Trading Assets and Liabilities - Summary of Market Making Revenues by Major Product Type (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Trading activity, gains and losses, net [Line Items]
Market making	$ 4,642	$ 3,929	$ 15,561	$ 13,096
Interest rates
Trading activity, gains and losses, net [Line Items]
Market making	(3,043)	(1,249)	(7,705)	(1,572)
Credit
Trading activity, gains and losses, net [Line Items]
Market making	(286)	162	1,380	1,324
Currencies
Trading activity, gains and losses, net [Line Items]
Market making	5,769	1,779	13,997	4,521
Equities
Trading activity, gains and losses, net [Line Items]
Market making	1,464	2,521	6,064	6,839
Commodities
Trading activity, gains and losses, net [Line Items]
Market making	$ 738	$ 716	$ 1,825	$ 1,984