Investments - Investment Gains (Losses) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Fixed maturity securities: | ||||
| Investment gains (losses) | $ (5) | $ (46) | $ (23) | $ (55) |
| Nonredeemable Preferred Stock | ||||
| Fixed maturity securities: | ||||
| Investment gains (losses) | 2 | 6 | (3) | 4 |
| Fixed maturity securities | ||||
| Fixed maturity securities: | ||||
| Gross gains | 19 | 5 | 25 | 18 |
| Gross losses | (27) | (53) | (47) | (75) |
| Investment gains (losses) | (8) | (48) | (22) | (57) |
| Equity securities | ||||
| Fixed maturity securities: | ||||
| Investment gains (losses) | 3 | 6 | (1) | 6 |
| Short-term investments and other | ||||
| Fixed maturity securities: | ||||
| Investment gains (losses) | $ (4) | $ (4) | ||