Investments (Components of Net 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 |
|
| Net Investment Gains (Losses) [Line Items] | ||||
| Net investment gains (losses) | $ (6) | $ (39) | $ (58) | $ (122) |
| Fixed maturity securities | ||||
| Net Investment Gains (Losses) [Line Items] | ||||
| Net investment gains (losses) | (5) | (23) | (44) | (57) |
| Equity securities | ||||
| Net Investment Gains (Losses) [Line Items] | ||||
| Net investment gains (losses) | 8 | 3 | 6 | 0 |
| Mortgage loans | ||||
| Net Investment Gains (Losses) [Line Items] | ||||
| Net investment gains (losses) | (10) | (24) | (20) | (67) |
| Limited partnerships and LLCs | ||||
| Net Investment Gains (Losses) [Line Items] | ||||
| Net investment gains (losses) | 1 | 1 | 1 | 0 |
| Other | ||||
| Net Investment Gains (Losses) [Line Items] | ||||
| Net investment gains (losses) | $ 0 | $ 4 | $ (1) | $ 2 |