Future Policy Benefits - Schedule of Liability For Future Policy Benefit Expected Future Policy Benefit Undiscounted (Details) - USD ($) $ in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
|---|---|---|
| Traditional Life | ||
| Undiscounted | ||
| Expected future benefit payments | $ 2,458 | $ 2,720 |
| Expected future gross premiums | 821 | 923 |
| Discounted | ||
| Expected future benefit payments | 1,794 | 1,938 |
| Expected future gross premiums | 601 | 671 |
| Immediate annuities | ||
| Undiscounted | ||
| Expected future benefit payments | 3,082 | 3,168 |
| Expected future gross premiums | 0 | 0 |
| Discounted | ||
| Expected future benefit payments | 1,242 | 1,297 |
| Expected future gross premiums | 0 | 0 |
| PRT | ||
| Undiscounted | ||
| Expected future benefit payments | 13,431 | 10,535 |
| Expected future gross premiums | 0 | 0 |
| Discounted | ||
| Expected future benefit payments | 8,178 | 6,360 |
| Expected future gross premiums | $ 0 | $ 0 |