Derivative Financial Instruments - Notional Value of Derivative Contracts (Detail) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Total	$ 1,512,999	$ 1,395,345
Interest rate contracts
Derivative [Line Items]
Total	189,748	246,092
Futures and forwards
Derivative [Line Items]
Total	35,879	44,686
Swaps
Derivative [Line Items]
Total	137,552	177,876
Options written
Derivative [Line Items]
Total	8,207	10,842
Options purchased
Derivative [Line Items]
Total	8,110	12,688
Foreign exchange contracts
Derivative [Line Items]
Total	1,234,846	1,063,299
Swaps, futures and forwards
Derivative [Line Items]
Total	1,128,497	974,725
Options written
Derivative [Line Items]
Total	25,859	28,577
Options purchased
Derivative [Line Items]
Total	26,256	28,678
Spot
Derivative [Line Items]
Total	54,234	31,319
Total commodities, equities and precious metals
Derivative [Line Items]
Total	75,703	77,727
Swaps, futures and forwards
Derivative [Line Items]
Total	64,174	60,054
Options written
Derivative [Line Items]
Total	2,113	5,873
Options purchased
Derivative [Line Items]
Total	9,416	11,800
Credit derivatives
Derivative [Line Items]
Total	11,619	7,023
Other Contracts
Derivative [Line Items]
Total	$ 1,083	$ 1,204