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Long-duration Contracts - Reconciliation of Future Policy Benefits (Details) - USD ($) $ in Millions | Jun. 30, 2023 | Dec. 31, 2022 | Jun. 30, 2022
--- | --- | --- | ---
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits | $ 50,284 | $ 42,110 | $ 41,199
Payout annuities with life contingencies |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits | 44,469 |  | 35,297
Reconciling items |  |  |
Liability for Future Policy Benefit, Activity [Line Items] |  |  |
Future policy benefits | $ 5,815 |  | $ 5,902

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