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Changes in LFPBs, ASU 2018-12 Transition (Details) - USD ($) $ in Millions | Mar. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2022 | Jan. 01, 2022 | Dec. 31, 2021 | Jan. 01, 2021 | Dec. 31, 2020
--- | --- | --- | --- | --- | --- | --- | ---
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |  |  |
Accumulated other comprehensive income (loss) | $ (5,288) | $ (6,106) | $ (2,541) |  | $ 47 |  |
Future policy benefits | 32,286 | 31,497 |  |  | 39,990 |  |
Previously Reported |  |  |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |  |  |
Accumulated other comprehensive income (loss) |  | (5,424) |  |  | 4,172 |  |
Future policy benefits |  | 41,569 |  |  | 43,807 |  |
Accounting Standards Update 2018-12 | Revision of Prior Period, Accounting Standards Update, Adjustment |  |  |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |  |  |
Accumulated other comprehensive income (loss) |  | (682) |  |  | (4,125) |  |
Future policy benefits |  | (10,072) |  |  | (3,817) |  |
Term and Whole Life Insurance |  |  |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance | 8,099 |  | 8,195 |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  | 0 |  | $ 157 | 0 | $ 70 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change | 5,359 | 5,279 | 5,996 |  | 6,426 |  | $ 6,852
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance | 43 | 45 | 61 |  | 64 |  |
Future policy benefits | $ 2,421 | $ 2,363 | $ 2,719 |  | $ 3,037 |  |
Term and Whole Life Insurance | Accounting Standards Update 2018-12 |  |  |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance |  |  |  |  |  | 3,404 |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  |  |  |  |  | 85 |
Future policy benefits |  |  |  |  |  | 3,319 |
Term and Whole Life Insurance | Accounting Standards Update 2018-12 | Previously Reported |  |  |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance |  |  |  |  |  |  | 2,854
Term and Whole Life Insurance | Accounting Standards Update 2018-12 | Revision of Prior Period, Accounting Standards Update, Adjustment |  |  |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |  |  |
Accumulated other comprehensive income (loss) |  |  |  |  |  | 0 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  |  |  |  | 14 |
Deferred Profit Liabilities |  |  |  |  |  | 0 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change |  |  |  |  |  | 536 |
Income Annuity [Domain] | Accounting Standards Update 2018-12 |  |  |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance |  |  |  |  |  | 4,867 |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  |  |  |  |  | 29 |
Future policy benefits |  |  |  |  |  | 4,838 |
Income Annuity [Domain] | Accounting Standards Update 2018-12 | Previously Reported |  |  |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance |  |  |  |  |  |  | 4,311
Income Annuity [Domain] | Accounting Standards Update 2018-12 | Revision of Prior Period, Accounting Standards Update, Adjustment |  |  |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |  |  |
Accumulated other comprehensive income (loss) |  |  |  |  |  | (203) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  |  |  |  | (171) |
Deferred Profit Liabilities |  |  |  |  |  | 176 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change |  |  |  |  |  | 754 |
Structured Settlement and Pension Risk Transfer Annuities [Domain] | Accounting Standards Update 2018-12 |  |  |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance |  |  |  |  |  | 11,518 |
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance |  |  |  |  |  | 102 |
Future policy benefits |  |  |  |  |  | 11,416 |
Structured Settlement and Pension Risk Transfer Annuities [Domain] | Accounting Standards Update 2018-12 | Previously Reported |  |  |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |  |  |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance |  |  |  |  |  |  | $ 10,115
Structured Settlement and Pension Risk Transfer Annuities [Domain] | Accounting Standards Update 2018-12 | Revision of Prior Period, Accounting Standards Update, Adjustment |  |  |  |  |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |  |  |  |  |
Accumulated other comprehensive income (loss) |  |  |  |  |  | (1,784) |
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change |  |  |  |  |  | 200 |
Deferred Profit Liabilities |  |  |  |  |  | 217 |
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change |  |  |  |  |  | $ 2,770 |

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