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Investments (Components of other-than-temporary impairment losses recognized in earnings) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items] |  |  |
Impairment losses (gains) recognized in earnings | $ 63 | $ 44 | $ 62
Corporate and other bonds |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Impairment losses (gains) recognized in earnings | 34 | 33 | 62
Asset-backed |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Impairment losses (gains) recognized in earnings | $ 29 | $ 11 | $ 0

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