Business Segments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Segment results and reconciliation
Noninterest revenue	$ 53,970		$ 50,608		$ 50,486
Net interest income	55,059		50,097		46,083
Total net revenue	109,029		100,705		96,569
Provision for credit losses	4,871		5,290		5,361
Noninterest expense	63,394		59,515		56,672
Income before income tax expense	40,764		35,900		34,536
Income tax expense/(benefit)	8,290		11,459		9,803
Net income	32,474		24,441		24,733
Average equity	229,222		230,350		224,631
Total assets	$ 2,622,532	[1]	$ 2,533,600	[1]	$ 2,490,972
Return on equity	13.00%		10.00%		10.00%
Overhead ratio	58.00%		59.00%		59.00%
Operating Segments | Consumer & Community Banking
Segment results and reconciliation
Noninterest revenue	$ 16,260		$ 14,710		$ 15,255
Net interest income	35,819		31,775		29,660
Total net revenue	52,079		46,485		44,915
Provision for credit losses	4,753		5,572		4,494
Noninterest expense	27,835		26,062		24,905
Income before income tax expense	19,491		14,851		15,516
Income tax expense/(benefit)	4,639		5,456		5,802
Net income	14,852		9,395		9,714
Average equity	51,000		51,000		51,000
Total assets	$ 557,441		$ 552,601		$ 535,310
Return on equity	28.00%		17.00%		18.00%
Overhead ratio	53.00%		56.00%		55.00%
Operating Segments | Corporate & Investment Bank
Segment results and reconciliation
Noninterest revenue	$ 26,968		$ 24,539		$ 24,449
Net interest income	9,480		10,118		10,891
Total net revenue	36,448		34,657		35,340
Provision for credit losses	(60)		(45)		563
Noninterest expense	20,918		19,407		19,116
Income before income tax expense	15,590		15,295		15,661
Income tax expense/(benefit)	3,817		4,482		4,846
Net income	11,773		10,813		10,815
Average equity	70,000		70,000		64,000
Total assets	$ 903,051		$ 826,384		$ 803,511
Return on equity	16.00%		14.00%		16.00%
Overhead ratio	57.00%		56.00%		54.00%
Operating Segments | Commercial Banking
Segment results and reconciliation
Noninterest revenue	$ 2,343		$ 2,522		$ 2,320
Net interest income	6,716		6,083		5,133
Total net revenue	9,059		8,605		7,453
Provision for credit losses	129		(276)		282
Noninterest expense	3,386		3,327		2,934
Income before income tax expense	5,544		5,554		4,237
Income tax expense/(benefit)	1,307		2,015		1,580
Net income	4,237		3,539		2,657
Average equity	20,000		20,000		16,000
Total assets	$ 220,229		$ 221,228		$ 214,341
Return on equity	20.00%		17.00%		16.00%
Overhead ratio	37.00%		39.00%		39.00%
Operating Segments | Asset & Wealth Management
Segment results and reconciliation
Noninterest revenue	$ 10,539		$ 10,456		$ 9,789
Net interest income	3,537		3,379		3,033
Total net revenue	14,076		13,835		12,822
Provision for credit losses	53		39		26
Noninterest expense	10,353		10,218		9,255
Income before income tax expense	3,670		3,578		3,541
Income tax expense/(benefit)	817		1,241		1,290
Net income	2,853		2,337		2,251
Average equity	9,000		9,000		9,000
Total assets	$ 170,024		$ 151,909		$ 138,384
Return on equity	31.00%		25.00%		24.00%
Overhead ratio	74.00%		74.00%		72.00%
Operating Segments | Corporate
Segment results and reconciliation
Noninterest revenue	$ (263)		$ 1,085		$ 938
Net interest income	135		55		(1,425)
Total net revenue	(128)		1,140		(487)
Provision for credit losses	(4)		0		(4)
Noninterest expense	902		501		462
Income before income tax expense	(1,026)		639		(945)
Income tax expense/(benefit)	215		2,282		(241)
Net income	(1,241)		(1,643)		(704)
Average equity	79,222		80,350		84,631
Total assets	771,787		781,478		799,426
Reconciling Items
Segment results and reconciliation
Noninterest revenue	(1,877)		(2,704)		(2,265)
Net interest income	(628)		(1,313)		(1,209)
Total net revenue	(2,505)		(4,017)		(3,474)
Provision for credit losses	0		0		0
Noninterest expense	0		0		0
Income before income tax expense	(2,505)		(4,017)		(3,474)
Income tax expense/(benefit)	(2,505)		(4,017)		(3,474)
Net income	0		0		0
Average equity	0		$ 0		$ 0
Tax benefit related to tax-oriented investments as a result of the TCJA	$ 375

[1] The following table presents information on assets and liabilities related to VIEs that are consolidated by the Firm at December 31, 2018 and 2017. The assets of the consolidated VIEs are used to settle the liabilities of those entities. The holders of the beneficial interests 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 14. December 31, (in millions) 2018   2017 Assets       Trading assets $ 1,966
  $ 1,449
Loans 59,456
  68,995
All other assets 1,013
  2,674
Total assets $ 62,435
  $ 73,118
Liabilities       Beneficial interests issued by consolidated VIEs $ 20,241
  $ 26,081
All other liabilities 312
  349
Total liabilities $ 20,553
  $ 26,430