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      "AdditionalPaidInCapital": {
        "label": "Additional Paid in Capital",
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            {
              "end": "2017-03-31",
              "val": 4589000000,
              "accn": "0001633917-17-000075",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-04-27",
              "frame": "CY2017Q1I"
            },
            {
              "end": "2017-06-30",
              "val": 4788000000,
              "accn": "0001633917-17-000136",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-07-27",
              "frame": "CY2017Q2I"
            },
            {
              "end": "2017-09-30",
              "val": 4226000000,
              "accn": "0001633917-17-000171",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-10-24",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2017-12-31",
              "val": 4169000000,
              "accn": "0001633917-18-000029",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-07"
            },
            {
              "end": "2017-12-31",
              "val": 4169000000,
              "accn": "0001633917-18-000096",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-26",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-03-31",
              "val": 4247000000,
              "accn": "0001633917-18-000096",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-26",
              "frame": "CY2018Q1I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss",
        "description": "Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position.",
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              "end": "2015-12-31",
              "val": 16000000,
              "accn": "0001633917-16-000113",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-11",
              "frame": "CY2015Q4I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue": {
        "label": "Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value",
        "description": "This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.",
        "units": {
          "USD": [
            {
              "end": "2015-12-31",
              "val": 4300000000,
              "accn": "0001633917-16-000113",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-11",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 2200000000,
              "accn": "0001633917-17-000027",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-08"
            },
            {
              "end": "2016-12-31",
              "val": 2200000000,
              "accn": "0001633917-18-000029",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-07",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 2800000000,
              "accn": "0001633917-18-000029",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-07",
              "frame": "CY2017Q4I"
            }
          ]
        }
      },
      "AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue": {
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        "description": "This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer.",
        "units": {
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              "fy": 2017,
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              "form": "10-K",
              "filed": "2018-02-07",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 207000000,
              "accn": "0001633917-18-000029",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-07"
            },
            {
              "end": "2017-12-31",
              "val": 207000000,
              "accn": "0001633917-18-000096",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-26",
              "frame": "CY2017Q4I"
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            {
              "end": "2018-03-31",
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              "accn": "0001633917-18-000096",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-26",
              "frame": "CY2018Q1I"
            }
          ]
        }
      },
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        "label": "Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10",
        "description": "Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
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              "val": 6000000,
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            {
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              "val": 6000000,
              "accn": "0001633917-19-000180",
              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-07-25",
              "frame": "CY2019Q2I"
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            {
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              "accn": "0001633917-19-000210",
              "fy": 2019,
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              "filed": "2019-10-24",
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            },
            {
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              "fy": 2019,
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              "accn": "0001633917-24-000048",
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              "frame": "CY2024Q2I"
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              "accn": "0001633917-24-000110",
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              "accn": "0001633917-26-000024",
              "fy": 2025,
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              "frame": "CY2025Q4I"
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              "fy": 2026,
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              "frame": "CY2026Q1I"
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          ]
        }
      },
      "AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue": {
        "label": "Debt Securities, Available-for-Sale, Fair Value, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10",
        "description": "Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
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              "val": 6000000,
              "accn": "0001633917-19-000118",
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              "filed": "2019-09-16"
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            {
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              "fy": 2018,
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              "accn": "0001633917-20-000028",
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              "form": "10-K",
              "filed": "2020-02-06"
            },
            {
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              "end": "2018-12-31",
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              "fy": 2020,
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              "frame": "CY2018"
            },
            {
              "start": "2026-01-01",
              "end": "2026-03-31",
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      "BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNet": {
        "label": "Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net",
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        "label": "Capital Expenditures Incurred but Not yet Paid",
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              "fp": "FY",
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              "filed": "2017-02-08",
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            },
            {
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              "end": "2016-12-31",
              "val": 35000000,
              "accn": "0001633917-17-000027",
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              "filed": "2017-02-08"
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            {
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              "accn": "0001633917-19-000043",
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              "filed": "2019-02-07"
            },
            {
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              "form": "8-K",
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            },
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              "filed": "2019-09-16"
            },
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            },
            {
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              "accn": "0001633917-20-000028",
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              "filed": "2020-02-06",
              "frame": "CY2019"
            },
            {
              "start": "2023-01-01",
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              "accn": "0001633917-26-000024",
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              "filed": "2026-02-03",
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            },
            {
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              "fp": "FY",
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              "filed": "2026-02-03",
              "frame": "CY2024"
            },
            {
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              "end": "2025-12-31",
              "val": 9000000,
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              "fy": 2025,
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          ]
        }
      },
      "CapitalizedComputerSoftwareAdditions": {
        "label": "Capitalized Computer Software, Additions",
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              "filed": "2016-02-11",
              "frame": "CY2014"
            },
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              "val": 254000000,
              "accn": "0001633917-16-000113",
              "fy": 2015,
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              "filed": "2016-02-11"
            },
            {
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              "end": "2015-12-31",
              "val": 254000000,
              "accn": "0001633917-17-000027",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-08",
              "frame": "CY2015"
            },
            {
              "start": "2016-01-01",
              "end": "2016-12-31",
              "val": 341000000,
              "accn": "0001633917-17-000027",
              "fy": 2016,
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              "form": "10-K",
              "filed": "2017-02-08"
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              "end": "2016-12-31",
              "val": 341000000,
              "accn": "0001633917-18-000029",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-07",
              "frame": "CY2016"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 309000000,
              "accn": "0001633917-18-000029",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-07"
            },
            {
              "start": "2017-01-01",
              "end": "2017-12-31",
              "val": 309000000,
              "accn": "0001633917-19-000043",
              "fy": 2018,
              "fp": "FY",
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              "filed": "2019-02-07"
            },
            {
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              "accn": "0001633917-19-000200",
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              "filed": "2019-09-16",
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            },
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              "end": "2018-12-31",
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              "accn": "0001633917-19-000043",
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              "filed": "2019-02-07"
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              "filed": "2019-09-16"
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            },
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            },
            {
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              "end": "2019-12-31",
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              "filed": "2021-02-05",
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            },
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      },
      "CapitalizedComputerSoftwareAmortization": {
        "label": "Capitalized Computer Software, Amortization (Deprecated 2016-01-31)",
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              "filed": "2017-02-08",
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              "filed": "2017-02-08",
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              "accn": "0001633917-17-000027",
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              "filed": "2017-02-08",
              "frame": "CY2016"
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          ]
        }
      },
      "CapitalizedComputerSoftwareAmortization1": {
        "label": "Capitalized Computer Software, Amortization",
        "description": "Amount of expense for amortization of capitalized computer software costs.",
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              "accn": "0001633917-18-000029",
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              "filed": "2022-02-03",
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          ]
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              "filed": "2016-02-11",
              "frame": "CY2013"
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              "end": "2014-06-30",
              "val": 87000000,
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              "end": "2016-03-31",
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              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-25"
            },
            {
              "end": "2015-12-31",
              "val": 1505000000,
              "accn": "0001633917-17-000027",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-08",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-06-30",
              "val": 1591000000,
              "accn": "0001633917-16-000203",
              "fy": 2016,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2016-07-26",
              "frame": "CY2016Q2I"
            },
            {
              "end": "2016-09-30",
              "val": 1548000000,
              "accn": "0001633917-16-000243",
              "fy": 2016,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2016-10-25",
              "frame": "CY2016Q3I"
            },
            {
              "end": "2016-12-31",
              "val": 1513000000,
              "accn": "0001633917-17-000027",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-08"
            },
            {
              "end": "2016-12-31",
              "val": 1513000000,
              "accn": "0001633917-17-000075",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-04-27"
            },
            {
              "end": "2016-12-31",
              "val": 1513000000,
              "accn": "0001633917-17-000136",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-07-27"
            },
            {
              "end": "2016-12-31",
              "val": 1513000000,
              "accn": "0001633917-17-000171",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-10-24"
            },
            {
              "end": "2016-12-31",
              "val": 1513000000,
              "accn": "0001633917-18-000029",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-07",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-03-31",
              "val": 1581000000,
              "accn": "0001633917-17-000075",
              "fy": 2017,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2017-04-27",
              "frame": "CY2017Q1I"
            },
            {
              "end": "2017-06-30",
              "val": 1651000000,
              "accn": "0001633917-17-000136",
              "fy": 2017,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2017-07-27",
              "frame": "CY2017Q2I"
            },
            {
              "end": "2017-09-30",
              "val": 1626000000,
              "accn": "0001633917-17-000171",
              "fy": 2017,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2017-10-24",
              "frame": "CY2017Q3I"
            },
            {
              "end": "2017-12-31",
              "val": 1917000000,
              "accn": "0001633917-18-000029",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-07"
            },
            {
              "end": "2017-12-31",
              "val": 1917000000,
              "accn": "0001633917-18-000096",
              "fy": 2018,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2018-04-26"
            },
            {
              "end": "2017-12-31",
              "val": 1917000000,
              "accn": "0001633917-18-000171",
              "fy": 2018,
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              "form": "10-Q",
              "filed": "2018-07-26",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-03-31",
              "val": 1967000000,
              "accn": "0001633917-18-000096",
              "fy": 2018,
              "fp": "Q1",
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              "filed": "2018-04-26",
              "frame": "CY2018Q1I"
            },
            {
              "end": "2018-06-30",
              "val": 1849000000,
              "accn": "0001633917-18-000171",
              "fy": 2018,
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              "form": "10-Q",
              "filed": "2018-07-26",
              "frame": "CY2018Q2I"
            }
          ]
        }
      },
      "LoansAndLeasesReceivableConsumer": {
        "label": "Loans and Leases Receivable, Gross, Consumer (Deprecated 2016-01-31)",
        "description": "Amount before allowance of consumer loans, including, but not limited to, mortgage, home equity, vehicles, credit card, installment, and lease financing. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.",
        "units": {
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              "end": "2014-12-31",
              "val": 3677000000,
              "accn": "0001633917-15-000008",
              "fy": 2015,
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              "form": "10-Q",
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              "frame": "CY2014Q4I"
            },
            {
              "end": "2015-06-30",
              "val": 3086000000,
              "accn": "0001633917-15-000008",
              "fy": 2015,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2015-07-29",
              "frame": "CY2015Q2I"
            }
          ]
        }
      },
      "LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive": {
        "label": "Long-Term Debt, Maturity, after Year Five",
        "description": "Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
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              "end": "2019-09-30",
              "val": 4000000000,
              "accn": "0001633917-19-000210",
              "fy": 2019,
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              "form": "10-Q",
              "filed": "2019-10-24",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 2750000000,
              "accn": "0001633917-20-000028",
              "fy": 2019,
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              "form": "10-K",
              "filed": "2020-02-06",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
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              "accn": "0001633917-21-000018",
              "fy": 2020,
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              "filed": "2021-02-05",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-12-31",
              "val": 3500000000,
              "accn": "0001633917-22-000027",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-03",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-12-31",
              "val": 6000000000,
              "accn": "0001633917-23-000033",
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            {
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              "accn": "0001633917-24-000024",
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            },
            {
              "end": "2024-12-31",
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              "fy": 2024,
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              "filed": "2026-02-03",
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          ]
        }
      },
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        "label": "Long-Term Debt, Maturity, Year One",
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              "frame": "CY2020Q3I"
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            {
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              "accn": "0001633917-21-000018",
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              "accn": "0001633917-21-000149",
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              "frame": "CY2021Q4I"
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              "frame": "CY2022Q2I"
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            {
              "end": "2022-09-30",
              "val": 418000000,
              "accn": "0001633917-22-000167",
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              "frame": "CY2022Q3I"
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            {
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              "accn": "0001633917-23-000033",
              "fy": 2022,
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              "form": "10-K",
              "filed": "2023-02-10",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-03-31",
              "val": 1250000000,
              "accn": "0001633917-23-000072",
              "fy": 2023,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2023-05-09",
              "frame": "CY2023Q1I"
            },
            {
              "end": "2023-06-30",
              "val": 1250000000,
              "accn": "0001633917-23-000117",
              "fy": 2023,
              "fp": "Q2",
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              "frame": "CY2023Q2I"
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            {
              "end": "2023-09-30",
              "val": 1250000000,
              "accn": "0001633917-23-000156",
              "fy": 2023,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2023-11-02",
              "frame": "CY2023Q3I"
            },
            {
              "end": "2023-12-31",
              "val": 1250000000,
              "accn": "0001633917-24-000024",
              "fy": 2023,
              "fp": "FY",
              "form": "10-K",
              "filed": "2024-02-08",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-03-31",
              "val": 1198000000,
              "accn": "0001633917-24-000048",
              "fy": 2024,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2024-04-30",
              "frame": "CY2024Q1I"
            },
            {
              "end": "2024-06-30",
              "val": 1186000000,
              "accn": "0001633917-24-000098",
              "fy": 2024,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2024-07-30",
              "frame": "CY2024Q2I"
            },
            {
              "end": "2024-09-30",
              "val": 1211000000,
              "accn": "0001633917-24-000110",
              "fy": 2024,
              "fp": "Q3",
              "form": "10-Q",
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              "frame": "CY2024Q3I"
            },
            {
              "end": "2024-12-31",
              "val": 1191000000,
              "accn": "0001633917-25-000019",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-04",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-03-31",
              "val": 1404000000,
              "accn": "0001633917-25-000064",
              "fy": 2025,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2025-04-29",
              "frame": "CY2025Q1I"
            },
            {
              "end": "2025-06-30",
              "val": 1409000000,
              "accn": "0001633917-25-000161",
              "fy": 2025,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2025-07-29",
              "frame": "CY2025Q2I"
            },
            {
              "end": "2025-09-30",
              "val": 1405000000,
              "accn": "0001633917-25-000196",
              "fy": 2025,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2025-10-28",
              "frame": "CY2025Q3I"
            },
            {
              "end": "2025-12-31",
              "val": 1397000000,
              "accn": "0001633917-26-000024",
              "fy": 2025,
              "fp": "FY",
              "form": "10-K",
              "filed": "2026-02-03",
              "frame": "CY2025Q4I"
            },
            {
              "end": "2026-03-31",
              "val": 500000000,
              "accn": "0001633917-26-000067",
              "fy": 2026,
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              "form": "10-Q",
              "filed": "2026-05-05",
              "frame": "CY2026Q1I"
            }
          ]
        }
      },
      "LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive": {
        "label": "Long-Term Debt, Maturity, Year Five",
        "description": "Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).",
        "units": {
          "USD": [
            {
              "end": "2019-09-30",
              "val": 0,
              "accn": "0001633917-19-000210",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 1250000000,
              "accn": "0001633917-20-000028",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-06",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-12-31",
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              "accn": "0001633917-21-000018",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-05",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-12-31",
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              "accn": "0001633917-22-000027",
              "fy": 2021,
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              "form": "10-K",
              "filed": "2022-02-03",
              "frame": "CY2021Q4I"
            },
            {
              "end": "2022-12-31",
              "val": 500000000,
              "accn": "0001633917-23-000033",
              "fy": 2022,
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              "form": "10-K",
              "filed": "2023-02-10",
              "frame": "CY2022Q4I"
            },
            {
              "end": "2023-12-31",
              "val": 262000000,
              "accn": "0001633917-24-000024",
              "fy": 2023,
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              "form": "10-K",
              "filed": "2024-02-08",
              "frame": "CY2023Q4I"
            },
            {
              "end": "2024-12-31",
              "val": 1500000000,
              "accn": "0001633917-25-000019",
              "fy": 2024,
              "fp": "FY",
              "form": "10-K",
              "filed": "2025-02-04",
              "frame": "CY2024Q4I"
            },
            {
              "end": "2025-12-31",
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              "accn": "0001633917-26-000024",
              "fy": 2025,
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              "frame": "CY2025Q4I"
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          ]
        }
      },
      "LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour": {
        "label": "Long-Term Debt, Maturity, Year Four",
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        "units": {
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              "val": 1000000000,
              "accn": "0001633917-19-000210",
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              "form": "10-Q",
              "filed": "2019-10-24",
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            },
            {
              "end": "2019-12-31",
              "val": 0,
              "accn": "0001633917-20-000028",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-06",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-06-30",
              "val": 1250000000,
              "accn": "0001633917-20-000134",
              "fy": 2020,
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            },
            {
              "end": "2020-09-30",
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              "end": "2020-12-31",
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              "fy": 2021,
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              "form": "10-Q",
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              "frame": "CY2021Q2I"
            },
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              "accn": "0001633917-21-000169",
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            },
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              "frame": "CY2021Q4I"
            },
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              "accn": "0001633917-22-000088",
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              "frame": "CY2022Q1I"
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              "frame": "CY2022Q2I"
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              "val": 1250000000,
              "accn": "0001633917-22-000167",
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              "form": "10-Q",
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              "frame": "CY2022Q3I"
            },
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              "val": 1250000000,
              "accn": "0001633917-23-000033",
              "fy": 2022,
              "fp": "FY",
              "form": "10-K",
              "filed": "2023-02-10",
              "frame": "CY2022Q4I"
            },
            {
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              "form": "10-K",
              "filed": "2019-02-07"
            },
            {
              "end": "2018-12-31",
              "val": 664000000,
              "accn": "0001633917-19-000118",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-25"
            },
            {
              "end": "2018-12-31",
              "val": 664000000,
              "accn": "0001633917-19-000180",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-25"
            },
            {
              "end": "2018-12-31",
              "val": 664000000,
              "accn": "0001633917-19-000200",
              "fy": 2018,
              "fp": "FY",
              "form": "8-K",
              "filed": "2019-09-16"
            },
            {
              "end": "2018-12-31",
              "val": 664000000,
              "accn": "0001633917-19-000210",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24"
            },
            {
              "end": "2018-12-31",
              "val": 664000000,
              "accn": "0001633917-20-000028",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-06",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueCurrent": {
        "label": "Operating Leases, Future Minimum Payments Due, Next Twelve Months",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2015-12-31",
              "val": 55000000,
              "accn": "0001633917-16-000113",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-11",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 102000000,
              "accn": "0001633917-17-000027",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-08",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 119000000,
              "accn": "0001633917-18-000029",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-07",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 124000000,
              "accn": "0001633917-19-000043",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-07"
            },
            {
              "end": "2018-12-31",
              "val": 124000000,
              "accn": "0001633917-19-000118",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-25"
            },
            {
              "end": "2018-12-31",
              "val": 124000000,
              "accn": "0001633917-19-000180",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-25"
            },
            {
              "end": "2018-12-31",
              "val": 124000000,
              "accn": "0001633917-19-000200",
              "fy": 2018,
              "fp": "FY",
              "form": "8-K",
              "filed": "2019-09-16"
            },
            {
              "end": "2018-12-31",
              "val": 124000000,
              "accn": "0001633917-19-000210",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24"
            },
            {
              "end": "2018-12-31",
              "val": 124000000,
              "accn": "0001633917-20-000028",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-06",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueInFiveYears": {
        "label": "Operating Leases, Future Minimum Payments, Due in Five Years",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2015-12-31",
              "val": 32000000,
              "accn": "0001633917-16-000113",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-11",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 47000000,
              "accn": "0001633917-17-000027",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-08",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 50000000,
              "accn": "0001633917-18-000029",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-07",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 63000000,
              "accn": "0001633917-19-000043",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-07"
            },
            {
              "end": "2018-12-31",
              "val": 63000000,
              "accn": "0001633917-19-000118",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-25"
            },
            {
              "end": "2018-12-31",
              "val": 63000000,
              "accn": "0001633917-19-000180",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-25"
            },
            {
              "end": "2018-12-31",
              "val": 63000000,
              "accn": "0001633917-19-000200",
              "fy": 2018,
              "fp": "FY",
              "form": "8-K",
              "filed": "2019-09-16"
            },
            {
              "end": "2018-12-31",
              "val": 63000000,
              "accn": "0001633917-19-000210",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24"
            },
            {
              "end": "2018-12-31",
              "val": 63000000,
              "accn": "0001633917-20-000028",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-06",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueInFourYears": {
        "label": "Operating Leases, Future Minimum Payments, Due in Four Years",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2015-12-31",
              "val": 38000000,
              "accn": "0001633917-16-000113",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-11",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 63000000,
              "accn": "0001633917-17-000027",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-08",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 62000000,
              "accn": "0001633917-18-000029",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-07",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 81000000,
              "accn": "0001633917-19-000043",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-07"
            },
            {
              "end": "2018-12-31",
              "val": 81000000,
              "accn": "0001633917-19-000118",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-25"
            },
            {
              "end": "2018-12-31",
              "val": 81000000,
              "accn": "0001633917-19-000180",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-25"
            },
            {
              "end": "2018-12-31",
              "val": 81000000,
              "accn": "0001633917-19-000200",
              "fy": 2018,
              "fp": "FY",
              "form": "8-K",
              "filed": "2019-09-16"
            },
            {
              "end": "2018-12-31",
              "val": 81000000,
              "accn": "0001633917-19-000210",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24"
            },
            {
              "end": "2018-12-31",
              "val": 81000000,
              "accn": "0001633917-20-000028",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-06",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueInThreeYears": {
        "label": "Operating Leases, Future Minimum Payments, Due in Three Years",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2015-12-31",
              "val": 49000000,
              "accn": "0001633917-16-000113",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-11",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 93000000,
              "accn": "0001633917-17-000027",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-08",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 82000000,
              "accn": "0001633917-18-000029",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-07",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 96000000,
              "accn": "0001633917-19-000043",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-07"
            },
            {
              "end": "2018-12-31",
              "val": 96000000,
              "accn": "0001633917-19-000118",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-25"
            },
            {
              "end": "2018-12-31",
              "val": 96000000,
              "accn": "0001633917-19-000180",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-25"
            },
            {
              "end": "2018-12-31",
              "val": 96000000,
              "accn": "0001633917-19-000200",
              "fy": 2018,
              "fp": "FY",
              "form": "8-K",
              "filed": "2019-09-16"
            },
            {
              "end": "2018-12-31",
              "val": 96000000,
              "accn": "0001633917-19-000210",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24"
            },
            {
              "end": "2018-12-31",
              "val": 96000000,
              "accn": "0001633917-20-000028",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-06",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueInTwoYears": {
        "label": "Operating Leases, Future Minimum Payments, Due in Two Years",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2015-12-31",
              "val": 51000000,
              "accn": "0001633917-16-000113",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-11",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 106000000,
              "accn": "0001633917-17-000027",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-08",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 112000000,
              "accn": "0001633917-18-000029",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-07",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 111000000,
              "accn": "0001633917-19-000043",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-07"
            },
            {
              "end": "2018-12-31",
              "val": 111000000,
              "accn": "0001633917-19-000118",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-25"
            },
            {
              "end": "2018-12-31",
              "val": 111000000,
              "accn": "0001633917-19-000180",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-25"
            },
            {
              "end": "2018-12-31",
              "val": 111000000,
              "accn": "0001633917-19-000200",
              "fy": 2018,
              "fp": "FY",
              "form": "8-K",
              "filed": "2019-09-16"
            },
            {
              "end": "2018-12-31",
              "val": 111000000,
              "accn": "0001633917-19-000210",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24"
            },
            {
              "end": "2018-12-31",
              "val": 111000000,
              "accn": "0001633917-20-000028",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-06",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeasesFutureMinimumPaymentsDueThereafter": {
        "label": "Operating Leases, Future Minimum Payments, Due Thereafter",
        "description": "Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.",
        "units": {
          "USD": [
            {
              "end": "2015-12-31",
              "val": 129000000,
              "accn": "0001633917-16-000113",
              "fy": 2015,
              "fp": "FY",
              "form": "10-K",
              "filed": "2016-02-11",
              "frame": "CY2015Q4I"
            },
            {
              "end": "2016-12-31",
              "val": 141000000,
              "accn": "0001633917-17-000027",
              "fy": 2016,
              "fp": "FY",
              "form": "10-K",
              "filed": "2017-02-08",
              "frame": "CY2016Q4I"
            },
            {
              "end": "2017-12-31",
              "val": 130000000,
              "accn": "0001633917-18-000029",
              "fy": 2017,
              "fp": "FY",
              "form": "10-K",
              "filed": "2018-02-07",
              "frame": "CY2017Q4I"
            },
            {
              "end": "2018-12-31",
              "val": 189000000,
              "accn": "0001633917-19-000043",
              "fy": 2018,
              "fp": "FY",
              "form": "10-K",
              "filed": "2019-02-07"
            },
            {
              "end": "2018-12-31",
              "val": 189000000,
              "accn": "0001633917-19-000118",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-25"
            },
            {
              "end": "2018-12-31",
              "val": 189000000,
              "accn": "0001633917-19-000180",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-25"
            },
            {
              "end": "2018-12-31",
              "val": 189000000,
              "accn": "0001633917-19-000200",
              "fy": 2018,
              "fp": "FY",
              "form": "8-K",
              "filed": "2019-09-16"
            },
            {
              "end": "2018-12-31",
              "val": 189000000,
              "accn": "0001633917-19-000210",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24"
            },
            {
              "end": "2018-12-31",
              "val": 189000000,
              "accn": "0001633917-20-000028",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-06",
              "frame": "CY2018Q4I"
            }
          ]
        }
      },
      "OperatingLeaseWeightedAverageDiscountRatePercent": {
        "label": "Operating Lease, Weighted Average Discount Rate, Percent",
        "description": "Weighted average discount rate for operating lease calculated at point in time.",
        "units": {
          "pure": [
            {
              "end": "2019-03-31",
              "val": 0.04,
              "accn": "0001633917-19-000118",
              "fy": 2019,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2019-04-25",
              "frame": "CY2019Q1I"
            },
            {
              "end": "2019-06-30",
              "val": 0.05,
              "accn": "0001633917-19-000180",
              "fy": 2019,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2019-07-25",
              "frame": "CY2019Q2I"
            },
            {
              "end": "2019-09-30",
              "val": 0.05,
              "accn": "0001633917-19-000210",
              "fy": 2019,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2019-10-24",
              "frame": "CY2019Q3I"
            },
            {
              "end": "2019-12-31",
              "val": 0.05,
              "accn": "0001633917-20-000028",
              "fy": 2019,
              "fp": "FY",
              "form": "10-K",
              "filed": "2020-02-06"
            },
            {
              "end": "2019-12-31",
              "val": 0.05,
              "accn": "0001633917-20-000093",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-05-07"
            },
            {
              "end": "2019-12-31",
              "val": 0.05,
              "accn": "0001633917-20-000134",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-07-30"
            },
            {
              "end": "2019-12-31",
              "val": 0.05,
              "accn": "0001633917-20-000169",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-11-03"
            },
            {
              "end": "2019-12-31",
              "val": 0.05,
              "accn": "0001633917-21-000018",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-05",
              "frame": "CY2019Q4I"
            },
            {
              "end": "2020-03-31",
              "val": 0.04,
              "accn": "0001633917-20-000093",
              "fy": 2020,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2020-05-07",
              "frame": "CY2020Q1I"
            },
            {
              "end": "2020-06-30",
              "val": 0.04,
              "accn": "0001633917-20-000134",
              "fy": 2020,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2020-07-30",
              "frame": "CY2020Q2I"
            },
            {
              "end": "2020-09-30",
              "val": 0.04,
              "accn": "0001633917-20-000169",
              "fy": 2020,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2020-11-03",
              "frame": "CY2020Q3I"
            },
            {
              "end": "2020-12-31",
              "val": 0.03,
              "accn": "0001633917-21-000018",
              "fy": 2020,
              "fp": "FY",
              "form": "10-K",
              "filed": "2021-02-05"
            },
            {
              "end": "2020-12-31",
              "val": 0.03,
              "accn": "0001633917-21-000100",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
              "filed": "2021-05-06"
            },
            {
              "end": "2020-12-31",
              "val": 0.03,
              "accn": "0001633917-21-000149",
              "fy": 2021,
              "fp": "Q2",
              "form": "10-Q",
              "filed": "2021-07-29"
            },
            {
              "end": "2020-12-31",
              "val": 0.03,
              "accn": "0001633917-21-000169",
              "fy": 2021,
              "fp": "Q3",
              "form": "10-Q",
              "filed": "2021-11-09"
            },
            {
              "end": "2020-12-31",
              "val": 0.03,
              "accn": "0001633917-22-000027",
              "fy": 2021,
              "fp": "FY",
              "form": "10-K",
              "filed": "2022-02-03",
              "frame": "CY2020Q4I"
            },
            {
              "end": "2021-03-31",
              "val": 0.03,
              "accn": "0001633917-21-000100",
              "fy": 2021,
              "fp": "Q1",
              "form": "10-Q",
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        "description": "Amount of gain (loss) from sale and disposal of integrated set of activities and assets capable of being conducted and managed for purpose of providing return in form of dividend, lower cost, or other economic benefit to investor, owner, member and participant.",
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