"
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      },
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        "label": "Operating Leases, Future Minimum Payments, Due Thereafter",
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              "filed": "2011-10-19",
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              "filed": "2013-02-20"
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            {
              "end": "2012-12-31",
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              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-03-31",
              "val": 5100000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
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              "filed": "2013-04-18",
              "frame": "CY2013Q1I"
            },
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              "end": "2013-06-30",
              "val": 5700000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18",
              "frame": "CY2013Q2I"
            },
            {
              "end": "2013-09-30",
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              "accn": "0000006201-13-000089",
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              "form": "10-Q",
              "filed": "2013-10-17",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2013-12-31",
              "val": 6664000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
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              "fy": 2014,
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              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2014Q4I"
            },
            {
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              "accn": "0001193125-16-474605",
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              "frame": "CY2015Q4I"
            },
            {
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              "accn": "0001193125-17-051216",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 3266000000,
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              "filed": "2018-02-21"
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              "fy": 2018,
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              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2017Q4I"
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      },
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        "label": "Operating Leases, Rent Expense, Net",
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              "val": 1100000000,
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              "end": "2019-12-31",
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              "accn": "0000006201-20-000023",
              "fy": 2019,
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              "filed": "2021-02-17",
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              "accn": "0000006201-21-000014",
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              "end": "2020-12-31",
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              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-12-31",
              "val": 0.063,
              "accn": "0000006201-22-000026",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-22"
            },
            {
              "end": "2021-12-31",
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              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-12-31",
              "val": 0.074,
              "accn": "0000006201-23-000018",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-22"
            },
            {
              "end": "2022-12-31",
              "val": 0.074,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 0.076,
              "accn": "0000006201-24-000010",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-21"
            },
            {
              "end": "2023-12-31",
              "val": 0.076,
              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19",
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            {
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              "filed": "2015-10-23"
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              "fy": 2013,
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              "filed": "2014-02-28"
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            {
              "end": "2013-12-31",
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              "accn": "0000006201-14-000011",
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            {
              "end": "2014-03-31",
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              "filed": "2012-02-15"
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              "filed": "2012-04-19"
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              "end": "2011-12-31",
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              "form": "10-Q",
              "filed": "2012-07-18"
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            {
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            {
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              "filed": "2013-04-16"
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            {
              "end": "2012-12-31",
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              "filed": "2013-07-18"
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              "form": "10-Q",
              "filed": "2013-10-17"
            },
            {
              "end": "2012-12-31",
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              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
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              "filed": "2014-02-28",
              "frame": "CY2012Q4I"
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            {
              "end": "2013-03-31",
              "val": 524000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
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              "form": "10-Q",
              "filed": "2013-04-18",
              "frame": "CY2013Q1I"
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            {
              "end": "2013-06-30",
              "val": 576000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
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              "val": -9000000,
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              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24"
            },
            {
              "start": "2014-01-01",
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              "val": -24000000,
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              "fy": 2014,
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          ]
        }
      },
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              "frame": "CY2008"
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            {
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              "val": -299000000,
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              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-07-21"
            },
            {
              "start": "2009-01-01",
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              "val": 1025000000,
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              "fy": 2010,
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            {
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              "frame": "CY2009"
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            {
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              "fy": 2011,
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            {
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            {
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              "filed": "2010-10-20"
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              "fy": 2010,
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              "form": "10-K",
              "filed": "2011-02-16"
            },
            {
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              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
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              "val": 82000000,
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              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
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              "val": 82000000,
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              "filed": "2013-04-16",
              "frame": "CY2010"
            },
            {
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              "val": 1190000000,
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              "fy": 2011,
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            {
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              "form": "10-Q",
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            {
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              "filed": "2011-07-20"
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            {
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            },
            {
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              "filed": "2011-10-19"
            },
            {
              "start": "2011-01-01",
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              "val": -336000000,
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              "fp": "Q3",
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              "filed": "2012-10-17"
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            {
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              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
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            },
            {
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              "end": "2011-12-31",
              "val": -610000000,
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              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2011-01-01",
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              "val": -610000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
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              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2011"
            },
            {
              "start": "2012-01-01",
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              "val": 726000000,
              "accn": "0001193125-12-169778",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-19"
            },
            {
              "start": "2012-01-01",
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              "val": 726000000,
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              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-01-01",
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              "val": 890000000,
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              "form": "10-Q",
              "filed": "2012-07-18"
            },
            {
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              "end": "2012-06-30",
              "val": 890000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 0,
              "accn": "0000006201-12-000099",
              "fy": 2012,
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              "filed": "2012-10-17"
            },
            {
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              "end": "2012-09-30",
              "val": 85000000,
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              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -306000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
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              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
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              "val": -306000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-03-31",
              "val": 226000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18"
            },
            {
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              "end": "2013-03-31",
              "val": 226000000,
              "accn": "0000006201-14-000011",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-24",
              "frame": "CY2013Q1"
            },
            {
              "start": "2013-01-01",
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              "val": 2194000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18"
            },
            {
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              "end": "2013-06-30",
              "val": 2194000000,
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              "fy": 2014,
              "fp": "Q2",
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              "filed": "2014-07-24"
            },
            {
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              "filed": "2013-10-17"
            },
            {
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            },
            {
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              "end": "2014-03-31",
              "val": 294000000,
              "accn": "0000006201-14-000011",
              "fy": 2014,
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              "form": "10-Q",
              "filed": "2014-04-24",
              "frame": "CY2014Q1"
            },
            {
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              "end": "2014-06-30",
              "val": 138000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24"
            },
            {
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              "val": -1390000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
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        }
      },
      "PaymentsForRepurchaseOfCommonStock": {
        "label": "Payments for Repurchase of Common Stock",
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            },
            {
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              "val": 0,
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              "form": "10-Q",
              "filed": "2015-04-24",
              "frame": "CY2014Q1"
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              "accn": "0000006201-14-000014",
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              "filed": "2015-10-23"
            },
            {
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              "end": "2014-12-31",
              "val": 1062000000,
              "accn": "0001193125-15-061145",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25"
            },
            {
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              "end": "2014-12-31",
              "val": 1062000000,
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              "fy": 2015,
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              "form": "10-K",
              "filed": "2016-02-24"
            },
            {
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              "form": "10-K",
              "filed": "2017-02-22",
              "frame": "CY2014"
            },
            {
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            },
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            {
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            },
            {
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            },
            {
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            {
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              "filed": "2018-02-21",
              "frame": "CY2015"
            },
            {
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            {
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            {
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            },
            {
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            {
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              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2016"
            },
            {
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              "filed": "2018-04-26",
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            {
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            {
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            {
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              "filed": "2018-02-21",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-03-31",
              "val": 32291000000,
              "accn": "0001193125-17-140927",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-04-27",
              "frame": "CY2017Q1I"
            },
            {
              "end": "2017-06-30",
              "val": 32993000000,
              "accn": "0001193125-17-239325",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-07-28",
              "frame": "CY2017Q2I"
            },
            {
              "end": "2017-09-30",
              "val": 33311000000,
              "accn": "0001628280-17-010177",
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-10-26",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2017-12-31",
              "val": 34156000000,
              "accn": "0000006201-18-000009",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-21"
            },
            {
              "end": "2017-12-31",
              "val": 34156000000,
              "accn": "0000006201-18-000016",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-26"
            },
            {
              "end": "2017-12-31",
              "val": 34156000000,
              "accn": "0000006201-18-000027",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-07-26"
            },
            {
              "end": "2017-12-31",
              "val": 34156000000,
              "accn": "0000006201-18-000039",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-25"
            },
            {
              "end": "2017-12-31",
              "val": 34156000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-03-31",
              "val": 34333000000,
              "accn": "0000006201-18-000016",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-26",
              "frame": "CY2018Q1I"
            },
            {
              "end": "2018-06-30",
              "val": 34424000000,
              "accn": "0000006201-18-000027",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-07-26",
              "frame": "CY2018Q2I"
            },
            {
              "end": "2018-09-30",
              "val": 34223000000,
              "accn": "0000006201-18-000039",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-25",
              "frame": "CY2018Q3I"
            },
            {
              "end": "2018-12-31",
              "val": 34098000000,
              "accn": "0000006201-19-000009",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-25"
            },
            {
              "end": "2018-12-31",
              "val": 34098000000,
              "accn": "0000006201-19-000023",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-26"
            },
            {
              "end": "2018-12-31",
              "val": 34098000000,
              "accn": "0000006201-19-000053",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-25"
            },
            {
              "end": "2018-12-31",
              "val": 34098000000,
              "accn": "0000006201-19-000067",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24"
            },
            {
              "end": "2018-12-31",
              "val": 34098000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-03-31",
              "val": 34410000000,
              "accn": "0000006201-19-000023",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-26",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 34702000000,
              "accn": "0000006201-19-000053",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-25",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 34619000000,
              "accn": "0000006201-19-000067",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 34995000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19"
            },
            {
              "end": "2019-12-31",
              "val": 34995000000,
              "accn": "0000006201-20-000066",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-04-30"
            },
            {
              "end": "2019-12-31",
              "val": 34995000000,
              "accn": "0000006201-20-000089",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-07-23"
            },
            {
              "end": "2019-12-31",
              "val": 34995000000,
              "accn": "0000006201-20-000101",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-10-22",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-03-31",
              "val": 34206000000,
              "accn": "0000006201-20-000066",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-04-30",
              "frame": "CY2020Q1I"
            },
            {
              "end": "2020-06-30",
              "val": 33351000000,
              "accn": "0000006201-20-000089",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-07-23",
              "frame": "CY2020Q2I"
            },
            {
              "end": "2020-09-30",
              "val": 32256000000,
              "accn": "0000006201-20-000101",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-10-22",
              "frame": "CY2020Q3I"
            }
          ]
        }
      },
      "PropertyPlantAndEquipmentOther": {
        "label": "Property, Plant and Equipment, Other, Gross",
        "description": "Amount before accumulated depreciation, depletion and amortization of other physical assets used in the normal conduct of business to produce goods and services and not intended for resale.",
        "units": {
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            {
              "end": "2009-12-31",
              "val": 2277000000,
              "accn": "0000950123-10-066894",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-07-21"
            },
            {
              "end": "2009-12-31",
              "val": 5158000000,
              "accn": "0000950123-11-014726",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-16",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-06-30",
              "val": 2236000000,
              "accn": "0000950123-10-066894",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2010-07-21",
              "frame": "CY2010Q2I"
            },
            {
              "end": "2010-12-31",
              "val": 5173000000,
              "accn": "0000950123-11-014726",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-16"
            },
            {
              "end": "2010-12-31",
              "val": 5173000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 5131000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "end": "2011-12-31",
              "val": 5131000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2011-12-31",
              "val": 5131000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 5101000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2012-12-31",
              "val": 5101000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16"
            },
            {
              "end": "2012-12-31",
              "val": 5302000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 5585000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            },
            {
              "end": "2013-12-31",
              "val": 5585000000,
              "accn": "0000006201-14-000011",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-24"
            },
            {
              "end": "2013-12-31",
              "val": 5585000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24"
            },
            {
              "end": "2013-12-31",
              "val": 5585000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23"
            },
            {
              "end": "2013-12-31",
              "val": 5585000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-03-31",
              "val": 5663000000,
              "accn": "0000006201-14-000011",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-24",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2014-06-30",
              "val": 5712000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24",
              "frame": "CY2014Q2I"
            },
            {
              "end": "2014-09-30",
              "val": 5812000000,
              "accn": "0000006201-14-000018",
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2014-12-31",
              "val": 5900000000,
              "accn": "0001193125-15-061145",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-25"
            },
            {
              "end": "2014-12-31",
              "val": 5900000000,
              "accn": "0001193125-15-145178",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-24"
            },
            {
              "end": "2014-12-31",
              "val": 5900000000,
              "accn": "0001193125-15-261937",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-24"
            },
            {
              "end": "2014-12-31",
              "val": 5900000000,
              "accn": "0001193125-15-351246",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-23"
            },
            {
              "end": "2014-12-31",
              "val": 5900000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-03-31",
              "val": 6013000000,
              "accn": "0001193125-15-145178",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-24",
              "frame": "CY2015Q1I"
            },
            {
              "end": "2015-06-30",
              "val": 6132000000,
              "accn": "0001193125-15-261937",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-24",
              "frame": "CY2015Q2I"
            },
            {
              "end": "2015-09-30",
              "val": 6262000000,
              "accn": "0001193125-15-351246",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-23",
              "frame": "CY2015Q3I"
            },
            {
              "end": "2015-12-31",
              "val": 6402000000,
              "accn": "0001193125-16-474605",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-24",
              "frame": "CY2015Q4I"
            }
          ]
        }
      },
      "PropertyPlantAndEquipmentOtherAccumulatedDepreciation": {
        "label": "Property, Plant and Equipment, Other, Accumulated Depreciation",
        "description": "Amount of accumulated depreciation of long-lived, physical assets used to produce goods and services and not intended for resale, classified as other.",
        "units": {
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            {
              "end": "2010-12-31",
              "val": 2974000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 3005000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "end": "2011-12-31",
              "val": 3005000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2011-12-31",
              "val": 3005000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 3002000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2012-12-31",
              "val": 3002000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16"
            },
            {
              "end": "2012-12-31",
              "val": 10831000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 11133000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28"
            },
            {
              "end": "2013-12-31",
              "val": 11133000000,
              "accn": "0000006201-14-000011",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-24"
            },
            {
              "end": "2013-12-31",
              "val": 11133000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24"
            },
            {
              "end": "2013-12-31",
              "val": 11133000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-03-31",
              "val": 11451000000,
              "accn": "0000006201-14-000011",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-04-24",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2014-06-30",
              "val": 11632000000,
              "accn": "0000006201-14-000014",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-24",
              "frame": "CY2014Q2I"
            },
            {
              "end": "2014-09-30",
              "val": 12033000000,
              "accn": "0000006201-14-000018",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-23",
              "frame": "CY2014Q3I"
            }
          ]
        }
      },
      "PropertyPlantAndEquipmentOtherNet": {
        "label": "Property, Plant and Equipment, Other, Net",
        "description": "Amount after depreciation of long-lived, physical assets used to produce goods and services and not intended for resale, classified as other.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 2199000000,
              "accn": "0001193125-11-274936",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-19"
            },
            {
              "end": "2010-12-31",
              "val": 2199000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-09-30",
              "val": 2117000000,
              "accn": "0001193125-11-274936",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-19",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-12-31",
              "val": 2126000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "end": "2011-12-31",
              "val": 2126000000,
              "accn": "0001193125-12-169778",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-19"
            },
            {
              "end": "2011-12-31",
              "val": 2126000000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18"
            },
            {
              "end": "2011-12-31",
              "val": 2126000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17"
            },
            {
              "end": "2011-12-31",
              "val": 2126000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2011-12-31",
              "val": 2126000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-03-31",
              "val": 2114000000,
              "accn": "0001193125-12-169778",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-19",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": 2076000000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 2066000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 2099000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
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              "filed": "2019-04-26",
              "frame": "CY2019Q1"
            },
            {
              "start": "2019-01-01",
              "end": "2019-06-30",
              "val": 160000000,
              "accn": "0000006201-19-000053",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-25"
            },
            {
              "start": "2019-04-01",
              "end": "2019-06-30",
              "val": 77000000,
              "accn": "0000006201-19-000053",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-25",
              "frame": "CY2019Q2"
            },
            {
              "start": "2019-01-01",
              "end": "2019-09-30",
              "val": 232000000,
              "accn": "0000006201-19-000067",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24"
            },
            {
              "start": "2019-07-01",
              "end": "2019-09-30",
              "val": 72000000,
              "accn": "0000006201-19-000067",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24",
              "frame": "CY2019Q3"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 271000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19",
              "frame": "CY2019"
            },
            {
              "start": "2019-10-01",
              "end": "2019-12-31",
              "val": 39000000,
              "accn": "0000006201-20-000023",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-19"
            },
            {
              "start": "2019-10-01",
              "end": "2019-12-31",
              "val": 39000000,
              "accn": "0000006201-21-000014",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-17",
              "frame": "CY2019Q4"
            }
          ]
        }
      },
      "RestructuringCostsAndAssetImpairmentCharges": {
        "label": "Restructuring Costs and Asset Impairment Charges",
        "description": "Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation.",
        "units": {
          "USD": [
            {
              "start": "2011-10-01",
              "end": "2011-12-31",
              "val": 768000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2011Q4"
            }
          ]
        }
      },
      "RestructuringReserve": {
        "label": "Restructuring Reserve",
        "description": "Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.",
        "units": {
          "USD": [
            {
              "end": "2008-12-31",
              "val": 142000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2008Q4I"
            },
            {
              "end": "2009-12-31",
              "val": 175000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2009-12-31",
              "val": 175000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "end": "2009-12-31",
              "val": 175000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2010-12-31",
              "val": 86000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 86000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "end": "2010-12-31",
              "val": 86000000,
              "accn": "0001193125-11-274936",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-19"
            },
            {
              "end": "2010-12-31",
              "val": 86000000,
              "accn": "0001193125-11-192475",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-20"
            },
            {
              "end": "2010-12-31",
              "val": 86000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2011-06-30",
              "val": 54000000,
              "accn": "0001193125-11-192475",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-20",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 75000000,
              "accn": "0001193125-11-274936",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-19",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-12-31",
              "val": 65000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 65000000,
              "accn": "0001193125-12-169778",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-19"
            },
            {
              "end": "2011-12-31",
              "val": 65000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "end": "2011-12-31",
              "val": 65000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2011-12-31",
              "val": 65000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17"
            },
            {
              "end": "2011-12-31",
              "val": 65000000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18"
            },
            {
              "end": "2012-03-31",
              "val": 23000000,
              "accn": "0001193125-12-169778",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-19",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": 93000000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 236000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 196000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16"
            },
            {
              "end": "2012-12-31",
              "val": 196000000,
              "accn": "0000006201-13-000089",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 196000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18"
            },
            {
              "end": "2012-12-31",
              "val": 196000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18"
            },
            {
              "end": "2012-12-31",
              "val": 196000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "end": "2013-03-31",
              "val": 143000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2013-06-30",
              "val": 67000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18",
              "frame": "CY2013Q2I"
            },
            {
              "end": "2013-09-30",
              "val": 51000000,
              "accn": "0000006201-13-000089",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17",
              "frame": "CY2013Q3I"
            }
          ]
        }
      },
      "RestructuringReserveAccrualAdjustment": {
        "label": "Restructuring Reserve, Accrual Adjustment (Deprecated 2016-01-31)",
        "description": "Amount of (expense) reversal of expense related to a previously accrued restructuring cost liability. Excludes adjustments for costs incurred, costs settled, and foreign currency translation adjustments.",
        "units": {
          "USD": [
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": -2000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 3000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2010"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 3000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 3000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": -1000000,
              "accn": "0001193125-11-192475",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-20"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": 27000000,
              "accn": "0001193125-11-274936",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-19"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 743000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2011"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 743000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 743000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": -29000000,
              "accn": "0001193125-12-169778",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-19",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": -58000000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": -58000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -58000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": -58000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2013-01-01",
              "end": "2013-03-31",
              "val": 0,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18",
              "frame": "CY2013Q1"
            },
            {
              "start": "2013-01-01",
              "end": "2013-06-30",
              "val": -4000000,
              "accn": "0000006201-13-000067",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-07-18"
            },
            {
              "start": "2013-01-01",
              "end": "2013-09-30",
              "val": -4000000,
              "accn": "0000006201-13-000089",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-17"
            },
            {
              "start": "2013-10-01",
              "end": "2013-12-31",
              "val": 74000000,
              "accn": "0000006201-14-000004",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-28",
              "frame": "CY2013Q4"
            }
          ]
        }
      },
      "RestructuringReservePeriodExpense": {
        "label": "Restructuring Reserve, Period Expense (Deprecated 2012-01-31)",
        "description": "Reserve increase representing the amount charged against earnings in the period for a specified incurred and estimated type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.",
        "units": {
          "USD": [
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 171000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2009"
            },
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": 117000000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 329000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 385000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 385000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            }
          ]
        }
      },
      "RestructuringReserveSettledWithCash": {
        "label": "Restructuring Reserve, Settled With Cash (Deprecated 2013-01-31)",
        "description": "Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.",
        "units": {
          "USD": [
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 68000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15",
              "frame": "CY2009"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 92000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2010"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 92000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "start": "2010-01-01",
              "end": "2010-12-31",
              "val": 92000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": 31000000,
              "accn": "0001193125-11-192475",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2011-07-20"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": 38000000,
              "accn": "0001193125-11-274936",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-10-19"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 40000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2011"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 40000000,
              "accn": "0001193125-12-063516",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-15"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 40000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2012-01-01",
              "end": "2012-03-31",
              "val": 2000000,
              "accn": "0001193125-12-169778",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-04-19",
              "frame": "CY2012Q1"
            },
            {
              "start": "2012-01-01",
              "end": "2012-06-30",
              "val": 7000000,
              "accn": "0000006201-12-000069",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-07-18"
            },
            {
              "start": "2012-01-01",
              "end": "2012-09-30",
              "val": 76000000,
              "accn": "0000006201-12-000099",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-10-17"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 172000000,
              "accn": "0001193125-13-155496",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K/A",
              "filed": "2013-04-16",
              "frame": "CY2012"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 172000000,
              "accn": "0000006201-13-000023",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-20"
            },
            {
              "start": "2013-01-01",
              "end": "2013-03-31",
              "val": 61000000,
              "accn": "0000006201-13-000040",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-18",
              "frame": "CY2013Q1"
            }
          ]
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      },
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              "form": "10-K",
              "filed": "2018-02-21"
            },
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              "end": "2016-12-31",
              "val": 1400000,
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              "filed": "2019-02-25",
              "frame": "CY2016"
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              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 1100000,
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              "filed": "2018-02-21"
            },
            {
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              "end": "2017-12-31",
              "val": 1100000,
              "accn": "0000006201-19-000009",
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              "filed": "2019-02-25"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 1100000,
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              "filed": "2020-02-19",
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            {
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              "val": 800000,
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              "filed": "2019-02-25"
            },
            {
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              "end": "2018-12-31",
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              "filed": "2020-02-19"
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            {
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              "end": "2018-12-31",
              "val": 800000,
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              "end": "2019-12-31",
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              "filed": "2020-02-19"
            },
            {
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              "end": "2019-12-31",
              "val": 800000,
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              "filed": "2021-02-17"
            },
            {
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              "val": 800000,
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              "end": "2022-12-31",
              "val": 1200000,
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              "filed": "2023-02-22"
            },
            {
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              "end": "2022-12-31",
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              "filed": "2024-02-21"
            },
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              "end": "2022-12-31",
              "val": 1200000,
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              "filed": "2025-02-19",
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              "end": "2023-12-31",
              "val": 1500000,
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              "filed": "2024-02-21"
            },
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              "filed": "2025-02-19"
            },
            {
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              "end": "2023-12-31",
              "val": 1500000,
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              "filed": "2026-02-18",
              "frame": "CY2023"
            },
            {
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              "end": "2024-12-31",
              "val": 1600000,
              "accn": "0000006201-25-000010",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-19"
            },
            {
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              "end": "2024-12-31",
              "val": 1600000,
              "accn": "0000006201-26-000014",
              "fy": 2025,
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              "filed": "2026-02-18",
              "frame": "CY2024"
            },
            {
              "start": "2025-01-01",
              "end": "2025-12-31",
              "val": 2000000,
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              "filed": "2026-02-18",
              "frame": "CY2025"
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      },
      "ShortTermInvestments": {
        "label": "Short-term Investments",
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