Derivative Financial Instruments - Notional Value of Derivative Contracts (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Derivative [Line Items]
Total	$ 1,518,906	$ 1,395,345
Interest rate contracts
Derivative [Line Items]
Total	213,512	246,092
Futures and forwards
Derivative [Line Items]
Total	28,309	44,686
Swaps
Derivative [Line Items]
Total	170,998	177,876
Options written
Derivative [Line Items]
Total	7,153	10,842
Options purchased
Derivative [Line Items]
Total	7,052	12,688
Foreign exchange contracts
Derivative [Line Items]
Total	1,208,586	1,063,299
Swaps, futures and forwards
Derivative [Line Items]
Total	1,079,910	974,725
Options written
Derivative [Line Items]
Total	38,904	28,577
Options purchased
Derivative [Line Items]
Total	38,906	28,678
Spot
Derivative [Line Items]
Total	50,866	31,319
Total commodities, equities and precious metals
Derivative [Line Items]
Total	81,649	77,727
Swaps, futures and forwards
Derivative [Line Items]
Total	70,629	60,054
Options written
Derivative [Line Items]
Total	1,684	5,873
Options purchased
Derivative [Line Items]
Total	9,336	11,800
Credit derivatives
Derivative [Line Items]
Total	14,182	7,023
Other Contracts
Derivative [Line Items]
Total	$ 977	$ 1,204