Offsetting Arrangements - Narrative (Details) - USD ($) $ in Millions |
Sep. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Offsetting [Abstract] | ||
| Fair value of securities received as collateral that can be resold or repledged | $ 15,350 | $ 11,410 |
| Fair value of securities received as collateral that have been resold or repledged | $ 10,390 | $ 2,760 |