Collateralized Agreements and Financings - Other Secured Financings (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Other Secured Financings [Line Items]
Other Secured Financings Short Term At Fair Value	$ 8,979	$ 13,218
Other Secured Financings Short Term At Amortized Cost	191	0
Other Secured Financings Long Term At Fair Value	8,095	10,908
Other Secured Financings Long Term At Amortized Cost	1,279	1,629
Total other secured financings	18,544	25,755
Other secured financings collateralized by financial instruments	12,824	16,909
Other secured financings collateralized by other assets	5,720	8,846
U.S. Dollar [Member]
Other Secured Financings [Line Items]
Other Secured Financings Short Term At Fair Value	5,315	6,371
Other Secured Financings Long Term At Fair Value	4,170	6,632
Other Secured Financings Long Term At Amortized Cost	827	914
Total other secured financings	10,312	13,917
Other secured financings collateralized by financial instruments	5,990	6,841
Other secured financings collateralized by other assets	4,322	7,076
Non-U.S. Dollar [Member]
Other Secured Financings [Line Items]
Other Secured Financings Short Term At Fair Value	3,664	6,847
Other Secured Financings Short Term At Amortized Cost	191	0
Other Secured Financings Long Term At Fair Value	3,925	4,276
Other Secured Financings Long Term At Amortized Cost	452	715
Total other secured financings	8,232	11,838
Other secured financings collateralized by financial instruments	6,834	10,068
Other secured financings collateralized by other assets	$ 1,398	$ 1,770