Business Segments (Details) $ in Millions		3 Months Ended			6 Months Ended
		Jun. 30, 2021 USD ($)		Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) segment		Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	[2]
Segment Reporting Information [Line Items]
Number of reportable segments | segment					4
Noninterest revenue		$ 17,738		$ 19,222	$ 37,115		$ 33,069
Net interest income		12,741		13,853	25,630		28,292
Total net revenue		30,479		33,075	62,745		61,361
Provision for credit losses		(2,285)		10,473	(6,441)		18,758
Noninterest expense		17,667		16,942	36,392		33,733
Income before income tax expense		15,097		5,660	32,794		8,870
Income tax expense/(benefit)	[1]	3,149		973	6,546		1,318
Net income		11,948		4,687	26,248		7,552
Average equity		250,849		234,408	248,209		234,469
Total assets		$ 3,684,256	[2]	$ 3,212,643	$ 3,684,256	[2]	$ 3,212,643	$ 3,384,757
ROE		18.00%		7.00%	21.00%		6.00%
Overhead ratio		58.00%		51.00%	58.00%		55.00%
Operating Segments | Consumer & Community Banking
Segment Reporting Information [Line Items]
Noninterest revenue		$ 4,726		$ 4,222	$ 9,314		$ 8,319
Net interest income		8,034		8,136	15,963		17,326
Total net revenue		12,760		12,358	25,277		25,645
Provision for credit losses		(1,868)		5,828	(5,470)		11,600
Noninterest expense		7,062		6,767	14,264		14,036
Income before income tax expense		7,566		(237)	16,483		9
Income tax expense/(benefit)		1,932		(61)	4,121		(12)
Net income		5,634		(176)	12,362		21
Average equity		50,000		52,000	50,000		52,000
Total assets		$ 494,305		$ 498,658	$ 494,305		$ 498,658
ROE		44.00%		(2.00%)	49.00%		(1.00%)
Overhead ratio		55.00%		55.00%	56.00%		55.00%
Operating Segments | Corporate & Investment Bank
Segment Reporting Information [Line Items]
Noninterest revenue		$ 9,912		$ 12,304	$ 21,000		$ 19,200
Net interest income		3,302		4,079	6,819		7,186
Total net revenue		13,214		16,383	27,819		26,386
Provision for credit losses		(79)		1,987	(410)		3,388
Noninterest expense		6,523		6,812	13,627		12,767
Income before income tax expense		6,770		7,584	14,602		10,231
Income tax expense/(benefit)		1,785		2,133	3,877		2,795
Net income		4,985		5,451	10,725		7,436
Average equity		83,000		80,000	83,000		80,000
Total assets		$ 1,363,992		$ 1,080,189	$ 1,363,992		$ 1,080,189
ROE		23.00%		27.00%	25.00%		18.00%
Overhead ratio		49.00%		42.00%	49.00%		48.00%
Operating Segments | Commercial Banking
Segment Reporting Information [Line Items]
Noninterest revenue		$ 950		$ 823	$ 1,867		$ 1,431
Net interest income		1,533		1,577	3,009		3,134
Total net revenue		2,483		2,400	4,876		4,565
Provision for credit losses		(377)		2,431	(495)		3,441
Noninterest expense		981		893	1,950		1,879
Income before income tax expense		1,879		(924)	3,421		(755)
Income tax expense/(benefit)		459		(243)	833		(213)
Net income		1,420		(681)	2,588		(542)
Average equity		24,000		22,000	24,000		22,000
Total assets		$ 226,022		$ 235,034	$ 226,022		$ 235,034
ROE		23.00%		(13.00%)	21.00%		(6.00%)
Overhead ratio		40.00%		37.00%	40.00%		41.00%
Operating Segments | Asset & Wealth Management
Segment Reporting Information [Line Items]
Noninterest revenue		$ 3,165		$ 2,575	$ 6,311		$ 5,104
Net interest income		942		855	1,873		1,715
Total net revenue		4,107		3,430	8,184		6,819
Provision for credit losses		(10)		223	(131)		317
Noninterest expense		2,586		2,323	5,160		4,758
Income before income tax expense		1,531		884	3,155		1,744
Income tax expense/(benefit)		378		223	758		414
Net income		1,153		661	2,397		1,330
Average equity		14,000		10,500	14,000		10,500
Total assets		$ 217,284		$ 176,782	$ 217,284		$ 176,782
ROE		32.00%		24.00%	34.00%		25.00%
Overhead ratio		63.00%		68.00%	63.00%		70.00%
Corporate
Segment Reporting Information [Line Items]
Noninterest revenue		$ (208)		$ (67)	$ 174		$ 264
Net interest income		(961)		(687)	(1,816)		(852)
Total net revenue		(1,169)		(754)	(1,642)		(588)
Provision for credit losses		49		4	65		12
Noninterest expense		515		147	1,391		293
Income before income tax expense		(1,733)		(905)	(3,098)		(893)
Income tax expense/(benefit)		(489)		(337)	(1,274)		(200)
Net income		(1,244)		(568)	(1,824)		(693)
Average equity		79,849		69,908	77,209		69,969
Total assets		1,382,653		1,221,980	1,382,653		1,221,980
Reconciling Items
Segment Reporting Information [Line Items]
Noninterest revenue		(807)		(635)	(1,551)		(1,249)
Net interest income		(109)		(107)	(218)		(217)
Total net revenue		(916)		(742)	(1,769)		(1,466)
Provision for credit losses		0		0	0		0
Noninterest expense		0		0	0		0
Income before income tax expense		(916)		(742)	(1,769)		(1,466)
Income tax expense/(benefit)		(916)		(742)	(1,769)		(1,466)
Net income		0		0	0		0
Average equity		$ 0		$ 0	$ 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 June 30, 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)June 30, 2021December 31, 2020AssetsTrading assets$1,995 $1,934 Loans35,284 37,619 All other assets609 681 Total assets$37,888 $40,234 LiabilitiesBeneficial interests issued by consolidated VIEs$14,403 $17,578 All other liabilities233 233 Total liabilities$14,636 $17,811