Investments - Gross realized gains and losses on available for sale fixed maturity investment transactions (Details) - Fixed maturities - USD ($) $ in Millions |
9 Months Ended | |
|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Gross realized gains and losses on the sale of available for sale fixed maturity and equity security investments | ||
| Gross gains | $ 3 | $ 4 |
| Gross losses | $ (6) | $ (13) |