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Investments (Components of Net Investment Gains Losses - Transaction Type) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract] |  |  |  |
Realized gains (losses) on investments sold or disposed | $ (445) | $ 434 | $ (656) | $ 437
Impairments | 5 | (13) | (35) | (13)
Change in allowance for credit loss recognized in earnings | 84 | (39) | (159) | (17)
Unrealized net gains (losses) recognized in earnings | (43) | 64 | (58) | 182
Total recognized gains (losses) | 41 | 25 | (217) | 165
Non-investment portfolio gains (losses) | (286) | 1,159 | (295) | 1,150
Net investment gains (losses) | $ (685) | $ 1,605 | $ (1,203) | $ 1,739

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