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Trading Assets and Liabilities - Summary of Market Making Revenues by Major Product Type (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Trading activity, gains and losses, net [Line Items]        
Market making $ 3,868 $ 4,127 $ 14,324 $ 14,557
Interest rates        
Trading activity, gains and losses, net [Line Items]        
Market making 407 4,527 8,438 4,869
Credit        
Trading activity, gains and losses, net [Line Items]        
Market making 19 116 272 1,877
Currencies        
Trading activity, gains and losses, net [Line Items]        
Market making 697 (2,258) (4,013) 1,615
Equities        
Trading activity, gains and losses, net [Line Items]        
Market making 1,947 1,639 7,967 5,053
Commodities        
Trading activity, gains and losses, net [Line Items]        
Market making $ 798 $ 103 $ 1,660 $ 1,143