Business Segments (Details) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2019 USD ($)		Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) segment		Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	[1]
Segment Reporting Information [Line Items]
Number of reportable segments | segment				4
Noninterest revenue	$ 14,434		$ 14,268	$ 29,104		$ 28,863
Net interest income	14,398		13,485	28,851		26,797
Total net revenue	28,832		27,753	57,955		55,660
Provision for credit losses	1,149		1,210	2,644		2,375
Noninterest expense	16,341		15,971	32,736		32,051
Income before income tax expense	11,342		10,572	22,575		21,234
Income tax expense/(benefit)	1,690		2,256	3,744		4,206
Net income	9,652		8,316	18,831		17,028
Average equity	233,026		228,901	231,547		228,261
Total assets	$ 2,727,379	[1]	$ 2,590,050	$ 2,727,379	[1]	$ 2,590,050	$ 2,622,532
ROE	16.00%		14.00%	16.00%		14.00%
Overhead ratio	57.00%		58.00%	56.00%		58.00%
Operating Segments | Consumer & Community Banking
Segment Reporting Information [Line Items]
Noninterest revenue	$ 4,440		$ 3,748	$ 8,773		$ 7,887
Net interest income	9,393		8,749	18,811		17,207
Total net revenue	13,833		12,497	27,584		25,094
Provision for credit losses	1,120		1,108	2,434		2,425
Noninterest expense	7,162		6,879	14,373		13,788
Income before income tax expense	5,551		4,510	10,777		8,881
Income tax expense/(benefit)	1,377		1,098	2,640		2,143
Net income	4,174		3,412	8,137		6,738
Average equity	52,000		51,000	52,000		51,000
Total assets	$ 550,690		$ 552,674	$ 550,690		$ 552,674
ROE	31.00%		26.00%	31.00%		26.00%
Overhead ratio	52.00%		55.00%	52.00%		55.00%
Operating Segments | Corporate & Investment Bank
Segment Reporting Information [Line Items]
Noninterest revenue	$ 7,483		$ 7,532	$ 15,146		$ 15,449
Net interest income	2,158		2,391	4,343		4,957
Total net revenue	9,641		9,923	19,489		20,406
Provision for credit losses	0		58	87		(100)
Noninterest expense	5,487		5,403	10,940		11,062
Income before income tax expense	4,154		4,462	8,462		9,444
Income tax expense/(benefit)	1,219		1,264	2,276		2,272
Net income	2,935		3,198	6,186		7,172
Average equity	80,000		70,000	80,000		70,000
Total assets	$ 962,498		$ 908,954	$ 962,498		$ 908,954
ROE	14.00%		17.00%	15.00%		20.00%
Overhead ratio	57.00%		54.00%	56.00%		54.00%
Operating Segments | Commercial Banking
Segment Reporting Information [Line Items]
Noninterest revenue	$ 549		$ 633	$ 1,207		$ 1,182
Net interest income	1,662		1,683	3,342		3,300
Total net revenue	2,211		2,316	4,549		4,482
Provision for credit losses	29		43	119		38
Noninterest expense	864		844	1,737		1,688
Income before income tax expense	1,318		1,429	2,693		2,756
Income tax expense/(benefit)	322		342	644		644
Net income	996		1,087	2,049		2,112
Average equity	22,000		20,000	22,000		20,000
Total assets	$ 220,712		$ 220,232	$ 220,712		$ 220,232
ROE	17.00%		21.00%	18.00%		20.00%
Overhead ratio	39.00%		36.00%	38.00%		38.00%
Operating Segments | Asset & Wealth Management
Segment Reporting Information [Line Items]
Noninterest revenue	$ 2,683		$ 2,687	$ 5,276		$ 5,317
Net interest income	876		885	1,772		1,761
Total net revenue	3,559		3,572	7,048		7,078
Provision for credit losses	2		2	4		17
Noninterest expense	2,596		2,566	5,243		5,147
Income before income tax expense	961		1,004	1,801		1,914
Income tax expense/(benefit)	242		249	421		389
Net income	719		755	1,380		1,525
Average equity	10,500		9,000	10,500		9,000
Total assets	$ 172,149		$ 161,474	$ 172,149		$ 161,474
ROE	27.00%		33.00%	26.00%		33.00%
Overhead ratio	73.00%		72.00%	74.00%		73.00%
Operating Segments | Corporate
Segment Reporting Information [Line Items]
Noninterest revenue	$ (125)		$ 142	$ (117)		$ (43)
Net interest income	447		(62)	864		(109)
Total net revenue	322		80	747		(152)
Provision for credit losses	(2)		(1)	0		(5)
Noninterest expense	232		279	443		366
Income before income tax expense	92		(198)	304		(513)
Income tax expense/(benefit)	(736)		(62)	(775)		6
Net income	828		(136)	1,079		(519)
Average equity	68,526		78,901	67,047		78,261
Total assets	821,330		746,716	821,330		746,716
Reconciling Items
Segment Reporting Information [Line Items]
Noninterest revenue	(596)		(474)	(1,181)		(929)
Net interest income	(138)		(161)	(281)		(319)
Total net revenue	(734)		(635)	(1,462)		(1,248)
Provision for credit losses	0		0	0		0
Noninterest expense	0		0	0		0
Income before income tax expense	(734)		(635)	(1,462)		(1,248)
Income tax expense/(benefit)	(734)		(635)	(1,462)		(1,248)
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, 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) June 30, 2019   December 31, 2018 Assets       Trading assets $ 1,422
  $ 1,966
Loans 53,883
  59,456
All other assets 987
  1,013
Total assets $ 56,292
  $ 62,435
Liabilities       Beneficial interests issued by consolidated VIEs $ 25,585
  $ 20,241
All other liabilities 291
  312
Total liabilities $ 25,876
  $ 20,553