Investments (Components of Net Investment Gains Losses - Transaction Type) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Gain (Loss) on Securities [Line Items] | ||||
| Realized gains (losses) on investments sold or disposed | $ (261) | $ (75) | $ (326) | $ (251) |
| Impairment (losses) | (50) | (2) | (169) | (5) |
| Change in allowance for credit loss recognized in earnings | (82) | (223) | (149) | (323) |
| Unrealized net gains (losses) recognized in earnings | (19) | 26 | (3) | 42 |
| Total recognized gains (losses) | (101) | (197) | (152) | (281) |
| Non-investment portfolio gains (losses) | 5 | (48) | 15 | (70) |
| Net investment gains (losses) | $ (407) | $ (322) | (632) | (607) |
| Private Equity Funds | ||||
| Gain (Loss) on Securities [Line Items] | ||||
| Realized gains (losses) on investments sold or disposed | 40 | 1 | ||
| Equity Method Investment, Amount Sold | 577 | 36 | ||
| Proceeds from Sale of Equity Method Investments | $ 537 | $ 35 | ||