Commitments and Guarantees - Contractual Amounts of Credit-Related Off-Balance Sheet Financial Instruments (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
|---|---|---|
| Commitments and Contingencies Disclosure [Abstract] | ||
| Unfunded credit facilities | $ 35,960 | $ 35,697 |
| Indemnified securities financing | 395,860 | 371,968 |
| Standby letters of credit | $ 455 | $ 569 |