Reportable Operating Segments and Geographic Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total non-interest revenues	$ 42,967	$ 34,630	$ 28,102
Revenue from contracts with customers	34,219	27,716	21,974
Interest income	12,658	9,033	10,083
Interest expense	2,763	1,283	2,098
Total revenues net of interest expense	52,862	42,380	36,087
Pretax income (loss)	9,585	10,689	4,296
Total assets	228,354	188,548	191,000
Corporate and Other
Segment Reporting Information [Line Items]
Total non-interest revenues	(54)	26	(319)
Revenue from contracts with customers	(7)	172	(21)
Interest income	655	165	280
Interest expense	758	208	506
Total revenues net of interest expense	(157)	(17)	(545)
Pretax income (loss)	(2,227)	(1,008)	(1,635)
Total assets	26,000	19,000	49,000
USCS | Operating Segments
Segment Reporting Information [Line Items]
Total non-interest revenues	16,440	12,989	10,125
Revenue from contracts with customers	12,478	9,823	7,261
Interest income	8,457	6,328	7,009
Interest expense	983	395	787
Total revenues net of interest expense	23,914	18,922	16,347
Pretax income (loss)	5,400	5,958	3,103
Total assets	94,000	77,000	65,000
CS | Operating Segments
Segment Reporting Information [Line Items]
Total non-interest revenues	12,196	9,833	8,210
Revenue from contracts with customers	10,844	8,659	7,123
Interest income	2,070	1,408	1,532
Interest expense	697	330	508
Total revenues net of interest expense	13,569	10,911	9,234
Pretax income (loss)	2,880	2,936	1,013
Total assets	51,000	45,000	35,000
ICS | Operating Segments
Segment Reporting Information [Line Items]
Total non-interest revenues	8,262	6,761	5,877
Revenue from contracts with customers	5,301	4,368	3,663
Interest income	1,453	1,116	1,244
Interest expense	654	442	379
Total revenues net of interest expense	9,061	7,435	6,742
Pretax income (loss)	578	929	521
Total assets	37,000	33,000	28,000
GMNS | Operating Segments
Segment Reporting Information [Line Items]
Total non-interest revenues	6,123	5,021	4,209
Revenue from contracts with customers	5,603	4,694	3,948
Interest income	23	16	18
Interest expense	(329)	(92)	(82)
Total revenues net of interest expense	6,475	5,129	4,309
Pretax income (loss)	2,954	1,874	1,294
Total assets	$ 20,000	$ 15,000	$ 14,000