Derivative Financial Instruments - Notional Value of Derivative Contracts (Detail) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Derivative [Line Items]
Total	$ 1,484,673	$ 1,327,929
Interest rate contracts
Derivative [Line Items]
Total	213,680	162,919
Futures and forwards
Derivative [Line Items]
Total	93,443	30,764
Swaps
Derivative [Line Items]
Total	110,356	120,560
Options written
Derivative [Line Items]
Total	4,931	5,855
Options purchased
Derivative [Line Items]
Total	4,950	5,740
Foreign exchange contracts
Derivative [Line Items]
Total	1,183,362	1,075,651
Swaps, futures and forwards
Derivative [Line Items]
Total	1,077,478	968,847
Options written
Derivative [Line Items]
Total	32,605	39,969
Options purchased
Derivative [Line Items]
Total	32,824	40,026
Spot
Derivative [Line Items]
Total	40,455	26,809
Total commodities, equities and precious metals
Derivative [Line Items]
Total	74,148	69,703
Swaps, futures and forwards
Derivative [Line Items]
Total	62,370	58,371
Options written
Derivative [Line Items]
Total	1,844	1,643
Options purchased
Derivative [Line Items]
Total	9,934	9,689
Credit derivatives
Derivative [Line Items]
Total	12,190	18,547
Other Contracts
Derivative [Line Items]
Total	$ 1,293	$ 1,109