Investments (Loan Valuation Allowance for Mortgage Loans) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Allowance For Loan And Lease Losses Roll Forward | ||||
| Balance, Beginning of Period | $ 127 | $ 107 | $ 117 | $ 93 |
| Provision (release) | 0 | 0 | (7) | 0 |
| Balance, End of Period | 142 | 113 | 142 | 113 |
| Allowance For Loan and Lease Losses Provision Of Credit Losses | $ 15 | $ 6 | $ 32 | $ 20 |