Collateralized Agreements and Financings - Other Secured Financings (Detail) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Other Secured Financings [Line Items]
Other secured financings (short-term)	$ 17,309	$ 20,915
Other secured financings (long-term)	10,712	7,235
Total other secured financings	28,021	28,150
Other secured financings collateralized by: Financial instruments	25,542	25,738
Other secured financings collateralized by: Other assets	2,479	2,412
Other secured financings at fair value	27,833	27,985
U.S. Dollar
Other Secured Financings [Line Items]
Other secured financings (short-term)	12,152	16,333
Other secured financings (long-term)	2,618	1,377
Total other secured financings	14,770	17,710
Other secured financings collateralized by: Financial instruments	14,461	17,094
Other secured financings collateralized by: Other assets	309	616
Non-U.S. Dollar
Other Secured Financings [Line Items]
Other secured financings (short-term)	5,157	4,582
Other secured financings (long-term)	8,094	5,858
Total other secured financings	13,251	10,440
Other secured financings collateralized by: Financial instruments	11,081	8,644
Other secured financings collateralized by: Other assets	$ 2,170	$ 1,796