Business Segments (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) segment		Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)	[1]
Segment Reporting Information [Line Items]
Number of reportable segments | segment	4
Noninterest revenue	$ 14,670		$ 14,595
Net interest income	14,453		13,312
Total net revenue	29,123		27,907
Provision for credit losses	1,495		1,165
Noninterest expense	16,395		16,080
Income before income tax expense	11,233		10,662
Income tax expense/(benefit)	2,054		1,950
Net income	9,179		8,712
Average equity	230,051		227,615
Total assets	$ 2,737,188	[1]	$ 2,609,785	$ 2,622,532
Return on equity	16.00%		15.00%
Overhead ratio	56.00%		58.00%
Operating Segments | Consumer & Community Banking
Segment Reporting Information [Line Items]
Noninterest revenue	$ 4,333		$ 4,139
Net interest income	9,418		8,458
Total net revenue	13,751		12,597
Provision for credit losses	1,314		1,317
Noninterest expense	7,211		6,909
Income before income tax expense	5,226		4,371
Income tax expense/(benefit)	1,263		1,045
Net income	3,963		3,326
Average equity	52,000		51,000
Total assets	$ 552,486		$ 540,659
Return on equity	30.00%		25.00%
Overhead ratio	52.00%		55.00%
Operating Segments | Corporate & Investment Bank
Segment Reporting Information [Line Items]
Noninterest revenue	$ 7,663		$ 7,917
Net interest income	2,185		2,566
Total net revenue	9,848		10,483
Provision for credit losses	87		(158)
Noninterest expense	5,453		5,659
Income before income tax expense	4,308		4,982
Income tax expense/(benefit)	1,057		1,008
Net income	3,251		3,974
Average equity	80,000		70,000
Total assets	$ 1,006,111		$ 909,845
Return on equity	16.00%		22.00%
Overhead ratio	55.00%		54.00%
Operating Segments | Commercial Banking
Segment Reporting Information [Line Items]
Noninterest revenue	$ 658		$ 549
Net interest income	1,680		1,617
Total net revenue	2,338		2,166
Provision for credit losses	90		(5)
Noninterest expense	873		844
Income before income tax expense	1,375		1,327
Income tax expense/(benefit)	322		302
Net income	1,053		1,025
Average equity	22,000		20,000
Total assets	$ 216,111		$ 220,880
Return on equity	19.00%		20.00%
Overhead ratio	37.00%		39.00%
Operating Segments | Asset & Wealth Management
Segment Reporting Information [Line Items]
Noninterest revenue	$ 2,593		$ 2,630
Net interest income	896		876
Total net revenue	3,489		3,506
Provision for credit losses	2		15
Noninterest expense	2,647		2,581
Income before income tax expense	840		910
Income tax expense/(benefit)	179		140
Net income	661		770
Average equity	10,500		9,000
Total assets	$ 165,865		$ 158,439
Return on equity	25.00%		34.00%
Overhead ratio	76.00%		74.00%
Operating Segments | Corporate
Segment Reporting Information [Line Items]
Noninterest revenue	$ 8		$ (185)
Net interest income	417		(47)
Total net revenue	425		(232)
Provision for credit losses	2		(4)
Noninterest expense	211		87
Income before income tax expense	212		(315)
Income tax expense/(benefit)	(39)		68
Net income	251		(383)
Average equity	65,551		77,615
Total assets	796,615		779,962
Reconciling Items
Segment Reporting Information [Line Items]
Noninterest revenue	(585)		(455)
Net interest income	(143)		(158)
Total net revenue	(728)		(613)
Provision for credit losses	0		0
Noninterest expense	0		0
Income before income tax expense	(728)		(613)
Income tax expense/(benefit)	(728)		(613)
Net income	0		0
Average equity	$ 0		$ 0

[1] The following table presents information on assets and liabilities related to VIEs that are consolidated by the Firm at March 31, 2019, and December 31, 2018. 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) Mar 31, 2019   Dec 31, 2018 Assets       Trading assets $ 1,605
  $ 1,966
Loans 55,460
  59,456
All other assets 1,058
  1,013
Total assets $ 58,123
  $ 62,435
Liabilities       Beneficial interests issued by consolidated VIEs $ 25,955
  $ 20,241
All other liabilities 302
  312
Total liabilities $ 26,257
  $ 20,553