Securities Financing Agreements, Short-term Borrowings, Collateral and Restricted Cash - Collateral (Details) - USD ($) $ in Trillions |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2026 |
Dec. 31, 2025 |
|
| Securities Financing Agreements, Collateral and Restricted Cash [Abstract] | ||
| Securities held as collateral, fair value | $ 1.1 | $ 1.1 |
| Securities received as collateral, amount re-pledged and sold | $ 1.1 | $ 1.0 |