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Transition- Balance of Changes in FPB due to Adoption of ASU 2018-012 (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Jan. 01, 2021 | Dec. 31, 2020
--- | --- | --- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Liability for future policy benefit |  |  |  |  | $ 4,128
Less: Reinsurance recoverable |  |  |  |  | 1,115
As adjusted |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Balance, net of reinsurance |  |  |  | $ 3,013 |
As Previously Reported |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Liability for future policy benefit |  |  |  |  | 4,005
Cumulative effect of retrospective adoption |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Liability for future policy benefit |  |  |  |  | (78)
Effect of remeasurement of liability at current discount rate (2) |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Liability for future policy benefit |  |  |  |  | 201
Immediate Annuities |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Liability for future policy benefit |  |  |  |  | 2,175
Less: Reinsurance recoverable | $ 204 | $ 218 | $ 293 |  | 322
Immediate Annuities | As adjusted |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Balance, net of reinsurance |  |  |  | 1,853 |
Immediate Annuities | As Previously Reported |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Liability for future policy benefit |  |  |  |  | 1,861
Traditional Life |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Liability for future policy benefit |  |  |  |  | 1,953
Less: Reinsurance recoverable | $ 510 | $ 515 | $ 670 |  | 793
Traditional Life | As adjusted |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Balance, net of reinsurance |  |  |  | $ 1,160 |
Traditional Life | As Previously Reported |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Liability for future policy benefit |  |  |  |  | 2,144
FIA | Cumulative effect of retrospective adoption |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Liability for future policy benefit |  |  |  |  | 201
FIA | Effect of remeasurement of liability at current discount rate (2) |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Liability for future policy benefit |  |  |  |  | 113
Fixed Rate Annuities | Cumulative effect of retrospective adoption |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Liability for future policy benefit |  |  |  |  | (279)
Fixed Rate Annuities | Effect of remeasurement of liability at current discount rate (2) |  |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |  |
Liability for future policy benefit |  |  |  |  | $ 88

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