Investments (Other Invested Assets) (Details) - USD ($) $ in Millions |
Sep. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Other Invested Assets [Line Items] | ||
| Other invested assets | $ 1,547 | $ 1,514 |
| Equity Release Mortgages [Member] | ||
| Other Invested Assets [Line Items] | ||
| Other invested assets | 1,296 | 1,197 |
| Derivatives | ||
| Other Invested Assets [Line Items] | ||
| Other invested assets | 134 | 185 |
| Other | ||
| Other Invested Assets [Line Items] | ||
| Other invested assets | 53 | 64 |
| Federal Home Loan Bank Certificates and Obligations (FHLB) | ||
| Other Invested Assets [Line Items] | ||
| Other invested assets | $ 64 | $ 68 |