Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue
Investment banking fees		$ 9,486	$ 7,501	$ 7,550
Principal transactions		18,021	14,018	12,059
Lending- and deposit-related fees	[1]	6,511	6,626	6,377
Asset management, administration and commissions	[1]	18,177	16,908	16,793
Investment securities gains/(losses)		802	258	(395)
Mortgage fees and related income		3,091	2,036	1,254
Card income	[2]	4,435	5,076	4,743
Other income		4,457	5,731	5,343
Noninterest revenue		64,980	58,154	53,724
Interest income		64,523	84,040	76,100
Interest expense		9,960	26,795	21,041
Net interest income		54,563	57,245	55,059
Total net revenue		119,543	115,399	108,783
Provision for credit losses		17,480	5,585	4,871
Noninterest expense
Compensation expense		34,988	34,155	33,117
Occupancy expense		4,449	4,322	3,952
Technology, communications and equipment expense		10,338	9,821	8,802
Professional and outside services		8,464	8,533	8,502
Marketing	[2]	2,476	3,351	3,044
Other expense		5,941	5,087	5,731
Total noninterest expense		66,656	65,269	63,148
Income before income tax expense		35,407	44,545	40,764
Income tax expense		6,276	8,114	8,290
Net income		29,131	36,431	32,474
Net income applicable to common stockholders		$ 27,410	$ 34,642	$ 30,709
Net income per common share data
Basic earnings per share (in dollars per share)		$ 8.89	$ 10.75	$ 9.04
Diluted earnings per share (in dollars per share)		$ 8.88	$ 10.72	$ 9.00
Weighted-average basic shares (in shares)		3,082.4	3,221.5	3,396.4
Weighted-average diluted shares (in shares)		3,087.4	3,230.4	3,414.0

[1] In the first quarter of 2020, the Firm reclassified certain fees from asset management, administration and commissions to lending- and deposit-related fees. Prior-period amounts have been revised to conform with the current presentation.

[2] In the second quarter of 2020, the Firm reclassified certain spend-based credit card reward costs from marketing expense to be a reduction of card income, with no effect on net income. Prior-period amounts have been revised to conform with the current presentation.