Trading Assets and Liabilities - Summary of Market Making Revenues by Major Product Type (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Trading activity, gains and losses, net [Line Items]
Market making	$ 7,637	$ 4,733	$ 13,098	$ 10,456
Interest rates
Trading activity, gains and losses, net [Line Items]
Market making	675	3,621	(1,830)	8,031
Credit
Trading activity, gains and losses, net [Line Items]
Market making	10	135	792	253
Currencies
Trading activity, gains and losses, net [Line Items]
Market making	1,954	(2,238)	3,877	(4,710)
Equities
Trading activity, gains and losses, net [Line Items]
Market making	4,537	3,078	8,325	6,020
Commodities
Trading activity, gains and losses, net [Line Items]
Market making	$ 461	$ 137	$ 1,934	$ 862

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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