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              "accn": "0001628280-26-010666",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-23"
            },
            {
              "end": "2025-12-31",
              "val": 1286566000,
              "accn": "0001628280-26-026866",
              "fy": 2026,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2026-04-23"
            },
            {
              "end": "2025-12-31",
              "val": 1286566000,
              "accn": "0001628280-26-051079",
              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-30",
              "frame": "CY2025Q4I"
            },
            {
              "end": "2026-03-31",
              "val": 1296154000,
              "accn": "0001628280-26-026866",
              "fy": 2026,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2026-04-23",
              "frame": "CY2026Q1I"
            },
            {
              "end": "2026-06-30",
              "val": 1327084000,
              "accn": "0001628280-26-051079",
              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-30",
              "frame": "CY2026Q2I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesEquitySecurities": {
        "label": "Available-for-sale Securities, Equity Securities",
        "description": "Amount of equity securities categorized neither as held-to-maturity nor as trading.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 594000000,
              "accn": "0001104659-11-049441",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2011-08-30"
            },
            {
              "end": "2010-12-31",
              "val": 594000000,
              "accn": "0001104659-11-060593",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-03"
            },
            {
              "end": "2010-12-31",
              "val": 594000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-06-30",
              "val": 630000000,
              "accn": "0001104659-11-049441",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2011-08-30",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 613000000,
              "accn": "0001104659-11-060593",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-03",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-12-31",
              "val": 589000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "end": "2011-12-31",
              "val": 589000000,
              "accn": "0001104659-12-032634",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-03"
            },
            {
              "end": "2011-12-31",
              "val": 589000000,
              "accn": "0001104659-12-053745",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02"
            },
            {
              "end": "2011-12-31",
              "val": 589000000,
              "accn": "0001104659-12-073242",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-01"
            },
            {
              "end": "2011-12-31",
              "val": 589000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-03-31",
              "val": 647000000,
              "accn": "0001104659-12-032634",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-03",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": 631000000,
              "accn": "0001104659-12-053745",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 653000000,
              "accn": "0001104659-12-073242",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-01",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 1000000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "end": "2012-12-31",
              "val": 1000000000,
              "accn": "0000922621-13-000009",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29"
            },
            {
              "end": "2012-12-31",
              "val": 1000000000,
              "accn": "0000922621-13-000018",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-08-01"
            },
            {
              "end": "2012-12-31",
              "val": 1000000000,
              "accn": "0000922621-13-000028",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-31"
            },
            {
              "end": "2012-12-31",
              "val": 1000000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-27",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-03-31",
              "val": 992000000,
              "accn": "0000922621-13-000009",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2013-06-30",
              "val": 1017000000,
              "accn": "0000922621-13-000018",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-08-01",
              "frame": "CY2013Q2I"
            },
            {
              "end": "2013-09-30",
              "val": 897000000,
              "accn": "0000922621-13-000028",
              "fy": 2013,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2013-10-31",
              "frame": "CY2013Q3I"
            },
            {
              "end": "2013-12-31",
              "val": 869000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-27"
            },
            {
              "end": "2013-12-31",
              "val": 869000000,
              "accn": "0000922621-14-000019",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-05-01"
            },
            {
              "end": "2013-12-31",
              "val": 869000000,
              "accn": "0000922621-14-000029",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-31"
            },
            {
              "end": "2013-12-31",
              "val": 869000000,
              "accn": "0000922621-14-000037",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-30"
            },
            {
              "end": "2013-12-31",
              "val": 869000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-03-31",
              "val": 887000000,
              "accn": "0000922621-14-000019",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-05-01",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2014-06-30",
              "val": 940000000,
              "accn": "0000922621-14-000029",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-31",
              "frame": "CY2014Q2I"
            },
            {
              "end": "2014-09-30",
              "val": 942000000,
              "accn": "0000922621-14-000037",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-30",
              "frame": "CY2014Q3I"
            },
            {
              "end": "2014-12-31",
              "val": 875000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "end": "2014-12-31",
              "val": 875000000,
              "accn": "0000922621-15-000019",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-30"
            },
            {
              "end": "2014-12-31",
              "val": 875000000,
              "accn": "0000922621-15-000032",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-30"
            },
            {
              "end": "2014-12-31",
              "val": 875000000,
              "accn": "0000922621-15-000048",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-29",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-03-31",
              "val": 862000000,
              "accn": "0000922621-15-000019",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-30",
              "frame": "CY2015Q1I"
            },
            {
              "end": "2015-06-30",
              "val": 839000000,
              "accn": "0000922621-15-000032",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-30",
              "frame": "CY2015Q2I"
            },
            {
              "end": "2015-09-30",
              "val": 740000000,
              "accn": "0000922621-15-000048",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-29",
              "frame": "CY2015Q3I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesFairValueDisclosure": {
        "label": "Available-for-sale Securities, Fair Value Disclosure (Deprecated 2013-01-31)",
        "description": "This element represents the portion of the balance sheet assertion valued at fair value by the entity 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. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 8137000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 8137000000,
              "accn": "0001104659-11-060593",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-03"
            },
            {
              "end": "2010-12-31",
              "val": 8137000000,
              "accn": "0001104659-11-049441",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2011-08-30"
            },
            {
              "end": "2011-06-30",
              "val": 8535000000,
              "accn": "0001104659-11-049441",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2011-08-30",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 8461000000,
              "accn": "0001104659-11-060593",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-03",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-12-31",
              "val": 8429000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 8429000000,
              "accn": "0001104659-12-073242",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-01"
            },
            {
              "end": "2011-12-31",
              "val": 8429000000,
              "accn": "0001104659-12-053745",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02"
            },
            {
              "end": "2011-12-31",
              "val": 8429000000,
              "accn": "0001104659-12-032634",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-03"
            },
            {
              "end": "2011-12-31",
              "val": 8429000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "end": "2012-03-31",
              "val": 8624000000,
              "accn": "0001104659-12-032634",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-03",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": 8710000000,
              "accn": "0001104659-12-053745",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 8823000000,
              "accn": "0001104659-12-073242",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-01",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 9159000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "end": "2012-12-31",
              "val": 9159000000,
              "accn": "0000922621-13-000018",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-08-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 9159000000,
              "accn": "0000922621-13-000009",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29"
            },
            {
              "end": "2013-03-31",
              "val": 9304000000,
              "accn": "0000922621-13-000009",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2013-06-30",
              "val": 9180000000,
              "accn": "0000922621-13-000018",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-08-01",
              "frame": "CY2013Q2I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesGrossUnrealizedLosses1": {
        "label": "Available-for-sale Securities, Gross Unrealized Losses (Deprecated 2013-01-31)",
        "description": "This item represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.",
        "units": {
          "USD": [
            {
              "end": "2010-12-31",
              "val": 39000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 39000000,
              "accn": "0001104659-11-060593",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-03"
            },
            {
              "end": "2010-12-31",
              "val": 39000000,
              "accn": "0001104659-11-049441",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2011-08-30"
            },
            {
              "end": "2011-06-30",
              "val": 16000000,
              "accn": "0001104659-11-049441",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2011-08-30",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 55000000,
              "accn": "0001104659-11-060593",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-03",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-12-31",
              "val": 50000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 50000000,
              "accn": "0001104659-12-073242",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-01"
            },
            {
              "end": "2011-12-31",
              "val": 50000000,
              "accn": "0001104659-12-053745",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02"
            },
            {
              "end": "2011-12-31",
              "val": 50000000,
              "accn": "0001104659-12-032634",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-03"
            },
            {
              "end": "2011-12-31",
              "val": 50000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "end": "2012-03-31",
              "val": 16000000,
              "accn": "0001104659-12-032634",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-03",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": 20000000,
              "accn": "0001104659-12-053745",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 7000000,
              "accn": "0001104659-12-073242",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-01",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 9000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "end": "2012-12-31",
              "val": 9000000,
              "accn": "0000922621-13-000018",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-08-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 9000000,
              "accn": "0000922621-13-000009",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29"
            },
            {
              "end": "2013-03-31",
              "val": 14000000,
              "accn": "0000922621-13-000009",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2013-06-30",
              "val": 99000000,
              "accn": "0000922621-13-000018",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-08-01",
              "frame": "CY2013Q2I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesNoncurrent": {
        "label": "Available-for-sale Securities, Noncurrent",
        "description": "Investments in debt and equity securities which are categorized neither as held-to-maturity nor trading and which are intended to be sold or mature more than one year from the balance sheet date or operating cycle, if longer. Such securities are reported at fair value; unrealized gains (losses) related to Available-for-sale Securities are excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain (loss) of an Available-for-sale security that is designated as being hedged in a fair value hedge is recognized in earnings during the period of the hedge, as are other than temporary declines in fair value below the cost basis for investments in equity securities and debt securities that an entity intends to sell or it is more likely than not that it will be required to sell before the recovery of its amortized cost basis. Other than temporary declines in fair value below the cost basis for debt securities categorized as Available-for-sale that an entity does not intend to sell and for which it is not more likely than not that the entity will be required to sell before the recovery of its amortized cost basis are bifurcated into credit losses and losses related to all other factors. Other than temporary declines in fair value below cost basis related to credit losses are recognized in earnings, and losses related to all other factors are recognized in other comprehensive income.",
        "units": {
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            {
              "end": "2014-12-31",
              "val": 526492000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 537874000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25"
            },
            {
              "end": "2015-12-31",
              "val": 537874000,
              "accn": "0000922621-16-000077",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-04-28"
            },
            {
              "end": "2015-12-31",
              "val": 537874000,
              "accn": "0000922621-16-000102",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-28"
            },
            {
              "end": "2015-12-31",
              "val": 537874000,
              "accn": "0000922621-16-000113",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-27"
            },
            {
              "end": "2015-12-31",
              "val": 537874000,
              "accn": "0000922621-17-000008",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-23",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-03-31",
              "val": 560928000,
              "accn": "0000922621-16-000077",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-04-28",
              "frame": "CY2016Q1I"
            },
            {
              "end": "2016-06-30",
              "val": 607548000,
              "accn": "0000922621-16-000102",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-28",
              "frame": "CY2016Q2I"
            },
            {
              "end": "2016-09-30",
              "val": 652267000,
              "accn": "0000922621-16-000113",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-27",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2016-12-31",
              "val": 657153000,
              "accn": "0000922621-17-000008",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-23"
            },
            {
              "end": "2016-12-31",
              "val": 657153000,
              "accn": "0000922621-17-000020",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-01"
            },
            {
              "end": "2016-12-31",
              "val": 657153000,
              "accn": "0000922621-17-000033",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-07-27"
            },
            {
              "end": "2016-12-31",
              "val": 657153000,
              "accn": "0000922621-17-000043",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-10-26"
            },
            {
              "end": "2016-12-31",
              "val": 657153000,
              "accn": "0000922621-18-000016",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-22",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-03-31",
              "val": 642457000,
              "accn": "0000922621-17-000020",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-01",
              "frame": "CY2017Q1I"
            },
            {
              "end": "2017-06-30",
              "val": 672625000,
              "accn": "0000922621-17-000033",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-07-27",
              "frame": "CY2017Q2I"
            },
            {
              "end": "2017-09-30",
              "val": 683948000,
              "accn": "0000922621-17-000043",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-10-26",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2017-12-31",
              "val": 687523000,
              "accn": "0000922621-18-000016",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-22"
            },
            {
              "end": "2017-12-31",
              "val": 687523000,
              "accn": "0000922621-18-000025",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-26"
            },
            {
              "end": "2017-12-31",
              "val": 687523000,
              "accn": "0000922621-18-000033",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-07-26"
            },
            {
              "end": "2017-12-31",
              "val": 687523000,
              "accn": "0000922621-18-000046",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-25"
            },
            {
              "end": "2017-12-31",
              "val": 687523000,
              "accn": "0000922621-19-000008",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-21",
              "frame": "CY2017Q4I"
            }
          ]
        }
      },
      "AvailableforsaleSecuritiesGrossUnrealizedGain": {
        "label": "Available-for-sale Securities, Gross Unrealized Gains (Deprecated 2013-01-31)",
        "description": "This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.",
        "units": {
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              "end": "2010-12-31",
              "val": 533000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2010-12-31",
              "val": 533000000,
              "accn": "0001104659-11-060593",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-03"
            },
            {
              "end": "2010-12-31",
              "val": 533000000,
              "accn": "0001104659-11-049441",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2011-08-30"
            },
            {
              "end": "2011-06-30",
              "val": 549000000,
              "accn": "0001104659-11-049441",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2011-08-30",
              "frame": "CY2011Q2I"
            },
            {
              "end": "2011-09-30",
              "val": 552000000,
              "accn": "0001104659-11-060593",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-03",
              "frame": "CY2011Q3I"
            },
            {
              "end": "2011-12-31",
              "val": 560000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2011-12-31",
              "val": 560000000,
              "accn": "0001104659-12-073242",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-01"
            },
            {
              "end": "2011-12-31",
              "val": 560000000,
              "accn": "0001104659-12-053745",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02"
            },
            {
              "end": "2011-12-31",
              "val": 560000000,
              "accn": "0001104659-12-032634",
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              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-03"
            },
            {
              "end": "2011-12-31",
              "val": 560000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "end": "2012-03-31",
              "val": 637000000,
              "accn": "0001104659-12-032634",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-03",
              "frame": "CY2012Q1I"
            },
            {
              "end": "2012-06-30",
              "val": 670000000,
              "accn": "0001104659-12-053745",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 820000000,
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              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-01",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
              "val": 790000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "end": "2012-12-31",
              "val": 790000000,
              "accn": "0000922621-13-000018",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-08-01",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2012-12-31",
              "val": 790000000,
              "accn": "0000922621-13-000009",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29"
            },
            {
              "end": "2013-03-31",
              "val": 766000000,
              "accn": "0000922621-13-000009",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29",
              "frame": "CY2013Q1I"
            },
            {
              "end": "2013-06-30",
              "val": 528000000,
              "accn": "0000922621-13-000018",
              "fy": 2013,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2013-08-01",
              "frame": "CY2013Q2I"
            }
          ]
        }
      },
      "AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1": {
        "label": "Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions",
        "description": "Number of investment positions in available-for-sale investments in a continuous unrealized loss position for which an other-than-temporary impairment (OTTI) has not been recognized in the income statement.",
        "units": {
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              "val": 295,
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              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 407,
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              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25"
            },
            {
              "end": "2015-12-31",
              "val": 407,
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              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-04-28"
            },
            {
              "end": "2015-12-31",
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              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-28"
            },
            {
              "end": "2015-12-31",
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              "accn": "0000922621-16-000113",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-27"
            },
            {
              "end": "2015-12-31",
              "val": 407,
              "accn": "0000922621-17-000008",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-23",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-03-31",
              "val": 305,
              "accn": "0000922621-16-000077",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-04-28",
              "frame": "CY2016Q1I"
            },
            {
              "end": "2016-06-30",
              "val": 303,
              "accn": "0000922621-16-000102",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-28",
              "frame": "CY2016Q2I"
            },
            {
              "end": "2016-09-30",
              "val": 205,
              "accn": "0000922621-16-000113",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-27",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2016-12-31",
              "val": 253,
              "accn": "0000922621-17-000008",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-23"
            },
            {
              "end": "2016-12-31",
              "val": 253,
              "accn": "0000922621-17-000020",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-01"
            },
            {
              "end": "2016-12-31",
              "val": 253,
              "accn": "0000922621-17-000033",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-07-27"
            },
            {
              "end": "2016-12-31",
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              "accn": "0000922621-17-000043",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-10-26"
            },
            {
              "end": "2016-12-31",
              "val": 253,
              "accn": "0000922621-18-000016",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-22",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-03-31",
              "val": 232,
              "accn": "0000922621-17-000020",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-01",
              "frame": "CY2017Q1I"
            },
            {
              "end": "2017-06-30",
              "val": 286,
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              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-07-27",
              "frame": "CY2017Q2I"
            },
            {
              "end": "2017-09-30",
              "val": 324,
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              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-10-26",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2017-12-31",
              "val": 417,
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              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-22"
            },
            {
              "end": "2017-12-31",
              "val": 417,
              "accn": "0000922621-18-000025",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-26"
            },
            {
              "end": "2017-12-31",
              "val": 417,
              "accn": "0000922621-18-000033",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-07-26"
            },
            {
              "end": "2017-12-31",
              "val": 417,
              "accn": "0000922621-18-000046",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-25"
            },
            {
              "end": "2017-12-31",
              "val": 417,
              "accn": "0000922621-19-000008",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-21",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-03-31",
              "val": 558,
              "accn": "0000922621-18-000025",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-26",
              "frame": "CY2018Q1I"
            }
          ]
        }
      },
      "BenefitsLossesAndExpenses": {
        "label": "Benefits, Losses and Expenses",
        "description": "The total amount of expense recognized during the period for future policy benefits, claims and claims adjustment costs, and for selling, general and administrative costs.",
        "units": {
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              "end": "2008-12-31",
              "val": 3490000000,
              "accn": "0000950123-11-017950",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-24",
              "frame": "CY2008"
            },
            {
              "start": "2009-01-01",
              "end": "2009-06-30",
              "val": 1926000000,
              "accn": "0000950123-10-078550",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-17"
            },
            {
              "start": "2009-04-01",
              "end": "2009-06-30",
              "val": 891000000,
              "accn": "0000950123-10-078550",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-17",
              "frame": "CY2009Q2"
            },
            {
              "start": "2009-01-01",
              "end": "2009-09-30",
              "val": 2856000000,
              "accn": "0000950123-10-100942",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-11-04"
            },
            {
              "start": "2009-07-01",
              "end": "2009-09-30",
              "val": 930000000,
              "accn": "0000950123-10-100942",
              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-11-04",
              "frame": "CY2009Q3"
            },
            {
              "start": "2008-12-31",
              "end": "2009-12-31",
              "val": 3731000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2009"
            },
            {
              "start": "2009-01-01",
              "end": "2009-12-31",
              "val": 3731000000,
              "accn": "0000950123-11-017950",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-24"
            },
            {
              "start": "2009-12-30",
              "end": "2010-03-31",
              "val": 988000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2010Q1"
            },
            {
              "start": "2010-01-01",
              "end": "2010-03-31",
              "val": 988000000,
              "accn": "0001104659-11-026329",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-05-05"
            },
            {
              "start": "2010-01-01",
              "end": "2010-06-30",
              "val": 1955000000,
              "accn": "0000950123-10-078550",
              "fy": 2010,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2010-08-17"
            },
            {
              "start": "2010-01-01",
              "end": "2010-06-30",
              "val": 1955000000,
              "accn": "0001104659-11-049441",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2011-08-30"
            },
            {
              "start": "2010-03-31",
              "end": "2010-06-30",
              "val": 967000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2010Q2"
            },
            {
              "start": "2010-04-01",
              "end": "2010-06-30",
              "val": 967000000,
              "accn": "0000950123-10-078550",
              "fy": 2010,
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              "val": -1042000,
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              "filed": "2021-02-25",
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              "fy": 2020,
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              "filed": "2021-02-25"
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              "filed": "2022-02-24",
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              "accn": "0000922621-22-000013",
              "fy": 2021,
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              "form": "10-K",
              "filed": "2022-02-24"
            },
            {
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              "val": 86966000,
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              "fy": 2022,
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              "form": "10-K",
              "filed": "2023-03-01",
              "frame": "CY2021"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": -304005000,
              "accn": "0000922621-23-000007",
              "fy": 2022,
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              "filed": "2023-03-01"
            },
            {
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            {
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            {
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              "form": "10-K",
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            {
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              "form": "10-K",
              "filed": "2025-02-27"
            },
            {
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              "val": 8034000,
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              "form": "10-K",
              "filed": "2026-02-23",
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              "form": "10-K",
              "filed": "2026-02-23",
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              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
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              "val": 87000000,
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              "filed": "2014-02-27"
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              "filed": "2015-02-26"
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              "filed": "2016-02-25",
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              "val": 60774000,
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              "filed": "2016-02-25"
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              "val": 60774000,
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              "fy": 2016,
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              "form": "10-K",
              "filed": "2017-02-23",
              "frame": "CY2015"
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              "val": -43032000,
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            {
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              "val": -82940000,
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              "fy": 2017,
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              "filed": "2018-02-22"
            },
            {
              "start": "2017-01-01",
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              "val": -82940000,
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              "fy": 2018,
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              "form": "10-K",
              "filed": "2019-02-21",
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            {
              "start": "2018-01-01",
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              "val": 123910000,
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              "fy": 2018,
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              "filed": "2019-02-21"
            },
            {
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              "fy": 2019,
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              "filed": "2020-02-27"
            },
            {
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            },
            {
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            {
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              "filed": "2022-02-24"
            },
            {
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              "form": "10-K",
              "filed": "2023-03-01",
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            {
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              "val": 448330000,
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              "fy": 2022,
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            {
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              "filed": "2024-02-26",
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            {
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              "filed": "2024-02-26"
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            {
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              "val": 28250000,
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              "form": "10-K",
              "filed": "2025-02-27"
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            {
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              "val": 28250000,
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              "form": "10-K",
              "filed": "2026-02-23",
              "frame": "CY2024"
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            {
              "start": "2025-01-01",
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              "val": -36300000,
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              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-23",
              "frame": "CY2025"
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          ]
        }
      },
      "DefinedBenefitPlanActuarialNetGainsLosses": {
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            {
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              "end": "2010-12-31",
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              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2010"
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            {
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            {
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              "form": "10-Q/A",
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            {
              "start": "2010-04-01",
              "end": "2010-06-30",
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            {
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              "val": -1000000,
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-03",
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            {
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              "filed": "2013-02-26",
              "frame": "CY2010"
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            {
              "start": "2011-01-01",
              "end": "2011-03-31",
              "val": -2000000,
              "accn": "0001104659-12-032634",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-03",
              "frame": "CY2011Q1"
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            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": -3000000,
              "accn": "0001104659-11-049441",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2011-08-30"
            },
            {
              "start": "2011-01-01",
              "end": "2011-06-30",
              "val": -3000000,
              "accn": "0001104659-12-053745",
              "fy": 2012,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02"
            },
            {
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              "form": "10-Q/A",
              "filed": "2011-08-30"
            },
            {
              "start": "2011-04-01",
              "end": "2011-06-30",
              "val": -1000000,
              "accn": "0001104659-12-053745",
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              "fp": "Q2",
              "form": "10-Q",
              "filed": "2012-08-02",
              "frame": "CY2011Q2"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": -4000000,
              "accn": "0001104659-11-060593",
              "fy": 2011,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2011-11-03"
            },
            {
              "start": "2011-01-01",
              "end": "2011-09-30",
              "val": -4000000,
              "accn": "0001104659-12-073242",
              "fy": 2012,
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              "form": "10-Q",
              "filed": "2012-11-01"
            },
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              "end": "2024-12-31",
              "val": 37061000,
              "accn": "0000922621-25-000004",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": 37061000,
              "accn": "0001628280-26-010666",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-23",
              "frame": "CY2024"
            },
            {
              "start": "2025-01-01",
              "end": "2025-12-31",
              "val": 42331000,
              "accn": "0001628280-26-010666",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-23",
              "frame": "CY2025"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedAmortizationOfGainLossNextFiscalYear": {
        "label": "Defined Benefit Plan, Expected Amortization of Gain (Loss), Next Fiscal Year",
        "description": "Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position.",
        "units": {
          "USD": [
            {
              "end": "2017-12-31",
              "val": -12800000,
              "accn": "0000922621-18-000016",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-22",
              "frame": "CY2017Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedAmortizationOfPriorServiceCostCreditNextFiscalYear": {
        "label": "Defined Benefit Plan, Expected Amortization of Prior Service Cost (Credit), Next Fiscal Year",
        "description": "Amount included in accumulated other comprehensive (income) loss for prior service cost (credit) expected to be recognized in net periodic benefit cost (credit) for fiscal year following most recent annual statement of financial position.",
        "units": {
          "USD": [
            {
              "end": "2017-12-31",
              "val": 1100000,
              "accn": "0000922621-18-000016",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-22",
              "frame": "CY2017Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years",
        "description": "Amount of benefit for defined benefit plan expected to be paid in five fiscal years after fifth fiscal year following current fiscal year.",
        "units": {
          "USD": [
            {
              "end": "2012-12-31",
              "val": 123000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 139000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-27",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 150000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 163388000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 181837000,
              "accn": "0000922621-17-000008",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-23",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 210951000,
              "accn": "0000922621-18-000016",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-22",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 213490000,
              "accn": "0000922621-19-000008",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-21",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 229518000,
              "accn": "0000922621-20-000009",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-27",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 248536000,
              "accn": "0000922621-21-000010",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-25",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-12-31",
              "val": 265680000,
              "accn": "0000922621-22-000013",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-24",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-12-31",
              "val": 276456000,
              "accn": "0000922621-23-000007",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-03-01",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 294614000,
              "accn": "0000922621-24-000006",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-26",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 324250000,
              "accn": "0000922621-25-000004",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 346104000,
              "accn": "0001628280-26-010666",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-23",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInFiveFiscalYearsThereafter": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter (Deprecated 2012-01-31)",
        "description": "The amount of the aggregate benefits expected to be paid in the five fiscal years thereafter (the aggregate amount of benefits expected to be paid in years 6 through 10 after the date of the latest statement of financial position).",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 110000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearFive": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payments in Year Five (Deprecated 2012-01-31)",
        "description": "The amount of the benefits expected to be paid in Year 5.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 15000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearFour": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payments in Year Four (Deprecated 2012-01-31)",
        "description": "The amount of the benefits expected to be paid in Year 4.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 13000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "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": "2011-12-31",
              "val": 9000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearThree": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payments in Year Three (Deprecated 2012-01-31)",
        "description": "The amount of the benefits expected to be paid in Year 3.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 11000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsInYearTwo": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payments in Year Two (Deprecated 2012-01-31)",
        "description": "The amount of the benefits expected to be paid in Year 2.",
        "units": {
          "USD": [
            {
              "end": "2011-12-31",
              "val": 10000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2011Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payment, Year One",
        "description": "Amount of benefit for defined benefit plan expected to be paid in next fiscal year following current fiscal year.",
        "units": {
          "USD": [
            {
              "end": "2012-12-31",
              "val": 12000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 12000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-27",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 13000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 14781000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 18943000,
              "accn": "0000922621-17-000008",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-23",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 20739000,
              "accn": "0000922621-18-000016",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-22",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 22039000,
              "accn": "0000922621-19-000008",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-21",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 23788000,
              "accn": "0000922621-20-000009",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-27",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 25940000,
              "accn": "0000922621-21-000010",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-25",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-12-31",
              "val": 29730000,
              "accn": "0000922621-22-000013",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-24",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-12-31",
              "val": 33827000,
              "accn": "0000922621-23-000007",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-03-01",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 39778000,
              "accn": "0000922621-24-000006",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-26",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 43777000,
              "accn": "0000922621-25-000004",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 44346000,
              "accn": "0001628280-26-010666",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-23",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payment, Year Five",
        "description": "Amount of benefit for defined benefit plan expected to be paid in fifth fiscal year following current fiscal year.",
        "units": {
          "USD": [
            {
              "end": "2012-12-31",
              "val": 17000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 20000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-27",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 21000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 23223000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 26246000,
              "accn": "0000922621-17-000008",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-23",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 31650000,
              "accn": "0000922621-18-000016",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-22",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 32631000,
              "accn": "0000922621-19-000008",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-21",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 35722000,
              "accn": "0000922621-20-000009",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-27",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 40136000,
              "accn": "0000922621-21-000010",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-25",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-12-31",
              "val": 42218000,
              "accn": "0000922621-22-000013",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-24",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-12-31",
              "val": 44904000,
              "accn": "0000922621-23-000007",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-03-01",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 48800000,
              "accn": "0000922621-24-000006",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-26",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 54430000,
              "accn": "0000922621-25-000004",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
              "val": 59093000,
              "accn": "0001628280-26-010666",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-23",
              "frame": "CY2025Q4I"
            }
          ]
        }
      },
      "DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour": {
        "label": "Defined Benefit Plan, Expected Future Benefit Payment, Year Four",
        "description": "Amount of benefit for defined benefit plan expected to be paid in fourth fiscal year following current fiscal year.",
        "units": {
          "USD": [
            {
              "end": "2012-12-31",
              "val": 15000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012Q4I"
            },
            {
              "end": "2013-12-31",
              "val": 17000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-27",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 19000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 20669000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 23369000,
              "accn": "0000922621-17-000008",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-23",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 28687000,
              "accn": "0000922621-18-000016",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-22",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 29319000,
              "accn": "0000922621-19-000008",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-21",
              "frame": "CY2018Q4I"
            },
            {
              "end": "2019-12-31",
              "val": 32497000,
              "accn": "0000922621-20-000009",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-27",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
              "val": 36643000,
              "accn": "0000922621-21-000010",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-25",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-12-31",
              "val": 39813000,
              "accn": "0000922621-22-000013",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-24",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-12-31",
              "val": 41731000,
              "accn": "0000922621-23-000007",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-03-01",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 45087000,
              "accn": "0000922621-24-000006",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-26",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 50853000,
              "accn": "0000922621-25-000004",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2024Q4I"
            },
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            },
            {
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      },
      "FinancingReceivableAllowanceForCreditLosses": {
        "label": "Financing Receivable, Allowance for Credit Loss",
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            {
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            {
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              "form": "10-Q",
              "filed": "2021-10-28"
            },
            {
              "end": "2020-12-31",
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              "accn": "0000922621-22-000013",
              "fy": 2021,
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              "form": "10-K",
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              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-03-31",
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            {
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              "fy": 2021,
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              "form": "10-Q",
              "filed": "2021-07-29",
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              "filed": "2022-02-24"
            },
            {
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            {
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            {
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              "form": "10-Q",
              "filed": "2022-10-27"
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            {
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              "frame": "CY2021Q4I"
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            {
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            {
              "end": "2022-06-30",
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            },
            {
              "end": "2022-09-30",
              "val": 1000000,
              "accn": "0000922621-22-000038",
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              "fp": "Q3",
              "form": "10-Q",
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              "frame": "CY2022Q3I"
            },
            {
              "end": "2022-12-31",
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              "accn": "0000922621-23-000007",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-03-01"
            },
            {
              "end": "2022-12-31",
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              "fy": 2023,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2023-04-27"
            },
            {
              "end": "2022-12-31",
              "val": 1000000,
              "accn": "0000922621-23-000017",
              "fy": 2023,
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              "form": "10-Q",
              "filed": "2023-07-27"
            },
            {
              "end": "2022-12-31",
              "val": 1000000,
              "accn": "0000922621-23-000022",
              "fy": 2023,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2023-10-26",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-03-31",
              "val": 1000000,
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              "fy": 2023,
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              "form": "10-Q",
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            {
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              "end": "2023-09-30",
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              "frame": "CY2023Q3I"
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          ]
        }
      },
      "FiniteLivedIntangibleAssetsAccumulatedAmortization": {
        "label": "Finite-Lived Intangible Assets, Accumulated Amortization",
        "description": "Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.",
        "units": {
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              "val": 17804000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2013Q4I"
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            {
              "end": "2014-12-31",
              "val": 25210000,
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              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 34210000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2015Q4I"
            }
          ]
        }
      },
      "FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths": {
        "label": "Finite-Lived Intangible Asset, Expected Amortization, Year One",
        "description": "Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
          "USD": [
            {
              "end": "2015-12-31",
              "val": 9314000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2015Q4I"
            }
          ]
        }
      },
      "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": "2015-12-31",
              "val": 2405000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2015Q4I"
            }
          ]
        }
      },
      "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": "2015-12-31",
              "val": 3467000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2015Q4I"
            }
          ]
        }
      },
      "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": "2015-12-31",
              "val": 4906000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2015Q4I"
            }
          ]
        }
      },
      "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": "2015-12-31",
              "val": 8674000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2015Q4I"
            }
          ]
        }
      },
      "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": {
          "USD": [
            {
              "end": "2013-12-31",
              "val": 58408000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 67820000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 81007000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2015Q4I"
            }
          ]
        }
      },
      "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": "2013-12-31",
              "val": 40604000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2013Q4I"
            },
            {
              "end": "2014-12-31",
              "val": 42610000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-12-31",
              "val": 46797000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2015Q4I"
            }
          ]
        }
      },
      "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": "2016-01-01",
              "end": "2016-12-31",
              "val": -59000,
              "accn": "0000922621-19-000008",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-21",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": -98000,
              "accn": "0000922621-19-000008",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-21"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": -98000,
              "accn": "0000922621-20-000009",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-27",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 3047000,
              "accn": "0000922621-19-000008",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-21"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 3047000,
              "accn": "0000922621-20-000009",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-27"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 3047000,
              "accn": "0000922621-21-000010",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-25",
              "frame": "CY2018"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": -75000,
              "accn": "0000922621-20-000009",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-27"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": -75000,
              "accn": "0000922621-21-000010",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-25"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": -75000,
              "accn": "0000922621-22-000013",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-24",
              "frame": "CY2019"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 15000,
              "accn": "0000922621-21-000010",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-25"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 15000,
              "accn": "0000922621-22-000013",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-24"
            },
            {
              "start": "2020-01-01",
              "end": "2020-12-31",
              "val": 15000,
              "accn": "0000922621-23-000007",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-03-01",
              "frame": "CY2020"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 13000,
              "accn": "0000922621-22-000013",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-24"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 13000,
              "accn": "0000922621-23-000007",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-03-01"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": 13000,
              "accn": "0000922621-24-000006",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-26",
              "frame": "CY2021"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": -172000,
              "accn": "0000922621-23-000007",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-03-01"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": -172000,
              "accn": "0000922621-24-000006",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-26"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": -172000,
              "accn": "0000922621-25-000004",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2022"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": -1607000,
              "accn": "0000922621-24-000006",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-26"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": -1607000,
              "accn": "0000922621-25-000004",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2023"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": -3874000,
              "accn": "0000922621-25-000004",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2024"
            }
          ]
        }
      },
      "GainLossOnInvestmentsExcludingOtherThanTemporaryImpairments": {
        "label": "Gain (Loss) on Investments, Excluding Other than Temporary Impairments",
        "description": "This item represents the net total realized and unrealized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain (loss) of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain (loss) which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting.",
        "units": {
          "USD": [
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 672000,
              "accn": "0000922621-19-000008",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-21",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-03-31",
              "val": 516000,
              "accn": "0000922621-18-000025",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-26",
              "frame": "CY2017Q1"
            },
            {
              "start": "2017-01-01",
              "end": "2017-06-30",
              "val": 640000,
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              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-07-26"
            },
            {
              "start": "2017-04-01",
              "end": "2017-06-30",
              "val": 124000,
              "accn": "0000922621-18-000033",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-07-26",
              "frame": "CY2017Q2"
            },
            {
              "start": "2017-01-01",
              "end": "2017-09-30",
              "val": 1539000,
              "accn": "0000922621-18-000046",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-25"
            },
            {
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              "end": "2017-09-30",
              "val": 899000,
              "accn": "0000922621-18-000046",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
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              "frame": "CY2017Q3"
            },
            {
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              "end": "2017-12-31",
              "val": 1334000,
              "accn": "0000922621-19-000008",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-21",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-03-31",
              "val": -465000,
              "accn": "0000922621-18-000025",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-26"
            },
            {
              "start": "2018-01-01",
              "end": "2018-03-31",
              "val": -465000,
              "accn": "0000922621-19-000014",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-02",
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            },
            {
              "start": "2018-01-01",
              "end": "2018-06-30",
              "val": -497000,
              "accn": "0000922621-18-000033",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
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            },
            {
              "start": "2018-01-01",
              "end": "2018-06-30",
              "val": -497000,
              "accn": "0000922621-19-000023",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-25"
            },
            {
              "start": "2018-04-01",
              "end": "2018-06-30",
              "val": -32000,
              "accn": "0000922621-18-000033",
              "fy": 2018,
              "fp": "Q2",
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              "filed": "2018-07-26"
            },
            {
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              "end": "2018-06-30",
              "val": -32000,
              "accn": "0000922621-19-000023",
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              "form": "10-Q",
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              "frame": "CY2018Q2"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": -497000,
              "accn": "0000922621-18-000046",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-25"
            },
            {
              "start": "2018-01-01",
              "end": "2018-09-30",
              "val": -497000,
              "accn": "0000922621-19-000038",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24"
            },
            {
              "start": "2018-07-01",
              "end": "2018-09-30",
              "val": 0,
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              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-25"
            },
            {
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              "end": "2018-09-30",
              "val": 0,
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              "frame": "CY2018Q3"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": -2010000,
              "accn": "0000922621-19-000008",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-21",
              "frame": "CY2018"
            },
            {
              "start": "2019-01-01",
              "end": "2019-03-31",
              "val": 2503000,
              "accn": "0000922621-19-000014",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-02",
              "frame": "CY2019Q1"
            },
            {
              "start": "2019-01-01",
              "end": "2019-06-30",
              "val": 3805000,
              "accn": "0000922621-19-000023",
              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-07-25"
            },
            {
              "start": "2019-04-01",
              "end": "2019-06-30",
              "val": 1302000,
              "accn": "0000922621-19-000023",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-25",
              "frame": "CY2019Q2"
            },
            {
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              "end": "2019-09-30",
              "val": 5501000,
              "accn": "0000922621-19-000038",
              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-10-24"
            },
            {
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              "val": 1696000,
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              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-10-24",
              "frame": "CY2019Q3"
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          ]
        }
      },
      "GainLossOnSaleOfOtherInvestments": {
        "label": "Gain (Loss) on Sale of Other Investments",
        "description": "Amount of gain (loss) included in earnings for investments classified as other.",
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            },
            {
              "start": "2020-04-01",
              "end": "2020-06-30",
              "val": 1000,
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              "fy": 2021,
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              "form": "10-Q",
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              "frame": "CY2020Q2"
            },
            {
              "start": "2020-01-01",
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              "val": 1000,
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              "val": 0,
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            {
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              "val": 1000,
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            {
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              "form": "10-Q",
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              "frame": "CY2021Q2"
            },
            {
              "start": "2021-01-01",
              "end": "2021-09-30",
              "val": 1000,
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              "filed": "2021-10-28"
            },
            {
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              "end": "2021-09-30",
              "val": 1000,
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              "filed": "2022-10-27"
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            {
              "start": "2021-07-01",
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              "val": 0,
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            {
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            {
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              "val": 2000,
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              "fy": 2022,
              "fp": "Q1",
              "form": "10-Q",
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            {
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            {
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            },
            {
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            {
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        }
      },
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        "label": "Gain (Loss) on Sale of Properties",
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              "filed": "2019-02-21"
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              "val": 3400000,
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              "filed": "2020-02-27"
            },
            {
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              "end": "2018-12-31",
              "val": 3400000,
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              "filed": "2020-02-27",
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      },
      "GoodwillImpairmentLoss": {
        "label": "Goodwill, Impairment Loss",
        "description": "Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.",
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              "filed": "2012-02-27"
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            {
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        "label": "Other than Temporary Impairment Losses, Investments",
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              "val": 571000000,
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              "frame": "CY2008"
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            {
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              "val": 83000000,
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              "filed": "2010-08-17"
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            {
              "start": "2009-04-01",
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              "val": 12000000,
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            {
              "start": "2009-01-01",
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              "val": 16000000,
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              "filed": "2010-11-04",
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            {
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              "frame": "CY2009"
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            {
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              "val": 126000000,
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              "filed": "2011-02-24"
            },
            {
              "start": "2010-01-01",
              "end": "2010-03-31",
              "val": 2000000,
              "accn": "0001104659-11-026329",
              "fy": 2011,
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              "form": "10-Q",
              "filed": "2011-05-05",
              "frame": "CY2010Q1"
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            {
              "start": "2010-01-01",
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              "val": 6000000,
              "accn": "0001104659-11-049441",
              "fy": 2011,
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            {
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            },
            {
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            {
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              "filed": "2012-05-03",
              "frame": "CY2011Q1"
            },
            {
              "start": "2011-01-01",
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              "val": 0,
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              "fy": 2011,
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              "filed": "2011-05-05"
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            {
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            },
            {
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              "fy": 2011,
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              "filed": "2011-08-30"
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            {
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              "val": 0,
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              "fy": 2012,
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              "form": "10-Q",
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            },
            {
              "start": "2011-04-01",
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              "accn": "0001104659-11-049441",
              "fy": 2011,
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              "filed": "2011-08-30"
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            {
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              "accn": "0001104659-11-060593",
              "fy": 2011,
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              "filed": "2011-11-03"
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            {
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            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": -1463000,
              "accn": "0000922621-25-000004",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27",
              "frame": "CY2022"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 6143000,
              "accn": "0000922621-24-000006",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-26"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 6143000,
              "accn": "0000922621-25-000004",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27"
            },
            {
              "start": "2023-01-01",
              "end": "2023-12-31",
              "val": 6143000,
              "accn": "0001628280-26-010666",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-23",
              "frame": "CY2023"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": 2677000,
              "accn": "0000922621-25-000004",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-27"
            },
            {
              "start": "2024-01-01",
              "end": "2024-12-31",
              "val": 2677000,
              "accn": "0001628280-26-010666",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-23",
              "frame": "CY2024"
            },
            {
              "start": "2025-01-01",
              "end": "2025-12-31",
              "val": -3119000,
              "accn": "0001628280-26-010666",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-23",
              "frame": "CY2025"
            }
          ]
        }
      },
      "IncreaseDecreaseInDeferredPolicyAcquisitionCosts": {
        "label": "Increase (Decrease) in Deferred Policy Acquisition Costs",
        "description": "The increase (decrease) during the reporting period in the balance sheet value of capitalized sales costs that are associated with acquiring a new insurance customers.",
        "units": {
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            {
              "start": "2008-12-31",
              "end": "2009-12-31",
              "val": 642000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2009"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 667000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 667000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2010"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 701000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 701000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 701000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-27"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 743000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 743000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-27"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 743000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 816000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-27"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 816000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 892000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014"
            }
          ]
        }
      },
      "IncreaseDecreaseInDueFromRelatedPartiesCurrent": {
        "label": "Increase (Decrease) in Due from Related Parties, Current",
        "description": "The aggregate increase (decrease) during the reporting period in the amount due from the following types of related parties: a parent company and its subsidiaries; subsidiaries of a common parent; an entity and trust for the benefit of employees, such as pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; an entity and its principal owners, management, or member of their immediate families, affiliates, or other parties with the ability to exert significant influence.",
        "units": {
          "USD": [
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": -6435000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 7472000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 7472000,
              "accn": "0000922621-17-000008",
              "fy": 2016,
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              "form": "10-K",
              "filed": "2017-02-23",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-03-31",
              "val": 412000,
              "accn": "0000922621-16-000077",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-04-28",
              "frame": "CY2015Q1"
            },
            {
              "start": "2015-01-01",
              "end": "2015-06-30",
              "val": 10415000,
              "accn": "0000922621-16-000102",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-28"
            },
            {
              "start": "2015-01-01",
              "end": "2015-09-30",
              "val": 16716000,
              "accn": "0000922621-16-000113",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-27"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": -7775000,
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              "fy": 2015,
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              "filed": "2016-02-25"
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              "filed": "2017-02-23"
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              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-22",
              "frame": "CY2015"
            },
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              "end": "2016-03-31",
              "val": 785000,
              "accn": "0000922621-16-000077",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-04-28"
            },
            {
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              "end": "2016-03-31",
              "val": 785000,
              "accn": "0000922621-17-000020",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-01",
              "frame": "CY2016Q1"
            },
            {
              "start": "2016-01-01",
              "end": "2016-06-30",
              "val": 12288000,
              "accn": "0000922621-16-000102",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-28"
            },
            {
              "start": "2016-01-01",
              "end": "2016-06-30",
              "val": 12288000,
              "accn": "0000922621-17-000033",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-07-27"
            },
            {
              "start": "2016-01-01",
              "end": "2016-09-30",
              "val": 11893000,
              "accn": "0000922621-16-000113",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-27"
            },
            {
              "start": "2016-01-01",
              "end": "2016-09-30",
              "val": 11893000,
              "accn": "0000922621-17-000043",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-10-26"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": -247000,
              "accn": "0000922621-17-000008",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-23"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": -247000,
              "accn": "0000922621-18-000016",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-22"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": -247000,
              "accn": "0000922621-19-000008",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-21",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-03-31",
              "val": 11066000,
              "accn": "0000922621-17-000020",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-05-01"
            },
            {
              "start": "2017-01-01",
              "end": "2017-03-31",
              "val": 11066000,
              "accn": "0000922621-18-000025",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-26",
              "frame": "CY2017Q1"
            },
            {
              "start": "2017-01-01",
              "end": "2017-06-30",
              "val": 5633000,
              "accn": "0000922621-17-000033",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-07-27"
            },
            {
              "start": "2017-01-01",
              "end": "2017-06-30",
              "val": 5633000,
              "accn": "0000922621-18-000033",
              "fy": 2018,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2018-07-26"
            },
            {
              "start": "2017-01-01",
              "end": "2017-09-30",
              "val": 7335000,
              "accn": "0000922621-17-000043",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-10-26"
            },
            {
              "start": "2017-01-01",
              "end": "2017-09-30",
              "val": 7335000,
              "accn": "0000922621-18-000046",
              "fy": 2018,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2018-10-25"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 4720000,
              "accn": "0000922621-18-000016",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-22"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 4720000,
              "accn": "0000922621-19-000008",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-21"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 4720000,
              "accn": "0000922621-20-000009",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-27",
              "frame": "CY2017"
            },
            {
              "start": "2018-01-01",
              "end": "2018-12-31",
              "val": 0,
              "accn": "0000922621-20-000009",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-27",
              "frame": "CY2018"
            },
            {
              "start": "2019-01-01",
              "end": "2019-12-31",
              "val": 0,
              "accn": "0000922621-20-000009",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-27",
              "frame": "CY2019"
            }
          ]
        }
      },
      "IncreaseDecreaseInFuturePolicyBenefitReserves": {
        "label": "Increase (Decrease) in Future Policy Benefit Reserves",
        "description": "The change in the future policy benefit reserve balance on the balance sheet.",
        "units": {
          "USD": [
            {
              "start": "2008-12-31",
              "end": "2009-12-31",
              "val": 37000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2009"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 21000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 21000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2010"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 28000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 28000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011"
            },
            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 28000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-27"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 31000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 31000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-27"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 31000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 34000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-27"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 34000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 24000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014"
            }
          ]
        }
      },
      "IncreaseDecreaseInIncomeTaxesReceivable": {
        "label": "Increase (Decrease) in Income Taxes Receivable",
        "description": "The increase (decrease) during the reporting period in income taxes receivable, which represents the amount due from tax authorities for refunds of overpayments or recoveries of income taxes paid.",
        "units": {
          "USD": [
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              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": -2812000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2013"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 8421000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 8421000,
              "accn": "0000922621-17-000008",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-23",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 499000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 499000,
              "accn": "0000922621-17-000008",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-23"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 499000,
              "accn": "0000922621-18-000016",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-22",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": -6687000,
              "accn": "0000922621-17-000008",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-23"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": -6687000,
              "accn": "0000922621-18-000016",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-22"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": -6687000,
              "accn": "0000922621-19-000008",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-21",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 24640000,
              "accn": "0000922621-18-000016",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-22"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 24640000,
              "accn": "0000922621-19-000008",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-21"
            },
            {
              "start": "2017-01-01",
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            },
            {
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              "filed": "2013-02-26",
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              "val": -24000000,
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            {
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              "val": -24000000,
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              "filed": "2015-02-26",
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            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 2000000,
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              "fy": 2014,
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              "filed": "2015-02-26",
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          ]
        }
      },
      "IncreaseDecreaseInPrepaidPensionCosts": {
        "label": "Increase (Decrease) in Prepaid Pension Costs (Deprecated 2017-01-31)",
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              "filed": "2016-02-25"
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            {
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              "filed": "2017-02-23",
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              "filed": "2017-02-23",
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        }
      },
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        "label": "Increase (Decrease) in Receivables",
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            {
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              "fy": 2012,
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            {
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              "fy": 2012,
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              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011"
            },
            {
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              "val": -91000000,
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            {
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              "filed": "2014-02-27"
            },
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              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014"
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          ]
        }
      },
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              "filed": "2013-02-26",
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              "form": "10-K",
              "filed": "2012-02-27"
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              "filed": "2013-02-26",
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              "val": -4000000,
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              "fy": 2013,
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              "filed": "2014-02-27"
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              "filed": "2015-02-26",
              "frame": "CY2012"
            },
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              "val": -28000000,
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              "filed": "2014-02-27"
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              "filed": "2015-02-26"
            },
            {
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              "end": "2013-12-31",
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              "filed": "2016-02-25",
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            },
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              "end": "2014-12-31",
              "val": -35000000,
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              "filed": "2015-02-26"
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              "accn": "0000922621-17-000008",
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              "filed": "2020-02-27",
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              "val": -13449000,
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            {
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              "val": -21390000,
              "accn": "0000922621-20-000009",
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            },
            {
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            {
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            {
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              "val": 625000,
              "accn": "0000922621-21-000010",
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            {
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              "accn": "0000922621-22-000013",
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            {
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            },
            {
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              "accn": "0000922621-25-000004",
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            {
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            {
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            {
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      },
      "LiabilityForFuturePolicyBenefits": {
        "label": "Liability for Future Policy Benefit, before Reinsurance",
        "description": "Amount, before effect of reinsurance, of present value of future benefit to be paid to or on behalf of policyholder and related expense less present value of future net premium receivable under insurance contract.",
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            {
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            },
            {
              "end": "2012-12-31",
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              "filed": "2013-10-31"
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            {
              "end": "2012-12-31",
              "val": 1708000000,
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            {
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              "filed": "2013-04-29",
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            },
            {
              "end": "2013-06-30",
              "val": 1739000000,
              "accn": "0000922621-13-000018",
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            {
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              "frame": "CY2013Q3I"
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            {
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              "filed": "2014-02-27"
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            {
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              "val": 1758000000,
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              "form": "10-Q",
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            {
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            {
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            {
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              "fy": 2014,
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              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013Q4I"
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            {
              "end": "2014-03-31",
              "val": 1775000000,
              "accn": "0000922621-14-000019",
              "fy": 2014,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2014-05-01",
              "frame": "CY2014Q1I"
            },
            {
              "end": "2014-06-30",
              "val": 1789000000,
              "accn": "0000922621-14-000029",
              "fy": 2014,
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              "form": "10-Q",
              "filed": "2014-07-31",
              "frame": "CY2014Q2I"
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            {
              "end": "2014-09-30",
              "val": 1801000000,
              "accn": "0000922621-14-000037",
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            {
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              "filed": "2015-02-26"
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              "val": 1812000000,
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            {
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              "val": 1812000000,
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            },
            {
              "end": "2014-12-31",
              "val": 1812000000,
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              "form": "10-Q",
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              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-03-31",
              "val": 1827000000,
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              "form": "10-Q",
              "filed": "2015-04-30",
              "frame": "CY2015Q1I"
            },
            {
              "end": "2015-06-30",
              "val": 1837000000,
              "accn": "0000922621-15-000032",
              "fy": 2015,
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              "form": "10-Q",
              "filed": "2015-07-30",
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            {
              "end": "2015-09-30",
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              "form": "10-Q",
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          ]
        }
      },
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        "label": "Liability for Future Policy Benefits, Individual and Group Annuities and Supplementary Contracts",
        "description": "Amount of accrued obligation to policyholders that relates to insured events under individual and group annuities and supplementary insurance contracts.",
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            {
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              "filed": "2012-02-27",
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        "label": "Liability for Future Policy Benefits, Other Contracts",
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            {
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            {
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            {
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              "form": "10-Q",
              "filed": "2022-04-28",
              "frame": "CY2022Q1I"
            },
            {
              "end": "2022-06-30",
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              "accn": "0000922621-22-000032",
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              "filed": "2022-07-28",
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            },
            {
              "end": "2022-09-30",
              "val": 0,
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            {
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            },
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            {
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              "form": "10-Q",
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            },
            {
              "start": "2025-04-01",
              "end": "2025-06-30",
              "val": 199173000,
              "accn": "0001628280-25-038926",
              "fy": 2025,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2025-08-07"
            },
            {
              "start": "2025-04-01",
              "end": "2025-06-30",
              "val": 199173000,
              "accn": "0001628280-26-051079",
              "fy": 2026,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2026-07-30",
              "frame": "CY2025Q2"
            },
            {
              "start": "2025-01-01",
              "end": "2025-09-30",
              "val": 559470000,
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2025-10-30"
            },
            {
              "start": "2025-07-01",
              "end": "2025-09-30",
              "val": 208921000,
              "accn": "0001628280-25-047555",
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              "fp": "Q3",
              "form": "10-Q",
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              "frame": "CY2025Q3"
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            {
              "start": "2025-01-01",
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              "form": "10-K",
              "filed": "2026-02-23",
              "frame": "CY2025"
            },
            {
              "start": "2026-01-01",
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              "accn": "0001628280-26-026866",
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              "fp": "Q1",
              "form": "10-Q",
              "filed": "2026-04-23",
              "frame": "CY2026Q1"
            },
            {
              "start": "2026-01-01",
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              "val": 370910000,
              "accn": "0001628280-26-051079",
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            {
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              "frame": "CY2026Q2"
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          ]
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        "label": "Operating Lease, Cost",
        "description": "Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.",
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              "filed": "2020-05-07",
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            {
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              "fy": 2019,
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              "filed": "2019-10-24"
            },
            {
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              "end": "2019-09-30",
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              "accn": "0000922621-20-000044",
              "fy": 2020,
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              "filed": "2019-10-24"
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              "filed": "2020-10-29",
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              "fy": 2019,
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              "filed": "2020-02-27"
            },
            {
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              "frame": "CY2019"
            },
            {
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              "end": "2020-03-31",
              "val": 3400000,
              "accn": "0000922621-20-000021",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-05-07",
              "frame": "CY2020Q1"
            },
            {
              "start": "2020-01-01",
              "end": "2020-06-30",
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              "fy": 2020,
              "fp": "Q2",
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              "filed": "2020-07-30"
            },
            {
              "start": "2020-04-01",
              "end": "2020-06-30",
              "val": 3300000,
              "accn": "0000922621-20-000030",
              "fy": 2020,
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              "form": "10-Q",
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            },
            {
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              "end": "2020-09-30",
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              "accn": "0000922621-20-000044",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-10-29"
            },
            {
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              "end": "2020-09-30",
              "val": 3200000,
              "accn": "0000922621-20-000044",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-10-29",
              "frame": "CY2020Q3"
            },
            {
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              "val": 13100000,
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              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-25",
              "frame": "CY2020"
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          ]
        }
      },
      "OperatingLeaseLiability": {
        "label": "Operating Lease, Liability",
        "description": "Present value of lessee's discounted obligation for lease payments from operating lease.",
        "units": {
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              "val": 0,
              "accn": "0000922621-19-000038",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24",
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            {
              "end": "2019-01-01",
              "val": 32100000,
              "accn": "0000922621-19-000014",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-02"
            },
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              "val": 32100000,
              "accn": "0000922621-19-000023",
              "fy": 2019,
              "fp": "Q2",
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              "filed": "2019-07-25"
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              "filed": "2019-10-24"
            },
            {
              "end": "2019-03-31",
              "val": 29055000,
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              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-02",
              "frame": "CY2019Q1I"
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              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-07-25",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
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              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-10-24",
              "frame": "CY2019Q3I"
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          ]
        }
      },
      "OperatingLeaseLiabilityCurrent": {
        "label": "Operating Lease, Liability, Current",
        "description": "Present value of lessee's discounted obligation for lease payments from operating lease, classified as current.",
        "units": {
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              "end": "2019-03-31",
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              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-05-02",
              "frame": "CY2019Q1I"
            },
            {
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              "val": 11736000,
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              "fy": 2019,
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              "form": "10-Q",
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              "form": "10-Q",
              "filed": "2019-10-24",
              "frame": "CY2019Q3I"
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        }
      },
      "OperatingLeaseLiabilityNoncurrent": {
        "label": "Operating Lease, Liability, Noncurrent",
        "description": "Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent.",
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              "form": "10-Q",
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              "fp": "Q1",
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              "filed": "2019-05-02",
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              "fy": 2019,
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              "form": "10-Q",
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              "fy": 2019,
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              "filed": "2019-10-24",
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          ]
        }
      },
      "OperatingLeaseRightOfUseAsset": {
        "label": "Operating Lease, Right-of-Use Asset",
        "description": "Amount of lessee's right to use underlying asset under operating lease.",
        "units": {
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              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-05-02"
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              "filed": "2019-07-25"
            },
            {
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              "form": "10-Q",
              "filed": "2019-05-02",
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              "filed": "2019-10-24",
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        "label": "Other Assets",
        "description": "Amount of assets classified as other.",
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              "fy": 2010,
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              "form": "10-Q",
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              "filed": "2011-02-24",
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              "form": "10-K",
              "filed": "2011-02-24"
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              "end": "2010-12-31",
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              "accn": "0001104659-11-026329",
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              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-05-05"
            },
            {
              "end": "2010-12-31",
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              "accn": "0001104659-11-049441",
              "fy": 2011,
              "fp": "Q2",
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              "filed": "2011-08-30"
            },
            {
              "end": "2010-12-31",
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              "form": "10-Q",
              "filed": "2011-11-03"
            },
            {
              "end": "2010-12-31",
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              "filed": "2012-02-27",
              "frame": "CY2010Q4I"
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            {
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              "filed": "2011-08-30",
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              "accn": "0001104659-12-013263",
              "fy": 2011,
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              "form": "10-K",
              "filed": "2012-02-27"
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              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-03"
            },
            {
              "end": "2011-12-31",
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              "form": "10-Q",
              "filed": "2012-08-02"
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            {
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              "filed": "2012-11-01"
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            {
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              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
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            {
              "end": "2012-03-31",
              "val": 406000000,
              "accn": "0001104659-12-032634",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-03",
              "frame": "CY2012Q1I"
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            {
              "end": "2012-06-30",
              "val": 510000000,
              "accn": "0001104659-12-053745",
              "fy": 2012,
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              "form": "10-Q",
              "filed": "2012-08-02",
              "frame": "CY2012Q2I"
            },
            {
              "end": "2012-09-30",
              "val": 563000000,
              "accn": "0001104659-12-073242",
              "fy": 2012,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2012-11-01",
              "frame": "CY2012Q3I"
            },
            {
              "end": "2012-12-31",
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              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
              "end": "2012-12-31",
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              "accn": "0000922621-13-000009",
              "fy": 2013,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2013-04-29"
            },
            {
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        "description": "Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan, attributable to parent.",
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              "accn": "0000922621-16-000067",
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              "accn": "0000922621-17-000008",
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            {
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            },
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            {
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              "val": 22000000,
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              "val": 22000000,
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            },
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              "val": 22000000,
              "accn": "0000922621-15-000048",
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              "filed": "2015-10-29",
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              "frame": "CY2019"
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            },
            {
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              "end": "2020-12-31",
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              "fy": 2021,
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            },
            {
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          ]
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              "filed": "2015-04-30",
              "frame": "CY2015Q1"
            },
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            {
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              "form": "10-K",
              "filed": "2017-02-23",
              "frame": "CY2015"
            },
            {
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              "val": 3146000,
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        }
      },
      "ProceedsFromSecuredLinesOfCredit": {
        "label": "Proceeds from Secured Lines of Credit",
        "description": "The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with either short term or long term maturity that is collateralized (backed by pledge, mortgage or other lien in the entity's assets).",
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        }
      },
      "ProfitLoss": {
        "label": "Net Income (Loss), Including Portion Attributable to Noncontrolling Interest",
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              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2009"
            },
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              "end": "2013-09-30",
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              "start": "2013-07-01",
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            {
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              "end": "2013-09-30",
              "val": 267000000,
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            {
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              "end": "2013-09-30",
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            {
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              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013Q3"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 1048000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-27"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 1048000000,
              "accn": "0000922621-14-000019",
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              "filed": "2014-05-01"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 1048000000,
              "accn": "0000922621-14-000029",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-31"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 1048000000,
              "accn": "0000922621-14-000037",
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-30"
            },
            {
              "start": "2013-01-01",
              "end": "2013-12-31",
              "val": 1048000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
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              "filed": "2015-02-26",
              "frame": "CY2013"
            },
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              "end": "2013-12-31",
              "val": 314000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
              "fp": "FY",
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              "filed": "2014-02-27"
            },
            {
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              "end": "2013-12-31",
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              "accn": "0000922621-15-000008",
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              "filed": "2015-02-26",
              "frame": "CY2013Q4"
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              "end": "2014-03-31",
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              "filed": "2015-02-26"
            },
            {
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              "end": "2014-03-31",
              "val": 109000000,
              "accn": "0000922621-15-000019",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-30",
              "frame": "CY2014Q1"
            },
            {
              "start": "2014-01-01",
              "end": "2014-06-30",
              "val": 212000000,
              "accn": "0000922621-14-000029",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-31"
            },
            {
              "start": "2014-01-01",
              "end": "2014-06-30",
              "val": 212000000,
              "accn": "0000922621-15-000032",
              "fy": 2015,
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              "filed": "2015-07-30"
            },
            {
              "start": "2014-04-01",
              "end": "2014-06-30",
              "val": 103000000,
              "accn": "0000922621-14-000029",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-31"
            },
            {
              "start": "2014-04-01",
              "end": "2014-06-30",
              "val": 103000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2014-04-01",
              "end": "2014-06-30",
              "val": 103000000,
              "accn": "0000922621-15-000032",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-30",
              "frame": "CY2014Q2"
            },
            {
              "start": "2014-01-01",
              "end": "2014-09-30",
              "val": 320000000,
              "accn": "0000922621-14-000037",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-30"
            },
            {
              "start": "2014-01-01",
              "end": "2014-09-30",
              "val": 320000000,
              "accn": "0000922621-15-000048",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-29"
            },
            {
              "start": "2014-07-01",
              "end": "2014-09-30",
              "val": 108000000,
              "accn": "0000922621-14-000037",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-30"
            },
            {
              "start": "2014-07-01",
              "end": "2014-09-30",
              "val": 108000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2014-07-01",
              "end": "2014-09-30",
              "val": 108000000,
              "accn": "0000922621-15-000048",
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-29",
              "frame": "CY2014Q3"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 573000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 573000000,
              "accn": "0000922621-15-000019",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-30"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 573000000,
              "accn": "0000922621-15-000032",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-30"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 573000000,
              "accn": "0000922621-15-000048",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-29",
              "frame": "CY2014"
            },
            {
              "start": "2014-10-01",
              "end": "2014-12-31",
              "val": 253000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014Q4"
            },
            {
              "start": "2015-01-01",
              "end": "2015-03-31",
              "val": 136000000,
              "accn": "0000922621-15-000019",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-30",
              "frame": "CY2015Q1"
            },
            {
              "start": "2015-01-01",
              "end": "2015-06-30",
              "val": 333000000,
              "accn": "0000922621-15-000032",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-30"
            },
            {
              "start": "2015-04-01",
              "end": "2015-06-30",
              "val": 197000000,
              "accn": "0000922621-15-000032",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-30",
              "frame": "CY2015Q2"
            },
            {
              "start": "2015-01-01",
              "end": "2015-09-30",
              "val": 366000000,
              "accn": "0000922621-15-000048",
              "fy": 2015,
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              "form": "10-Q",
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            {
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              "end": "2015-09-30",
              "val": 33000000,
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              "fy": 2015,
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              "form": "10-Q",
              "filed": "2015-10-29",
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      },
      "ProvisionForLoanLossesExpensed": {
        "label": "Financing Receivable, Credit Loss, Expense (Reversal)",
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              "start": "2019-01-01",
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            {
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              "val": 170000,
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            {
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              "val": 170000,
              "accn": "0000922621-20-000030",
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            {
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              "val": 170000,
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              "fy": 2021,
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              "filed": "2021-07-29"
            },
            {
              "start": "2020-04-01",
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              "val": 0,
              "accn": "0000922621-20-000030",
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            {
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              "val": 170000,
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            },
            {
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            {
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            {
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            },
            {
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            },
            {
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              "val": 297000,
              "accn": "0000922621-23-000007",
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              "fp": "FY",
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              "filed": "2023-03-01",
              "frame": "CY2020"
            },
            {
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              "val": 0,
              "accn": "0000922621-21-000022",
              "fy": 2021,
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              "frame": "CY2021Q1"
            },
            {
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            {
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            },
            {
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            {
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              "end": "2021-09-30",
              "val": -153000,
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              "fp": "Q3",
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              "filed": "2022-10-27"
            },
            {
              "start": "2021-07-01",
              "end": "2021-09-30",
              "val": -153000,
              "accn": "0000922621-21-000048",
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-10-28"
            },
            {
              "start": "2021-07-01",
              "end": "2021-09-30",
              "val": -153000,
              "accn": "0000922621-22-000038",
              "fy": 2022,
              "fp": "Q3",
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              "filed": "2022-10-27",
              "frame": "CY2021Q3"
            },
            {
              "start": "2021-01-01",
              "end": "2021-12-31",
              "val": -152000,
              "accn": "0000922621-22-000013",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-24"
            },
            {
              "start": "2021-01-01",
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              "val": -152000,
              "accn": "0000922621-23-000007",
              "fy": 2022,
              "fp": "FY",
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              "frame": "CY2021"
            },
            {
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              "val": 0,
              "accn": "0000922621-22-000038",
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              "filed": "2022-10-27"
            },
            {
              "start": "2022-07-01",
              "end": "2022-09-30",
              "val": 0,
              "accn": "0000922621-22-000038",
              "fy": 2022,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2022-10-27",
              "frame": "CY2022Q3"
            },
            {
              "start": "2022-01-01",
              "end": "2022-12-31",
              "val": 0,
              "accn": "0000922621-23-000007",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-03-01",
              "frame": "CY2022"
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          ]
        }
      },
      "RealizedGainLossOnMarketableSecuritiesAndCostMethodInvestmentsExcludingOtherThanTemporaryImpairmentsAndOtherInvestments": {
        "label": "Realized Gain (Loss) on Marketable Securities and Cost Method Investments, Excluding Other than Temporary Impairments, and Other Investments (Deprecated 2018-01-31)",
        "description": "This item represents the net total realized gain (loss) included in earnings for the period as a result of selling or holding marketable securities categorized as trading, available-for-sale, or held-to-maturity, including the unrealized holding gain or loss of held-to-maturity securities transferred to the trading security category and the cumulative unrealized gain or loss which was included in other comprehensive income (a separate component of shareholders' equity) for available-for-sale securities transferred to trading securities during the period. Additionally, this item would include any gains (losses) realized during the period from the sale of investments accounted for under the cost method of accounting and/or investments that are separately or otherwise not categorized as trading, available-for-sale, or held-to-maturity.",
        "units": {
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              "val": 1057000,
              "accn": "0000922621-17-000008",
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              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-23",
              "frame": "CY2014"
            },
            {
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              "end": "2015-09-30",
              "val": -125000,
              "accn": "0000922621-16-000113",
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            },
            {
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              "filed": "2016-10-27",
              "frame": "CY2015Q3"
            },
            {
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              "accn": "0000922621-17-000008",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-23"
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              "accn": "0000922621-15-000019",
              "fy": 2015,
              "fp": "Q1",
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              "filed": "2015-04-30",
              "frame": "CY2014Q1"
            },
            {
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              "end": "2014-06-30",
              "val": 189000000,
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              "fp": "Q2",
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            },
            {
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              "end": "2014-06-30",
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            },
            {
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              "end": "2014-06-30",
              "val": 133000000,
              "accn": "0000922621-14-000029",
              "fy": 2014,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2014-07-31"
            },
            {
              "start": "2014-04-01",
              "end": "2014-06-30",
              "val": 133000000,
              "accn": "0000922621-15-000032",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-30",
              "frame": "CY2014Q2"
            },
            {
              "start": "2014-01-01",
              "end": "2014-09-30",
              "val": 104000000,
              "accn": "0000922621-14-000037",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-30"
            },
            {
              "start": "2014-01-01",
              "end": "2014-09-30",
              "val": 104000000,
              "accn": "0000922621-15-000048",
              "fy": 2015,
              "fp": "Q3",
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              "filed": "2015-10-29"
            },
            {
              "start": "2014-07-01",
              "end": "2014-09-30",
              "val": -85000000,
              "accn": "0000922621-14-000037",
              "fy": 2014,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2014-10-30"
            },
            {
              "start": "2014-07-01",
              "end": "2014-09-30",
              "val": -85000000,
              "accn": "0000922621-15-000048",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-29",
              "frame": "CY2014Q3"
            },
            {
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              "end": "2014-12-31",
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              "accn": "0000922621-15-000008",
              "fy": 2014,
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              "filed": "2015-02-26"
            },
            {
              "start": "2014-01-01",
              "end": "2014-12-31",
              "val": 1057000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2014"
            },
            {
              "start": "2015-01-01",
              "end": "2015-03-31",
              "val": 56000000,
              "accn": "0000922621-15-000019",
              "fy": 2015,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2015-04-30"
            },
            {
              "start": "2015-01-01",
              "end": "2015-03-31",
              "val": -240000,
              "accn": "0000922621-16-000077",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-04-28",
              "frame": "CY2015Q1"
            },
            {
              "start": "2015-01-01",
              "end": "2015-06-30",
              "val": 49000000,
              "accn": "0000922621-15-000032",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-30"
            },
            {
              "start": "2015-01-01",
              "end": "2015-06-30",
              "val": 358000,
              "accn": "0000922621-16-000102",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-28"
            },
            {
              "start": "2015-04-01",
              "end": "2015-06-30",
              "val": -7000000,
              "accn": "0000922621-15-000032",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-30"
            },
            {
              "start": "2015-04-01",
              "end": "2015-06-30",
              "val": 598000,
              "accn": "0000922621-16-000102",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-28",
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            },
            {
              "start": "2015-01-01",
              "end": "2015-09-30",
              "val": -243000000,
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              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-29"
            },
            {
              "start": "2015-07-01",
              "end": "2015-09-30",
              "val": -292000000,
              "accn": "0000922621-15-000048",
              "fy": 2015,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2015-10-29",
              "frame": "CY2015Q3"
            },
            {
              "start": "2015-01-01",
              "end": "2015-12-31",
              "val": 492000,
              "accn": "0000922621-16-000067",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-25",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-03-31",
              "val": -1088000,
              "accn": "0000922621-16-000077",
              "fy": 2016,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2016-04-28",
              "frame": "CY2016Q1"
            },
            {
              "start": "2016-01-01",
              "end": "2016-06-30",
              "val": -689000,
              "accn": "0000922621-16-000102",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-28"
            },
            {
              "start": "2016-04-01",
              "end": "2016-06-30",
              "val": 399000,
              "accn": "0000922621-16-000102",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-28",
              "frame": "CY2016Q2"
            }
          ]
        }
      },
      "ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAmountAssumedFromOtherCompanies": {
        "label": "Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Assumed from Other Companies (Deprecated 2013-01-31)",
        "description": "Amount of premiums assumed from other companies.",
        "units": {
          "USD": [
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              "start": "2008-12-31",
              "end": "2009-12-31",
              "val": 42000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2009"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 20000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2010"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 20000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 21000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 21000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 21000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012"
            }
          ]
        }
      },
      "ReinsurancePremiumsForInsuranceCompaniesByProductSegmentAmountCededToOtherCompanies": {
        "label": "Reinsurance Premiums for Insurance Companies, by Product Segment, Amount Ceded to Other Companies (Deprecated 2013-01-31)",
        "description": "Amount of premiums ceded to other companies.",
        "units": {
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              "start": "2008-12-31",
              "end": "2009-12-31",
              "val": 79000000,
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              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2009"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 76000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2010"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 76000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 79000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 79000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 90000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012"
            }
          ]
        }
      },
      "ReinsurancePremiumsForInsuranceCompaniesByProductSegmentGrossAmount": {
        "label": "Reinsurance Premiums for Insurance Companies, by Product Segment, Gross Amount (Deprecated 2013-01-31)",
        "description": "Gross amount of premium revenue.",
        "units": {
          "USD": [
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              "start": "2008-12-31",
              "end": "2009-12-31",
              "val": 3906000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2009"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 4043000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2010"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 4043000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
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              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 4272000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 4272000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 4562000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012"
            }
          ]
        }
      },
      "ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmount": {
        "label": "Reinsurance Premiums for Insurance Companies, by Product Segment, Net Amount (Deprecated 2013-01-31)",
        "description": "Net amount of gross premiums, less premiums ceded to other companies, plus premiums assumed from other companies; which represents the net amount of premium revenue on the income statement.",
        "units": {
          "USD": [
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              "start": "2008-12-31",
              "end": "2009-12-31",
              "val": 3869000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2009"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 3987000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2010"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 3987000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
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              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 4214000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011"
            },
            {
              "start": "2010-12-31",
              "end": "2011-12-31",
              "val": 4214000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 4493000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012"
            }
          ]
        }
      },
      "ReinsurancePremiumsForInsuranceCompaniesByProductSegmentPercentageOfAmountAssumedToNet": {
        "label": "Reinsurance Premiums for Insurance Companies, by Product Segment, Percentage of Amount Assumed to Net (Deprecated 2013-01-31)",
        "description": "Percentage of amount of premiums assumed from other companies to net amount of premiums.",
        "units": {
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              "start": "2008-12-31",
              "end": "2009-12-31",
              "val": 0.011,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2009"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 0.005,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2010"
            },
            {
              "start": "2009-12-31",
              "end": "2010-12-31",
              "val": 0.005,
              "accn": "0001104659-12-013263",
              "fy": 2011,
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            {
              "start": "2010-12-31",
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              "val": 0.005,
              "accn": "0001445305-13-000346",
              "fy": 2012,
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              "form": "10-K",
              "filed": "2013-02-26",
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            },
            {
              "start": "2010-12-31",
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              "val": 0.005,
              "accn": "0001104659-12-013263",
              "fy": 2011,
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              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 0.005,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2012"
            }
          ]
        }
      },
      "ReinsuranceRecoverables": {
        "label": "Reinsurance Recoverables, Including Reinsurance Premium Paid",
        "description": "Amount, after valuation allowance, recoverable under reinsurance contracts including premium paid under reinsurance contracts. Examples include, but are not limited to, settled and unsettled claims, incurred but not reported losses, loss adjustment expense, premium paid, policy benefits and policy reserves.",
        "units": {
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              "val": 215000000,
              "accn": "0000950123-10-078550",
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              "fp": "Q2",
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              "filed": "2010-08-17"
            },
            {
              "end": "2009-12-31",
              "val": 215000000,
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              "fy": 2010,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2010-11-04"
            },
            {
              "end": "2009-12-31",
              "val": 215000000,
              "accn": "0000950123-11-017950",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-24",
              "frame": "CY2009Q4I"
            },
            {
              "end": "2010-06-30",
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              "fy": 2010,
              "fp": "Q2",
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              "filed": "2010-11-04",
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            {
              "end": "2010-12-31",
              "val": 201000000,
              "accn": "0000950123-11-017950",
              "fy": 2010,
              "fp": "FY",
              "form": "10-K",
              "filed": "2011-02-24"
            },
            {
              "end": "2010-12-31",
              "val": 201000000,
              "accn": "0001104659-11-026329",
              "fy": 2011,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2011-05-05"
            },
            {
              "end": "2010-12-31",
              "val": 201000000,
              "accn": "0001104659-11-049441",
              "fy": 2011,
              "fp": "Q2",
              "form": "10-Q/A",
              "filed": "2011-08-30"
            },
            {
              "end": "2010-12-31",
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              "accn": "0001104659-11-060593",
              "fy": 2011,
              "fp": "Q3",
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            {
              "end": "2010-12-31",
              "val": 201000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27",
              "frame": "CY2010Q4I"
            },
            {
              "end": "2011-03-31",
              "val": 199000000,
              "accn": "0001104659-11-026329",
              "fy": 2011,
              "fp": "Q1",
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              "filed": "2011-05-05",
              "frame": "CY2011Q1I"
            },
            {
              "end": "2011-06-30",
              "val": 198000000,
              "accn": "0001104659-11-049441",
              "fy": 2011,
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              "form": "10-Q/A",
              "filed": "2011-08-30",
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              "end": "2011-09-30",
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              "fp": "Q3",
              "form": "10-Q",
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              "frame": "CY2011Q3I"
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            {
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              "val": 166000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
            },
            {
              "end": "2011-12-31",
              "val": 166000000,
              "accn": "0001104659-12-032634",
              "fy": 2012,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2012-05-03"
            },
            {
              "end": "2011-12-31",
              "val": 166000000,
              "accn": "0001104659-12-053745",
              "fy": 2012,
              "fp": "Q2",
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            {
              "end": "2011-12-31",
              "val": 166000000,
              "accn": "0001104659-12-073242",
              "fy": 2012,
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            },
            {
              "end": "2011-12-31",
              "val": 166000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011Q4I"
            },
            {
              "end": "2012-03-31",
              "val": 167000000,
              "accn": "0001104659-12-032634",
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            {
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              "end": "2012-12-31",
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        "label": "SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters, Earned Premium",
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            {
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            {
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              "filed": "2013-02-26"
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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": "2015-02-26",
              "frame": "CY2014"
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        "label": "SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters, Interest Rate at which Discount Computed",
        "description": "Rate at which discount was computed for deduction from reserve for unpaid claim and claim adjustment expense by property-casualty insurance underwriter.",
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      "SupplementalInformationForPropertyCasualtyInsuranceUnderwritersNetInvestmentIncome": {
        "label": "SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters, Net Investment Income",
        "description": "Amount of net investment income earned by property-casualty insurance underwriter.",
        "units": {
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              "frame": "CY2009"
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              "filed": "2015-02-26",
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              "end": "2012-12-31",
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              "end": "2013-12-31",
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              "filed": "2013-02-26",
              "frame": "CY2010"
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              "end": "2011-12-31",
              "val": 680000000,
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              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011"
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            {
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              "end": "2011-12-31",
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              "fy": 2013,
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              "filed": "2014-02-27"
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            {
              "start": "2012-01-01",
              "end": "2012-12-31",
              "val": 715000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
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              "end": "2012-12-31",
              "val": 715000000,
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              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-27"
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            {
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              "accn": "0000922621-15-000008",
              "fy": 2014,
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              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2012"
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            {
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              "end": "2013-12-31",
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              "accn": "0000922621-14-000008",
              "fy": 2013,
              "fp": "FY",
              "form": "10-K",
              "filed": "2014-02-27"
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            {
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              "end": "2013-12-31",
              "val": 778000000,
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              "fy": 2014,
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              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2013"
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            {
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              "val": 849000000,
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              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014"
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      "SupplementaryInsuranceInformationBenefitsClaimsLossesAndSettlementExpense": {
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        "description": "Amount of insurance benefit, claim, loss and settlement expenses incurred, as disclosed in supplementary insurance information.",
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              "filed": "2014-02-27"
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              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
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            {
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              "form": "10-K",
              "filed": "2015-02-26",
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            {
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              "filed": "2014-02-27"
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        "label": "SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Liability for Future Policy Benefit, Loss, Claim and Loss Expense",
        "description": "Amount of reserve for future policy claim payable and loss expense to be incurred, disclosed in supplementary insurance information.",
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              "filed": "2013-02-26",
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              "filed": "2014-02-27",
              "frame": "CY2011Q4I"
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      "SupplementaryInsuranceInformationNetInvestmentIncome": {
        "label": "SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Net Investment Income",
        "description": "Amount of net investment income earned, disclosed in supplementary insurance information.",
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              "end": "2009-12-31",
              "val": 433000000,
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              "frame": "CY2009"
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              "end": "2010-12-31",
              "val": 433000000,
              "accn": "0001104659-12-013263",
              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
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            {
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              "end": "2010-12-31",
              "val": 433000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
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              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2010"
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            {
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              "end": "2011-12-31",
              "val": 433000000,
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              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
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            {
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              "end": "2011-12-31",
              "val": 433000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
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              "form": "10-K",
              "filed": "2013-02-26",
              "frame": "CY2011"
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            {
              "start": "2011-01-01",
              "end": "2011-12-31",
              "val": 433000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
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              "form": "10-K",
              "filed": "2014-02-27"
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            {
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              "end": "2012-12-31",
              "val": 438000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
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            {
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              "end": "2012-12-31",
              "val": 438000000,
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              "fy": 2013,
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              "form": "10-K",
              "filed": "2014-02-27"
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            {
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              "val": 438000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2012"
            },
            {
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              "val": 422000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
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              "filed": "2014-02-27"
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            {
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              "filed": "2015-02-26",
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              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2014"
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      "SupplementaryInsuranceInformationOtherOperatingExpense": {
        "label": "SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information, Other Operating Expense",
        "description": "Amount of operating expense classified as other, disclosed in supplementary insurance information.",
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              "frame": "CY2009"
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              "val": 318000000,
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              "fy": 2011,
              "fp": "FY",
              "form": "10-K",
              "filed": "2012-02-27"
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              "filed": "2013-02-26",
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              "val": 342000000,
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              "fy": 2011,
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              "form": "10-K",
              "filed": "2012-02-27"
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              "val": 342000000,
              "accn": "0001445305-13-000346",
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              "fp": "FY",
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              "filed": "2013-02-26",
              "frame": "CY2011"
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              "val": 342000000,
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              "filed": "2014-02-27"
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              "val": 418000000,
              "accn": "0001445305-13-000346",
              "fy": 2012,
              "fp": "FY",
              "form": "10-K",
              "filed": "2013-02-26"
            },
            {
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              "end": "2012-12-31",
              "val": 418000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
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              "filed": "2014-02-27"
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            {
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              "val": 418000000,
              "accn": "0000922621-15-000008",
              "fy": 2014,
              "fp": "FY",
              "form": "10-K",
              "filed": "2015-02-26",
              "frame": "CY2012"
            },
            {
              "start": "2013-01-01",
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              "val": 459000000,
              "accn": "0000922621-14-000008",
              "fy": 2013,
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              "form": "10-K",
              "filed": "2014-02-27"
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            {
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              "val": 487000000,
              "accn": "0000922621-15-000008",
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              "val": 3987000000,
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              "form": "10-K",
              "filed": "2012-02-27"
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        "label": "Proceeds from Income Tax Refunds",
        "description": "The amount of cash received during the period as refunds for the overpayment of taxes.",
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        "label": "Restricted Investments, Noncurrent",
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          ]
        }
      },
      "CurrentStateAndLocalTaxExpenseBenefit": {
        "label": "Current State and Local Tax Expense (Benefit)",
        "description": "Amount of current state and local tax expense (benefit) pertaining to income (loss) from continuing operations.",
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      },
      "DeferredFederalIncomeTaxExpenseBenefit": {
        "label": "Deferred Federal Income Tax Expense (Benefit)",
        "description": "Amount of deferred federal income tax expense (benefit) pertaining to income (loss) from continuing operations.",
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      },
      "DeferredStateAndLocalIncomeTaxExpenseBenefit": {
        "label": "Deferred State and Local Income Tax Expense (Benefit)",
        "description": "Amount of deferred state and local tax expense (benefit) pertaining to income (loss) from continuing operations.",
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      },
      "DeferredTaxAssetsCharitableContributionCarryforwards": {
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      },
      "EffectiveIncomeTaxRateReconciliationNondeductibleExpense": {
        "label": "Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent",
        "description": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses.",
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          ]
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      },
      "EffectiveIncomeTaxRateReconciliationOtherAdjustments": {
        "label": "Effective Income Tax Rate Reconciliation, Other Adjustments, Percent",
        "description": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.",
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        }
      },
      "EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes": {
        "label": "Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent",
        "description": "Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations applicable to state and local income tax expense (benefit), net of federal tax expense (benefit).",
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