Collateralized Agreements and Offsetting Arrangements - Collateral in the Form of Securities Pledged (Details) - Asset Pledged as Collateral - USD ($) $ in Millions |
Sep. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Collateral in the Form of Securities Pledged [Line Items] | ||
| Financial Instruments, Owned, at Fair Value | $ 10,677 | $ 9,559 |
| Trading securities | ||
| Collateral in the Form of Securities Pledged [Line Items] | ||
| Financial Instruments, Owned, at Fair Value | 10,428 | 9,559 |
| Other assets | ||
| Collateral in the Form of Securities Pledged [Line Items] | ||
| Financial Instruments, Owned, at Fair Value | $ 249 | $ 0 |