Segment, Geographic and Revenue Information - Institutional Securities - Investment Banking Revenues (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Revenue from External Customer [Line Items] | |||
| Investment banking | $ 8,199 | $ 6,705 | $ 4,948 |
| Firm Investment banking revenues from contracts with customers | 84.00% | 90.00% | 91.00% |
| IS | Operating Segments | |||
| Revenue from External Customer [Line Items] | |||
| Investment banking | $ 7,619 | $ 6,170 | $ 4,578 |
| IS | Operating Segments | Institutional Securities—Advisory | |||
| Revenue from External Customer [Line Items] | |||
| Investment banking | 2,888 | 2,378 | 2,244 |
| IS | Operating Segments | Institutional Securities—Underwriting | |||
| Revenue from External Customer [Line Items] | |||
| Investment banking | $ 4,731 | $ 3,792 | $ 2,334 |