Commitments and Contingencies - Investor Reserves Activity (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Investor Reserves | ||||
| Balance at beginning of period | $ 123 | $ 101 | $ 129 | $ 100 |
| (Benefit from) provision for investor reserves | (2) | (1) | 4 | 3 |
| Realized losses | (5) | (2) | (17) | (5) |
| Balance at end of period | $ 116 | $ 98 | $ 116 | $ 98 |