Business Segments (Details) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2019 USD ($)		Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) segment		Sep. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)	[1]
Segment Reporting Information [Line Items]
Number of reportable segments | segment				4
Noninterest revenue	$ 15,113		$ 13,352	$ 44,217		$ 42,215
Net interest income	14,228		13,908	43,079		40,705
Total net revenue	29,341		27,260	87,296		82,920
Provision for credit losses	1,514		948	4,158		3,323
Noninterest expense	16,422		15,623	49,158		47,674
Income before income tax expense	11,405		10,689	33,980		31,923
Income tax expense/(benefit)	2,325		2,309	6,069		6,515
Net income	9,080		8,380	27,911		25,408
Average equity	235,613		230,439	232,917		228,995
Total assets	$ 2,764,661	[1]	$ 2,615,183	$ 2,764,661	[1]	$ 2,615,183	$ 2,622,532
ROE	15.00%		14.00%	15.00%		14.00%
Overhead ratio	56.00%		57.00%	56.00%		57.00%
Operating Segments | Consumer & Community Banking
Segment Reporting Information [Line Items]
Noninterest revenue	$ 5,095		$ 4,176	$ 13,868		$ 12,063
Net interest income	9,164		9,114	27,975		26,321
Total net revenue	14,259		13,290	41,843		38,384
Provision for credit losses	1,311		980	3,745		3,405
Noninterest expense	7,290		6,982	21,663		20,770
Income before income tax expense	5,658		5,328	16,435		14,209
Income tax expense/(benefit)	1,385		1,242	4,025		3,385
Net income	4,273		4,086	12,410		10,824
Average equity	52,000		51,000	52,000		51,000
Total assets	$ 532,487		$ 560,432	$ 532,487		$ 560,432
ROE	32.00%		31.00%	31.00%		27.00%
Overhead ratio	51.00%		53.00%	52.00%		54.00%
Operating Segments | Corporate & Investment Bank
Segment Reporting Information [Line Items]
Noninterest revenue	$ 7,182		$ 6,505	$ 22,328		$ 21,954
Net interest income	2,156		2,300	6,499		7,257
Total net revenue	9,338		8,805	28,827		29,211
Provision for credit losses	92		(42)	179		(142)
Noninterest expense	5,348		5,175	16,288		16,237
Income before income tax expense	3,898		3,672	12,360		13,116
Income tax expense/(benefit)	1,089		1,046	3,365		3,318
Net income	2,809		2,626	8,995		9,798
Average equity	80,000		70,000	80,000		70,000
Total assets	$ 1,023,132		$ 928,148	$ 1,023,132		$ 928,148
ROE	13.00%		14.00%	14.00%		18.00%
Overhead ratio	57.00%		59.00%	57.00%		56.00%
Operating Segments | Commercial Banking
Segment Reporting Information [Line Items]
Noninterest revenue	$ 599		$ 576	$ 1,806		$ 1,758
Net interest income	1,608		1,695	4,950		4,995
Total net revenue	2,207		2,271	6,756		6,753
Provision for credit losses	67		(15)	186		23
Noninterest expense	881		853	2,618		2,541
Income before income tax expense	1,259		1,433	3,952		4,189
Income tax expense/(benefit)	322		344	966		988
Net income	937		1,089	2,986		3,201
Average equity	22,000		20,000	22,000		20,000
Total assets	$ 222,483		$ 217,194	$ 222,483		$ 217,194
ROE	16.00%		21.00%	17.00%		20.00%
Overhead ratio	40.00%		38.00%	39.00%		38.00%
Operating Segments | Asset & Wealth Management
Segment Reporting Information [Line Items]
Noninterest revenue	$ 2,713		$ 2,680	$ 7,989		$ 7,997
Net interest income	855		879	2,627		2,640
Total net revenue	3,568		3,559	10,616		10,637
Provision for credit losses	44		23	48		40
Noninterest expense	2,622		2,585	7,865		7,732
Income before income tax expense	902		951	2,703		2,865
Income tax expense/(benefit)	234		227	655		616
Net income	668		724	2,048		2,249
Average equity	10,500		9,000	10,500		9,000
Total assets	$ 174,226		$ 166,716	$ 174,226		$ 166,716
ROE	24.00%		31.00%	25.00%		32.00%
Overhead ratio	73.00%		73.00%	74.00%		73.00%
Operating Segments | Corporate
Segment Reporting Information [Line Items]
Noninterest revenue	$ 120		$ (177)	$ 3		$ (220)
Net interest income	572		74	1,436		(35)
Total net revenue	692		(103)	1,439		(255)
Provision for credit losses	0		2	0		(3)
Noninterest expense	281		28	724		394
Income before income tax expense	411		(133)	715		(646)
Income tax expense/(benefit)	18		12	(757)		18
Net income	393		(145)	1,472		(664)
Average equity	71,113		80,439	68,417		78,995
Total assets	812,333		742,693	812,333		742,693
Reconciling Items
Segment Reporting Information [Line Items]
Noninterest revenue	(596)		(408)	(1,777)		(1,337)
Net interest income	(127)		(154)	(408)		(473)
Total net revenue	(723)		(562)	(2,185)		(1,810)
Provision for credit losses	0		0	0		0
Noninterest expense	0		0	0		0
Income before income tax expense	(723)		(562)	(2,185)		(1,810)
Income tax expense/(benefit)	(723)		(562)	(2,185)		(1,810)
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 September 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. Refer to Note 13 for a further discussion. (in millions) September 30, 2019   December 31, 2018 Assets       Trading assets $ 1,461
  $ 1,966
Loans 53,022
  59,456
All other assets 974
  1,013
Total assets $ 55,457
  $ 62,435
Liabilities       Beneficial interests issued by consolidated VIEs $ 18,515
  $ 20,241
All other liabilities 301
  312
Total liabilities $ 18,816
  $ 20,553