Noninterest Revenue and Noninterest Expense - Principal Transactions (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Schedule of Noninterest revenue [Line Items] | ||||
| Total revenue by instrument type | $ 6,516 | $ 7,120 | $ 23,510 | $ 21,888 |
| Private equity losses | 0 | (11) | 0 | (16) |
| Principal transactions | 6,516 | 7,109 | 23,510 | 21,872 |
| Interest rate | ||||
| Schedule of Noninterest revenue [Line Items] | ||||
| Total revenue by instrument type | (142) | 1,303 | 1,733 | 3,645 |
| Credit | ||||
| Schedule of Noninterest revenue [Line Items] | ||||
| Total revenue by instrument type | 167 | 164 | 966 | 601 |
| Foreign exchange | ||||
| Schedule of Noninterest revenue [Line Items] | ||||
| Total revenue by instrument type | 1,459 | 1,186 | 4,410 | 4,158 |
| Equity | ||||
| Schedule of Noninterest revenue [Line Items] | ||||
| Total revenue by instrument type | 4,780 | 3,999 | 14,823 | 12,009 |
| Commodity | ||||
| Schedule of Noninterest revenue [Line Items] | ||||
| Total revenue by instrument type | $ 252 | $ 468 | $ 1,578 | $ 1,475 |