Investments - Schedule of Increase (Decrease) in Payables for Collateral on Investments (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Investments [Abstract] | |||
| Collateral payable for derivative investments | $ 1,963 | $ 1,966 | $ (2,291) |
| Securities pledged under securities lending agreements | (48) | (93) | 57 |
| Investments pledged for FHLBI | 0 | (480) | 0 |
| Total increase (decrease) in payables for collateral on investments | $ 1,915 | $ 1,393 | $ (2,234) |