In general, the period of time that home equity lines of credit are open-ended revolving loans.

No definition available.

Name:	jpm_HomeEquityLineOfCreditOpenEndedRevolvingPeriod
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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

This item represents the percentage of loans 30 plus days past due as compared to total retained loans.

+ References

No definition available.

+ Details

Name:	jpm_PercentageOfLoansThirtyPlusDaysPastDueToTotalRetainedLoans
Namespace Prefix:	jpm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of the financing receivables that consists of senior liens.

+ References

No definition available.

+ Details

Name:	jpm_PercentageOfSeniorLiensToTotalFinancingReceivables
Namespace Prefix:	jpm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

+ Details

Name:	us-gaap_LoansAndLeasesReceivableNetOfDeferredIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=jpm_HomeEquityLoanandHomeEquityLineofCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LienCategoryAxis=us-gaap_SeniorLienMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LienCategoryAxis=us-gaap_JuniorLienMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditLossStatusAxis=us-gaap_FinancialAssetAcquiredWithCreditDeteriorationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
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Loans - Consumer, Excluding Credit Card Loans, PCI Delinquency Statistics (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 969,415	$ 924,838	$ 889,907
Consumer, excluding credit card
Loans and Leases Receivable Disclosure [Line Items]
Loans	373,637	372,553	$ 364,406
Consumer, excluding credit card \| Home equity
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 28,340	$ 33,450
Total 30 plus day delinquency rate	2.57%	3.17%
Consumer, excluding credit card \| Home equity \| Senior lien
Loans and Leases Receivable Disclosure [Line Items]
Percentage of senior liens to total financing receivables	37.00%
Consumer, excluding credit card \| Home equity \| Junior lien
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 17,924	$ 21,266
Total 30 plus day delinquency rate	2.00%	2.64%
Consumer, excluding credit card \| HELOANs \| Junior lien
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 1,030	$ 1,371
Total 30 plus day delinquency rate	2.82%	3.50%
Consumer, excluding credit card \| Residential real estate – PCI \| Home equity
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 8,963	$ 10,799
Consumer, excluding credit card \| Residential real estate – PCI \| Home equity \| Senior lien
Loans and Leases Receivable Disclosure [Line Items]
Percentage of senior liens to total financing receivables	26.00%
Consumer, excluding credit card \| Residential real estate – PCI \| Home equity \| Junior lien
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 6,811	$ 8,286
Total 30 plus day delinquency rate	3.98%	4.65%
Consumer, excluding credit card \| Residential real estate – PCI \| HELOCs \| Junior lien
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 6,531	$ 7,926
Total 30 plus day delinquency rate	4.00%	4.62%
Consumer, excluding credit card \| Residential real estate – PCI \| HELOCs \| Junior lien \| Within the revolving period
Loans and Leases Receivable Disclosure [Line Items]
Open-ended revolving period	10 years
Consumer, excluding credit card \| Residential real estate – PCI \| HELOANs \| Junior lien
Loans and Leases Receivable Disclosure [Line Items]
Loans	$ 280	$ 360
Total 30 plus day delinquency rate	3.57%	5.28%