Business Segments (Details) $ in Millions		3 Months Ended
		Mar. 31, 2021 USD ($) segment		Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)	[2]
Segment Reporting Information [Line Items]
Number of reportable segments | segment		4
Noninterest revenue		$ 19,377		$ 13,847
Net interest income		12,889		14,439
Total net revenue		32,266		28,286
Provision for credit losses		(4,156)		8,285
Noninterest expense		18,725		16,791
Income before income tax expense		17,697		3,210
Income tax expense/(benefit)	[1]	3,397		345
Net income		14,300		2,865
Average equity		245,542		234,530
Total assets		$ 3,689,336	[2]	$ 3,138,530	$ 3,384,757
ROE		23.00%		4.00%
Overhead ratio		58.00%		59.00%
Operating Segments | Consumer & Community Banking
Segment Reporting Information [Line Items]
Noninterest revenue		$ 4,588		$ 4,097
Net interest income		7,929		9,190
Total net revenue		12,517		13,287
Provision for credit losses		(3,602)		5,772
Noninterest expense		7,202		7,269
Income before income tax expense		8,917		246
Income tax expense/(benefit)		2,189		49
Net income		6,728		197
Average equity		50,000		52,000
Total assets		$ 487,978		$ 513,352
ROE		54.00%		1.00%
Overhead ratio		58.00%		55.00%
Operating Segments | Corporate & Investment Bank
Segment Reporting Information [Line Items]
Noninterest revenue		$ 11,088		$ 6,896
Net interest income		3,517		3,107
Total net revenue		14,605		10,003
Provision for credit losses		(331)		1,401
Noninterest expense		7,104		5,955
Income before income tax expense		7,832		2,647
Income tax expense/(benefit)		2,092		662
Net income		5,740		1,985
Average equity		83,000		80,000
Total assets		$ 1,355,123		$ 1,216,558
ROE		27.00%		9.00%
Overhead ratio		49.00%		60.00%
Operating Segments | Commercial Banking
Segment Reporting Information [Line Items]
Noninterest revenue		$ 917		$ 608
Net interest income		1,476		1,557
Total net revenue		2,393		2,165
Provision for credit losses		(118)		1,010
Noninterest expense		969		986
Income before income tax expense		1,542		169
Income tax expense/(benefit)		374		30
Net income		1,168		139
Average equity		24,000		22,000
Total assets		$ 223,583		$ 247,786
ROE		19.00%		2.00%
Overhead ratio		40.00%		46.00%
Operating Segments | Asset & Wealth Management
Segment Reporting Information [Line Items]
Noninterest revenue		$ 3,146		$ 2,529
Net interest income		931		860
Total net revenue		4,077		3,389
Provision for credit losses		(121)		94
Noninterest expense		2,574		2,435
Income before income tax expense		1,624		860
Income tax expense/(benefit)		380		191
Net income		1,244		669
Average equity		14,000		10,500
Total assets		$ 213,088		$ 178,897
ROE		35.00%		25.00%
Overhead ratio		63.00%		72.00%
Corporate
Segment Reporting Information [Line Items]
Noninterest revenue		$ 382		$ 331
Net interest income		(855)		(165)
Total net revenue		(473)		166
Provision for credit losses		16		8
Noninterest expense		876		146
Income before income tax expense		(1,365)		12
Income tax expense/(benefit)		(785)		137
Net income		(580)		(125)
Average equity		74,542		70,030
Total assets		1,409,564		981,937
Reconciling Items
Segment Reporting Information [Line Items]
Noninterest revenue		(744)		(614)
Net interest income		(109)		(110)
Total net revenue		(853)		(724)
Provision for credit losses		0		0
Noninterest expense		0		0
Income before income tax expense		(853)		(724)
Income tax expense/(benefit)		(853)		(724)
Net income		0		0
Average equity		$ 0		$ 0

[1] Prior-period amounts have been revised to conform with the current presentation. Refer to Note 1 for further information.

[2] The following table presents information on assets and liabilities related to VIEs that are consolidated by the Firm at March 31, 2021, and December 31, 2020. The assets of the consolidated VIEs are used to settle the liabilities of those entities. The holders of the beneficial interests generally do not have recourse to the general credit of JPMorgan Chase. The assets and liabilities in the table below include third-party assets and liabilities of consolidated VIEs and exclude intercompany balances that eliminate in consolidation. Refer to Note 13 for a further discussion (in millions)March 31, 2021December 31, 2020AssetsTrading assets$1,994 $1,934 Loans33,509 37,619 All other assets701 681 Total assets$36,204 $40,234 LiabilitiesBeneficial interests issued by consolidated VIEs$15,671 $17,578 All other liabilities239 233 Total liabilities$15,910 $17,811