Other Assets - Carrying Value of Goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Schedule Of Intangible Assets And Goodwill [Line Items]
Goodwill	$ 6,374	$ 4,285
Investment banking
Schedule Of Intangible Assets And Goodwill [Line Items]
Goodwill	267	267
FICC
Schedule Of Intangible Assets And Goodwill [Line Items]
Goodwill	269	269
Equities
Schedule Of Intangible Assets And Goodwill [Line Items]
Goodwill	2,647	2,647
Goodwill reassigned during period	9
Asset management
Schedule Of Intangible Assets And Goodwill [Line Items]
Goodwill	1,385	349
Wealth management
Schedule Of Intangible Assets And Goodwill [Line Items]
Goodwill	1,310	718
Consumer platforms
Schedule Of Intangible Assets And Goodwill [Line Items]
Goodwill	482	21
Transaction banking and other
Schedule Of Intangible Assets And Goodwill [Line Items]
Goodwill	14	$ 14
Goodwill reassigned during period	$ 14