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Business and Basis of Presentation (Liability for Future Policy Benefits-Benefits Reserve) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Jan. 01, 2021 | Dec. 31, 2020
--- | --- | --- | --- | --- | ---
Other businesses |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change | $ 1,716 | $ 1,921 | $ 2,623 |  |
Less: Reinsurance recoverable | 69 | 76 | 5 |  |
Total balance after reinsurance recoverable, EOP | 1,563 | 1,758 | 2,500 |  |
Institutional | Retirement Strategies |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance | 155,886 | 137,924 | 128,887 |  | $ 122,806
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change | 141,135 | 117,754 | 142,593 |  | 144,315
Less: Reinsurance recoverable | 5,539 | 0 | 0 |  |
Total balance after reinsurance recoverable, EOP | 64,250 | 65,135 | 74,129 |  |
Term Life | Individual Life |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance | 20,186 | 20,300 | 18,892 |  | 18,263
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change | 19,852 | 19,288 | 22,768 |  | 23,400
Less: Reinsurance recoverable | 744 | 708 | 532 |  |
Total balance after reinsurance recoverable, EOP | 7,834 | 7,298 | 9,266 |  |
Life Planner | International Businesses |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance | 80,385 | 82,358 | 88,008 |  | 89,820
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change | 79,822 | 78,639 | 109,562 |  | 117,484
Less: Reinsurance recoverable | 102 | 126 | 142 |  |
Total balance after reinsurance recoverable, EOP | 50,674 | 47,930 | 69,907 |  |
Gibraltar Life and Other | International Businesses |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance | 86,391 | 91,597 | 101,370 |  | 106,079
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change | 79,036 | 80,331 | 114,846 |  | 124,342
Less: Reinsurance recoverable | 202 | 203 | 279 |  |
Total balance after reinsurance recoverable, EOP | 52,473 | 51,317 | 76,753 |  |
Long - Term Care | Total Corporate and Other |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance | 12,742 | 11,901 | 11,328 |  | 11,456
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change | 12,139 | 10,685 | 15,810 |  | 17,365
Less: Reinsurance recoverable | 0 | 0 | 0 |  |
Total balance after reinsurance recoverable, EOP | $ 8,852 | $ 7,753 | $ 12,225 |  |
Benefit reserves |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance |  |  |  | $ 204,683 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change |  |  |  | 267,553 |
Less: Reinsurance recoverable |  |  |  | 1,279 |
Total balance after reinsurance recoverable, EOP |  |  |  | 266,274 |
Benefit reserves | Other businesses |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance |  |  |  | 6,625 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change |  |  |  | 12,006 |
Less: Reinsurance recoverable |  |  |  | 13 |
Total balance after reinsurance recoverable, EOP |  |  |  | 11,993 |
Benefit reserves | As Previously Reported |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance |  |  |  |  | 209,018
Benefit reserves | As Previously Reported | Other businesses |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance |  |  |  |  | 6,624
Benefit reserves | Effect Of Application Of Accounting Standards Update 2018-12, Changes In Cash Flow Assumptions And Other Activity |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  |  | (4,335) |
Benefit reserves | Effect Of Application Of Accounting Standards Update 2018-12, Changes In Cash Flow Assumptions And Other Activity | Other businesses |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  |  | 1 |
Benefit reserves | Effect Of Application Of Accounting Standards Update 2018-12, Cumulative Changes In Discount Rate Assumptions And Other Activity |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  |  | 62,870 |
Benefit reserves | Effect Of Application Of Accounting Standards Update 2018-12, Cumulative Changes In Discount Rate Assumptions And Other Activity | Other businesses |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  |  | 5,381 |
Benefit reserves | Institutional | Retirement Strategies |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance |  |  |  | 61,578 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change |  |  |  | 75,126 |
Less: Reinsurance recoverable |  |  |  | 0 |
Total balance after reinsurance recoverable, EOP |  |  |  | 75,126 |
Benefit reserves | Institutional | As Previously Reported | Retirement Strategies |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance |  |  |  |  | 65,383
Benefit reserves | Institutional | Effect Of Application Of Accounting Standards Update 2018-12, Changes In Cash Flow Assumptions And Other Activity | Retirement Strategies |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  |  | (3,805) |
Benefit reserves | Institutional | Effect Of Application Of Accounting Standards Update 2018-12, Cumulative Changes In Discount Rate Assumptions And Other Activity | Retirement Strategies |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  |  | 13,548 |
Benefit reserves | Term Life | Individual Life |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance |  |  |  | 7,887 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change |  |  |  | 10,549 |
Less: Reinsurance recoverable |  |  |  | 799 |
Total balance after reinsurance recoverable, EOP |  |  |  | 9,750 |
Benefit reserves | Term Life | As Previously Reported | Individual Life |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance |  |  |  |  | 7,887
Benefit reserves | Term Life | Effect Of Application Of Accounting Standards Update 2018-12, Changes In Cash Flow Assumptions And Other Activity | Individual Life |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  |  | 0 |
Benefit reserves | Term Life | Effect Of Application Of Accounting Standards Update 2018-12, Cumulative Changes In Discount Rate Assumptions And Other Activity | Individual Life |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  |  | 2,662 |
Benefit reserves | Life Planner | International Businesses |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance |  |  |  | 51,617 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change |  |  |  | 74,207 |
Less: Reinsurance recoverable |  |  |  | 160 |
Total balance after reinsurance recoverable, EOP |  |  |  | 74,047 |
Benefit reserves | Life Planner | As Previously Reported | International Businesses |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance |  |  |  |  | 51,607
Benefit reserves | Life Planner | Effect Of Application Of Accounting Standards Update 2018-12, Changes In Cash Flow Assumptions And Other Activity | International Businesses |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  |  | 10 |
Benefit reserves | Life Planner | Effect Of Application Of Accounting Standards Update 2018-12, Cumulative Changes In Discount Rate Assumptions And Other Activity | International Businesses |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  |  | 22,590 |
Benefit reserves | Gibraltar Life and Other | International Businesses |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance |  |  |  | 69,019 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change |  |  |  | 82,803 |
Less: Reinsurance recoverable |  |  |  | 307 |
Total balance after reinsurance recoverable, EOP |  |  |  | 82,496 |
Benefit reserves | Gibraltar Life and Other | As Previously Reported | International Businesses |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance |  |  |  |  | 69,542
Benefit reserves | Gibraltar Life and Other | Effect Of Application Of Accounting Standards Update 2018-12, Changes In Cash Flow Assumptions And Other Activity | International Businesses |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  |  | (523) |
Benefit reserves | Gibraltar Life and Other | Effect Of Application Of Accounting Standards Update 2018-12, Cumulative Changes In Discount Rate Assumptions And Other Activity | International Businesses |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  |  | 13,784 |
Benefit reserves | Long - Term Care | Total Corporate and Other |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance |  |  |  | 7,957 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change |  |  |  | 12,862 |
Less: Reinsurance recoverable |  |  |  | 0 |
Total balance after reinsurance recoverable, EOP |  |  |  | 12,862 |
Benefit reserves | Long - Term Care | As Previously Reported | Total Corporate and Other |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Original Discount Rate, before Cash Flow and Reinsurance |  |  |  |  | $ 7,975
Benefit reserves | Long - Term Care | Effect Of Application Of Accounting Standards Update 2018-12, Changes In Cash Flow Assumptions And Other Activity | Total Corporate and Other |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  |  | (18) |
Benefit reserves | Long - Term Care | Effect Of Application Of Accounting Standards Update 2018-12, Cumulative Changes In Discount Rate Assumptions And Other Activity | Total Corporate and Other |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  |  | $ 4,905 |

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