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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, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Gain (Loss) on Securities [Line Items] |  |  |  |
Realized gains (losses) on investments sold or disposed | $ (145) | $ (195) | $ (446) | $ (330)
Impairment (losses) | 2 | 0 | 7 | 0
Change in ACL recognized in earnings | (272) | (35) | (431) | (81)
Unrealized net gains (losses) recognized in earnings | 59 | (15) | 73 | 17
Total recognized gains (losses) | (213) | (50) | (358) | (64)
Non-investment portfolio gains (losses) | 87 | (176) | 151 | (402)
Net investment gains (losses) | $ (273) | (421) | (660) | (796)
Private Equity Funds |  |  |  |
Gain (Loss) on Securities [Line Items] |  |  |  |
Realized gains (losses) on investments sold or disposed |  | 3 | 2 | 46
Portfolio of investments, amount sold |  | 57 | 43 | 798
Proceeds from sale of equity method investment |  | $ 54 | $ 41 | $ 752

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