v3.26.1
Segment, Geographic and Revenue Information - Institutional Securities - Investment Banking Revenues (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]        
Investment banking $ 2,651 $ 1,644 $ 4,940 $ 3,355
Firm Investment banking revenues from contracts with customers (as a percent) 90.00% 88.00% 89.00% 85.00%
Institutional Securities | Operating Segments        
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]        
Investment banking $ 2,437 $ 1,540 $ 4,553 $ 3,099
Institutional Securities | Operating Segments | Institutional Securities Advisory        
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]        
Investment banking 798 508 1,776 1,071
Institutional Securities | Operating Segments | Institutional Securities Underwriting        
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Product and Service, Revenue [Line Items]        
Investment banking $ 1,639 $ 1,032 $ 2,777 $ 2,028