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Income Taxes - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Operating Loss Carryforwards [Line Items] |  |  |
Valuation allowance related to certain tax attribute carryforward | $ 300 |  |
Valuation allowance | 1,650 | $ 1,746 |
Deferred tax asset, increase (decrease) in valuation allowance recognized | (31) |  |
Unrecognized tax benefits, if recognized would favorably affect the effective tax rate | 1,400 | 1,400 | $ 1,200
Unrecognized tax benefits, interest and penalties accrued | 53 | 52 | 63
Accrued expense (benefit) for the payment of interest and penalties | 1 | $ (11) | $ (2)
U.S. And Non-U.S. Life Insurance Companies, Available-for-Sale Portfolio |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Valuation allowance | 509 |  |
Non U.S.. Life Insurance Companies, Available-for-Sale Portfolio |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Deferred tax asset, increase (decrease) in valuation allowance recognized | $ (41) |  |

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