Investments - Schedule of Increase (Decrease) in Payables for Collateral on Investments (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Investments [Abstract] | |||
| Collateral payable for derivative investments | $ 739 | $ 1,942 | $ 1,917 |
| Securities pledged under securities lending agreements | (12) | (48) | (93) |
| Investments pledged for FHLB lending program | (2,650) | 0 | (480) |
| Total increase (decrease) in payables for collateral on investments | $ (1,923) | $ 1,894 | $ 1,344 |