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Collateralized Agreements and Financings - Other Secured Financings (Detail) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Other Secured Financings [Line Items]    
Other secured financings (short-term) $ 16,064 $ 20,915
Other secured financings (long-term) 8,720 7,235
Total other secured financings 24,784 28,150
Other secured financings collateralized by: Financial instruments 22,314 25,738
Other secured financings collateralized by: Other assets 2,470 2,412
Other secured financings at fair value 24,595 27,985
U.S. Dollar    
Other Secured Financings [Line Items]    
Other secured financings (short-term) 10,724 16,333
Other secured financings (long-term) 1,896 1,377
Total other secured financings 12,620 17,710
Other secured financings collateralized by: Financial instruments 12,355 17,094
Other secured financings collateralized by: Other assets 265 616
Non-U.S. Dollar    
Other Secured Financings [Line Items]    
Other secured financings (short-term) 5,340 4,582
Other secured financings (long-term) 6,824 5,858
Total other secured financings 12,164 10,440
Other secured financings collateralized by: Financial instruments 9,959 8,644
Other secured financings collateralized by: Other assets $ 2,205 $ 1,796