Supplemental Cash Flow Information - Schedule of Activities Resulting from Management of Proceeds (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Net change in proceeds managed | ||
| Net change in fixed income securities | $ (204) | $ 80 |
| Net change in short-term investments | 327 | (190) |
| Operating cash flow provided (used) | 123 | (110) |
| Net change in liabilities | ||
| Liabilities for collateral, beginning of period | (2,041) | (1,891) |
| Liabilities for collateral, end of period | (1,918) | (2,001) |
| Operating cash flow (used) provided | $ (123) | $ 110 |