Derivative Financial Instruments - Notional Value of Derivative Contracts (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Total	$ 1,301,082	$ 1,327,929
Interest rate contracts
Derivative [Line Items]
Total	122,702	162,919
Futures and forwards
Derivative [Line Items]
Total	5,143	30,764
Swaps
Derivative [Line Items]
Total	114,947	120,560
Options written
Derivative [Line Items]
Total	1,260	5,855
Options purchased
Derivative [Line Items]
Total	1,352	5,740
Foreign exchange contracts
Derivative [Line Items]
Total	1,096,967	1,075,651
Swaps, futures and forwards
Derivative [Line Items]
Total	1,005,683	968,847
Options written
Derivative [Line Items]
Total	30,755	39,969
Options purchased
Derivative [Line Items]
Total	30,898	40,026
Spot
Derivative [Line Items]
Total	29,631	26,809
Total commodities, equities and precious metals
Derivative [Line Items]
Total	63,287	69,703
Swaps, futures and forwards
Derivative [Line Items]
Total	53,110	58,371
Options written
Derivative [Line Items]
Total	1,713	1,643
Options purchased
Derivative [Line Items]
Total	8,464	9,689
Credit derivatives
Derivative [Line Items]
Total	16,710	18,547
Other Contracts
Derivative [Line Items]
Total	$ 1,416	$ 1,109