Business Segments (Details) $ in Millions		3 Months Ended			9 Months Ended
		Sep. 30, 2021 USD ($)		Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) segment		Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	[2]
Segment Reporting Information [Line Items]
Number of reportable segments | segment					4
Noninterest revenue		$ 16,567		$ 16,242	$ 53,682		$ 49,311
Net interest income		13,080		13,013	38,710		41,305
Total net revenue		29,647		29,255	92,392		90,616
Provision for credit losses		(1,527)		611	(7,968)		19,369
Noninterest expense		17,063		16,875	53,455		50,608
Income before income tax expense		14,111		11,769	46,905		20,639
Income tax expense/(benefit)	[1]	2,424		2,326	8,970		3,644
Net income		11,687		9,443	37,935		16,995
Average equity		253,556		236,797	250,011		235,251
Total assets		$ 3,757,576	[2]	$ 3,245,061	$ 3,757,576	[2]	$ 3,245,061	$ 3,384,757
ROE		18.00%		15.00%	20.00%		9.00%
Overhead ratio		58.00%		58.00%	58.00%		56.00%
Operating Segments | Consumer & Community Banking
Segment Reporting Information [Line Items]
Noninterest revenue		$ 4,138		$ 4,863	$ 13,452		$ 13,182
Net interest income		8,383		8,032	24,346		25,358
Total net revenue		12,521		12,895	37,798		38,540
Provision for credit losses		(459)		795	(5,929)		12,395
Noninterest expense		7,238		6,912	21,502		20,948
Income before income tax expense		5,742		5,188	22,225		5,197
Income tax expense/(benefit)		1,401		1,317	5,522		1,305
Net income		4,341		3,871	16,703		3,892
Average equity		50,000		52,000	50,000		52,000
Total assets		$ 493,169		$ 487,063	$ 493,169		$ 487,063
ROE		34.00%		29.00%	44.00%		9.00%
Overhead ratio		58.00%		54.00%	57.00%		54.00%
Operating Segments | Corporate & Investment Bank
Segment Reporting Information [Line Items]
Noninterest revenue		$ 9,061		$ 8,118	$ 30,061		$ 27,318
Net interest income		3,335		3,428	10,154		10,614
Total net revenue		12,396		11,546	40,215		37,932
Provision for credit losses		(638)		(81)	(1,048)		3,307
Noninterest expense		5,871		5,832	19,498		18,599
Income before income tax expense		7,163		5,795	21,765		16,026
Income tax expense/(benefit)		1,601		1,486	5,478		4,281
Net income		5,562		4,309	16,287		11,745
Average equity		83,000		80,000	83,000		80,000
Total assets		$ 1,355,752		$ 1,088,282	$ 1,355,752		$ 1,088,282
ROE		26.00%		21.00%	25.00%		19.00%
Overhead ratio		47.00%		51.00%	48.00%		49.00%
Operating Segments | Commercial Banking
Segment Reporting Information [Line Items]
Noninterest revenue		$ 988		$ 761	$ 2,855		$ 2,192
Net interest income		1,532		1,524	4,541		4,658
Total net revenue		2,520		2,285	7,396		6,850
Provision for credit losses		(363)		(147)	(858)		3,294
Noninterest expense		1,032		969	2,982		2,848
Income before income tax expense		1,851		1,463	5,272		708
Income tax expense/(benefit)		444		377	1,277		164
Net income		1,407		1,086	3,995		544
Average equity		24,000		22,000	24,000		22,000
Total assets		$ 227,670		$ 228,583	$ 227,670		$ 228,583
ROE		22.00%		19.00%	21.00%		2.00%
Overhead ratio		41.00%		42.00%	40.00%		42.00%
Operating Segments | Asset & Wealth Management
Segment Reporting Information [Line Items]
Noninterest revenue		$ 3,312		$ 2,739	$ 9,623		$ 7,843
Net interest income		988		815	2,861		2,530
Total net revenue		4,300		3,554	12,484		10,373
Provision for credit losses		(60)		(52)	(191)		265
Noninterest expense		2,762		2,443	7,922		7,201
Income before income tax expense		1,598		1,163	4,753		2,907
Income tax expense/(benefit)		404		287	1,162		701
Net income		1,194		876	3,591		2,206
Average equity		14,000		10,500	14,000		10,500
Total assets		$ 221,702		$ 187,858	$ 221,702		$ 187,858
ROE		33.00%		32.00%	33.00%		27.00%
Overhead ratio		64.00%		69.00%	63.00%		69.00%
Corporate
Segment Reporting Information [Line Items]
Noninterest revenue		$ (242)		$ 343	$ (68)		$ 607
Net interest income		(1,054)		(682)	(2,870)		(1,534)
Total net revenue		(1,296)		(339)	(2,938)		(927)
Provision for credit losses		(7)		96	58		108
Noninterest expense		160		719	1,551		1,012
Income before income tax expense		(1,449)		(1,154)	(4,547)		(2,047)
Income tax expense/(benefit)		(632)		(455)	(1,906)		(655)
Net income		(817)		(699)	(2,641)		(1,392)
Average equity		82,556		72,297	79,011		70,751
Total assets		1,459,283		1,253,275	1,459,283		1,253,275
Reconciling Items
Segment Reporting Information [Line Items]
Noninterest revenue		(690)		(582)	(2,241)		(1,831)
Net interest income		(104)		(104)	(322)		(321)
Total net revenue		(794)		(686)	(2,563)		(2,152)
Provision for credit losses		0		0	0		0
Noninterest expense		0		0	0		0
Income before income tax expense		(794)		(686)	(2,563)		(2,152)
Income tax expense/(benefit)		(794)		(686)	(2,563)		(2,152)
Net income		0		0	0		0
Average equity		$ 0		$ 0	$ 0		$ 0

[1] Prior-period amounts have been revised to conform with the current presentation. Refer to Note 1 for further information.

[2] The following table presents information on assets and liabilities related to VIEs that are consolidated by the Firm at September 30, 2021, and December 31, 2020. 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, 2021December 31, 2020AssetsTrading assets$2,011 $1,934 Loans35,352 37,619 All other assets516 681 Total assets$37,879 $40,234 LiabilitiesBeneficial interests issued by consolidated VIEs$13,257 $17,578 All other liabilities234 233 Total liabilities$13,491 $17,811