Supplemental Cash Flow Information - Schedule of Activities Resulting from Management of Proceeds (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Net change in proceeds managed | ||
| Net change in fixed income securities | $ (566) | $ (204) |
| Net change in short-term investments | 442 | 327 |
| Operating cash flow (used) provided | (124) | 123 |
| Net change in cash | (1) | 0 |
| Net change in proceeds managed | (125) | 123 |
| Net change in liabilities | ||
| Liabilities for collateral, beginning of period | (1,934) | (2,041) |
| Liabilities for collateral, end of period | (2,059) | (1,918) |
| Operating cash flow provided (used) | $ 125 | $ (123) |