Business Segments (Details) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2018 USD ($)		Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) segment		Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)	[1]
Segment Reporting Information [Line Items]
Number of reportable segments | segment				4
Noninterest revenue	$ 14,268		$ 13,523	$ 28,863		$ 26,398
Net interest income	13,485		12,208	26,797		24,272
Total net revenue	27,753		25,731	55,660		50,670
Provision for credit losses	1,210		1,215	2,375		2,530
Noninterest expense	15,971		14,767	32,051		30,050
Income before income tax expense	10,572		9,749	21,234		18,090
Income tax expense/(benefit)	2,256		2,720	4,206		4,613
Net income	8,316		7,029	17,028		13,477
Average equity	228,901		230,200	228,261		228,959
Total assets	$ 2,590,050	[1]	$ 2,563,174	$ 2,590,050	[1]	$ 2,563,174	$ 2,533,600
Return on equity	14.00%		12.00%	14.00%		11.00%
Overhead ratio	58.00%		57.00%	58.00%		59.00%
Operating Segments | Consumer & Community Banking
Segment Reporting Information [Line Items]
Noninterest revenue	$ 3,748		$ 3,684	$ 7,887		$ 7,001
Net interest income	8,749		7,728	17,207		15,381
Total net revenue	12,497		11,412	25,094		22,382
Provision for credit losses	1,108		1,394	2,425		2,824
Noninterest expense	6,879		6,500	13,788		12,895
Income before income tax expense	4,510		3,518	8,881		6,663
Income tax expense/(benefit)	1,098		1,295	2,143		2,452
Net income	3,412		2,223	6,738		4,211
Average equity	51,000		51,000	51,000		51,000
Total assets	$ 552,674		$ 529,859	$ 552,674		$ 529,859
Return on equity	26.00%		17.00%	26.00%		16.00%
Overhead ratio	55.00%		57.00%	55.00%		58.00%
Operating Segments | Corporate & Investment Bank
Segment Reporting Information [Line Items]
Noninterest revenue	$ 7,532		$ 6,480	$ 15,449		$ 13,479
Net interest income	2,391		2,445	4,957		5,045
Total net revenue	9,923		8,925	20,406		18,524
Provision for credit losses	58		(53)	(100)		(149)
Noninterest expense	5,403		4,877	11,062		10,061
Income before income tax expense	4,462		4,101	9,444		8,612
Income tax expense/(benefit)	1,264		1,391	2,272		2,661
Net income	3,198		2,710	7,172		5,951
Average equity	70,000		70,000	70,000		70,000
Total assets	$ 908,954		$ 847,377	$ 908,954		$ 847,377
Return on equity	17.00%		15.00%	20.00%		16.00%
Overhead ratio	54.00%		55.00%	54.00%		54.00%
Operating Segments | Commercial Banking
Segment Reporting Information [Line Items]
Noninterest revenue	$ 633		$ 583	$ 1,182		$ 1,182
Net interest income	1,683		1,505	3,300		2,924
Total net revenue	2,316		2,088	4,482		4,106
Provision for credit losses	43		(130)	38		(167)
Noninterest expense	844		790	1,688		1,615
Income before income tax expense	1,429		1,428	2,756		2,658
Income tax expense/(benefit)	342		526	644		957
Net income	1,087		902	2,112		1,701
Average equity	20,000		20,000	20,000		20,000
Total assets	$ 220,232		$ 220,676	$ 220,232		$ 220,676
Return on equity	21.00%		17.00%	20.00%		16.00%
Overhead ratio	36.00%		38.00%	38.00%		39.00%
Operating Segments | Asset & Wealth Management
Segment Reporting Information [Line Items]
Noninterest revenue	$ 2,687		$ 2,591	$ 5,317		$ 5,060
Net interest income	885		846	1,761		1,665
Total net revenue	3,572		3,437	7,078		6,725
Provision for credit losses	2		4	17		22
Noninterest expense	2,566		2,417	5,147		5,198
Income before income tax expense	1,004		1,016	1,914		1,505
Income tax expense/(benefit)	249		392	389		496
Net income	755		624	1,525		1,009
Average equity	9,000		9,000	9,000		9,000
Total assets	$ 161,474		$ 147,508	$ 161,474		$ 147,508
Return on equity	33.00%		27.00%	33.00%		22.00%
Overhead ratio	72.00%		70.00%	73.00%		77.00%
Operating Segments | Corporate
Segment Reporting Information [Line Items]
Noninterest revenue	$ 142		$ 781	$ (43)		$ 854
Net interest income	(62)		23	(109)		(75)
Total net revenue	80		804	(152)		779
Provision for credit losses	(1)		0	(5)		0
Noninterest expense	279		183	366		281
Income before income tax expense	(198)		621	(513)		498
Income tax expense/(benefit)	(62)		51	6		(107)
Net income	(136)		570	(519)		605
Average equity	78,901		80,200	78,261		78,959
Total assets	746,716		817,754	746,716		817,754
Reconciling Items
Segment Reporting Information [Line Items]
Noninterest revenue	(474)		(596)	(929)		(1,178)
Net interest income	(161)		(339)	(319)		(668)
Total net revenue	(635)		(935)	(1,248)		(1,846)
Provision for credit losses	0		0	0		0
Noninterest expense	0		0	0		0
Income before income tax expense	(635)		(935)	(1,248)		(1,846)
Income tax expense/(benefit)	(635)		(935)	(1,248)		(1,846)
Net income	0		0	0		0
Average equity	$ 0		$ 0	$ 0		$ 0

[1] The following table presents information on assets and liabilities related to VIEs that are consolidated by the Firm at June 30, 2018, and December 31, 2017. 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. For a further discussion, refer to Note 13.(in millions)Jun 30, 2018 Dec 31, 2017Assets Trading assets$1,514 $1,449Loans58,404 68,995All other assets2,412 2,674Total assets$62,330 $73,118Liabilities Beneficial interests issued by consolidated VIEs$21,323 $26,081All other liabilities333 349Total liabilities$21,656 $26,430