Derivative Financial Instruments - Notional Value of Derivative Contracts (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Derivative [Line Items]
Total	$ 1,307,707	$ 1,301,082
Interest rate contracts
Derivative [Line Items]
Total	123,726	122,702
Futures and forwards
Derivative [Line Items]
Total	16,829	5,143
Swaps
Derivative [Line Items]
Total	104,458	114,947
Options written
Derivative [Line Items]
Total	1,217	1,260
Options purchased
Derivative [Line Items]
Total	1,222	1,352
Foreign exchange contracts
Derivative [Line Items]
Total	1,118,248	1,096,967
Swaps, futures and forwards
Derivative [Line Items]
Total	1,026,047	1,005,683
Options written
Derivative [Line Items]
Total	29,739	30,755
Options purchased
Derivative [Line Items]
Total	29,859	30,898
Spot
Derivative [Line Items]
Total	32,603	29,631
Total commodities, equities and precious metals
Derivative [Line Items]
Total	44,888	63,287
Swaps, futures and forwards
Derivative [Line Items]
Total	33,520	53,110
Options written
Derivative [Line Items]
Total	1,513	1,713
Options purchased
Derivative [Line Items]
Total	9,855	8,464
Credit derivatives
Derivative [Line Items]
Total	19,175	16,710
Other Contracts
Derivative [Line Items]
Total	$ 1,670	$ 1,416