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Income Taxes - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Effective tax rates on income from continuing operations (as a percent) | 23.00% | 5.10% | 24.10% | 8.50% |
U.S. federal income tax at statutory rate (as a percent) | 21.00% | 21.00% | 21.00% | 21.00% |
Valuation allowance related to certain tax attribute carryforward | $ 300 |  | $ 300 |  |
Gross unrecognized tax benefits, beginning of year | 1,400 |  | 1,400 |  | $ 1,400
Unrecognized tax benefits, if recognized would favorably affect the effective tax rate | 1,400 |  | 1,400 |  | 1,400
Unrecognized tax benefits, interest and penalties accrued | 52 |  | 52 |  | $ 52
Unrecognized tax benefits, interest net of the federal (benefit) expense and penalties |  |  | 0 | $ 4 |
Foreign |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Deferred tax asset, increase (decrease) in valuation allowance recognized |  |  | (6) |  |
U.S. And Non-U.S. Life Insurance Companies, Available-for-Sale Portfolio |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Valuation allowance | 600 |  | 600 |  |
Non U.S.. Life Insurance Companies, Available-for-Sale Portfolio |  |  |  |  |
Operating Loss Carryforwards [Line Items] |  |  |  |  |
Deferred tax asset, increase (decrease) in valuation allowance recognized | $ 12 |  | $ 23 |  |

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