Derivative Financial Instruments - Notional Value of Derivative Contracts (Detail) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Total	$ 1,463,311	$ 1,395,345
Interest rate contracts
Derivative [Line Items]
Total	245,543	246,092
Futures and forwards
Derivative [Line Items]
Total	84,163	44,686
Swaps
Derivative [Line Items]
Total	144,554	177,876
Options written
Derivative [Line Items]
Total	8,461	10,842
Options purchased
Derivative [Line Items]
Total	8,365	12,688
Foreign exchange contracts
Derivative [Line Items]
Total	1,117,802	1,063,299
Swaps, futures and forwards
Derivative [Line Items]
Total	1,005,887	974,725
Options written
Derivative [Line Items]
Total	28,700	28,577
Options purchased
Derivative [Line Items]
Total	29,281	28,678
Spot
Derivative [Line Items]
Total	53,934	31,319
Total commodities, equities and precious metals
Derivative [Line Items]
Total	83,487	77,727
Swaps, futures and forwards
Derivative [Line Items]
Total	72,161	60,054
Options written
Derivative [Line Items]
Total	2,222	5,873
Options purchased
Derivative [Line Items]
Total	9,104	11,800
Credit contracts
Derivative [Line Items]
Total	15,250	7,023
Other Contracts
Derivative [Line Items]
Total	$ 1,229	$ 1,204