Future Policy Benefits - Schedule of Balances and Changes in the Deferred Profit Liability (Details) - USD ($) $ in Millions |
9 Months Ended | 12 Months Ended | |
|---|---|---|---|
Sep. 30, 2026 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Immediate annuities | |||
| Deferred Profit Liability Activity | |||
| Balance, beginning of year | $ 90 | $ 90 | |
| Effect of actual variances from expected experience | (11) | $ 2 | |
| Balance adjusted for variances from expectation | 79 | 92 | |
| Issuances | 13 | 6 | |
| Interest accrual | 1 | 1 | |
| Amortization | (6) | (9) | |
| Balance, end of period | 87 | 90 | |
| Effect of actual variances from expected experience | (11) | 2 | |
| PRT | |||
| Deferred Profit Liability Activity | |||
| Balance, beginning of year | 7 | 6 | |
| Effect of actual variances from expected experience | 3 | 1 | |
| Balance adjusted for variances from expectation | 10 | 7 | |
| Issuances | 1 | 1 | |
| Interest accrual | 1 | 0 | |
| Amortization | 0 | (1) | |
| Balance, end of period | $ 12 | 7 | |
| Effect of actual variances from expected experience | $ 3 | $ 1 |