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Investments (Components of other-than-temporary impairment losses recognized in earnings) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Impairment losses (gains) recognized in earnings | $ 17 | $ 20 | $ 25 | $ 30
Corporate and other bonds |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Impairment losses (gains) recognized in earnings | 9 | 21 | 17 | 29
Asset-backed |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Impairment losses (gains) recognized in earnings | $ 8 | $ (1) | $ 8 | $ 1

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