Business Segments - Assets by Segment (Detail) - USD ($) $ in Millions	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total	$ 1,555,994	$ 1,601,224	$ 1,463,988
Investment Banking
Segment Reporting Information [Line Items]
Total	145,563		144,157
Global Markets
Segment Reporting Information [Line Items]
Total	1,163,721		1,082,378
Asset Management
Segment Reporting Information [Line Items]
Total	85,814		91,115
Consumer & Wealth Management
Segment Reporting Information [Line Items]
Total	$ 160,896		$ 146,338