Business Segments - Segment Operating Results (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) Segment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting [Abstract]
Number of business segments | Segment	3
Segment Reporting Information [Line Items]
Non-interest revenues	$ 39,687	$ 52,869	$ 39,809
Net interest income	7,678	6,470	4,751
Total net revenues	47,365	59,339	44,560
Provision for credit losses	2,715	357	3,098
Operating expenses	31,164	31,938	28,983
Pre-tax earnings	13,486	27,044	12,479
Net earnings	11,261	21,635	9,459
Net earnings to common	10,764	21,151	8,915
Average common equity	$ 105,287	$ 91,829	$ 80,576
Return on average common equity	10.20%	23.00%	11.10%
Net provisions for litigation and regulatory proceedings	$ 576	$ 534	$ 3,420
Global Banking & Markets
Segment Reporting Information [Line Items]
Non-interest revenues	30,042	34,079	28,285
Net interest income	2,445	2,655	2,184
Total net revenues	32,487	36,734	30,469
Provision for credit losses	468	(171)	1,216
Operating expenses	17,851	19,542	18,884
Pre-tax earnings	14,168	17,363	10,369
Net earnings	11,830	13,890	7,860
Net earnings to common	11,458	13,535	7,428
Average common equity	$ 69,951	$ 60,064	$ 54,749
Return on average common equity	16.40%	22.50%	13.60%
Asset & Wealth Management
Segment Reporting Information [Line Items]
Non-interest revenues	$ 9,843	$ 18,922	$ 11,541
Net interest income	3,533	3,043	2,216
Total net revenues	13,376	21,965	13,757
Provision for credit losses	519	(169)	1,395
Operating expenses	11,550	11,406	9,469
Pre-tax earnings	1,307	10,728	2,893
Net earnings	1,092	8,582	2,193
Net earnings to common	979	8,459	2,083
Average common equity	$ 31,762	$ 29,988	$ 24,963
Return on average common equity	3.10%	28.20%	8.30%
Platform Solutions
Segment Reporting Information [Line Items]
Non-interest revenues	$ (198)	$ (132)	$ (17)
Net interest income	1,700	772	351
Total net revenues	1,502	640	334
Provision for credit losses	1,728	697	487
Operating expenses	1,763	990	630
Pre-tax earnings	(1,989)	(1,047)	(783)
Net earnings	(1,661)	(837)	(594)
Net earnings to common	(1,673)	(843)	(596)
Average common equity	$ 3,574	$ 1,777	$ 864
Return on average common equity	(46.80%)	(47.40%)	(69.00%)