Deferred Policy Acquisition Costs, Value of Business Acquired and Other Intangibles (Unearned Revenue) (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
|
| Universal Life Insurance | ||
| Deferred Revenue Arrangement [Line Items] | ||
| Balance, beginning of period | $ 360 | $ 357 |
| Capitalization | 9 | 11 |
| Amortization | (9) | (9) |
| Balance, end of period | 360 | 359 |
| ULSG | ||
| Deferred Revenue Arrangement [Line Items] | ||
| Balance, beginning of period | 793 | 715 |
| Capitalization | 35 | 39 |
| Amortization | (20) | (18) |
| Balance, end of period | 808 | 736 |
| Variable Annuities | ||
| Deferred Revenue Arrangement [Line Items] | ||
| Balance, beginning of period | 54 | 60 |
| Capitalization | 0 | 0 |
| Amortization | (2) | (2) |
| Balance, end of period | $ 52 | $ 58 |