Collateralized Agreements and Financings - Other Secured Financings (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Other Secured Financings [Line Items]
Other secured financings (short-term): At fair value	$ 7,184	$ 8,979
Other secured financings (short-term): At amortized cost	735	191
Other secured financings (long-term): At fair value	7,056	8,095
Other secured financings (long-term): At amortized cost	620	1,279
Total other secured financings	15,595	18,544
Other secured financings collateralized by: Financial instruments	9,653	12,824
Other secured financings collateralized by: Other assets	5,942	5,720
U.S. Dollar
Other Secured Financings [Line Items]
Other secured financings (short-term): At fair value	4,983	5,315
Other secured financings (short-term): At amortized cost	583	0
Other secured financings (long-term): At fair value	4,470	4,170
Other secured financings (long-term): At amortized cost	261	827
Total other secured financings	10,297	10,312
Other secured financings collateralized by: Financial instruments	5,381	5,990
Other secured financings collateralized by: Other assets	4,916	4,322
Non-U.S. Dollar
Other Secured Financings [Line Items]
Other secured financings (short-term): At fair value	2,201	3,664
Other secured financings (short-term): At amortized cost	152	191
Other secured financings (long-term): At fair value	2,586	3,925
Other secured financings (long-term): At amortized cost	359	452
Total other secured financings	5,298	8,232
Other secured financings collateralized by: Financial instruments	4,272	6,834
Other secured financings collateralized by: Other assets	$ 1,026	$ 1,398