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
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Period Type:	duration

- Definition

Originated or purchased loans held-for-investment, other than PCI loans, are measured at the principal amount outstanding, net of the following: allowance for loan losses; net charge-offs; interest applied to principal (for loans accounted for on the cost recovery method); unamortized discounts and premiums; and net deferred loan fees or costs.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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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Balance Type:	na
Period Type:	duration

- Details

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- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=jpm_HomeEquityPortfolioMember
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
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Balance Type:
Period Type:

- Details

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Data Type:	na
Balance Type:
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Data Type:	na
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- Details

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Loans - Consumer, Excluding Credit Card Loan Portfolio, PCI Delinquency Statistics (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total retained loans	$ 804,293	$ 747,508	$ 735,304
Consumer, excluding credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total retained loans	331,732	294,979	$ 288,379
Consumer, excluding credit card \| Home equity \| Senior lien
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total retained loans	$ 15,156	$ 16,367
Total 30 day delinquency rate	3.86%	3.89%
Consumer, excluding credit card \| Home equity \| Junior lien
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total retained loans	$ 31,974	$ 36,375
Total 30 day delinquency rate	2.14%	2.20%
Consumer, excluding credit card \| Residential real estate – PCI \| Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total retained loans	$ 15,490	$ 17,095
Consumer, excluding credit card \| Residential real estate – PCI \| Home equity \| Senior lien
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of senior liens to total financing receivables	20.00%
Consumer, excluding credit card \| Residential real estate – PCI \| Home equity \| Junior lien
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total retained loans	$ 12,269	$ 13,851
Total 30 day delinquency rate	4.56%	6.55%
Consumer, excluding credit card \| Residential real estate – PCI \| HELOCs \| Junior lien \| Within the revolving period
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total retained loans	$ 5,888	$ 8,972
Total 30 day delinquency rate	4.26%	6.42%
Home equity line of credit, open-ended revolving period	10 years
Consumer, excluding credit card \| Residential real estate – PCI \| HELOCs \| Junior lien \| Beyond the revolving period
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total retained loans	$ 5,770	$ 4,143
Total 30 day delinquency rate	4.75%	6.42%
Consumer, excluding credit card \| Residential real estate – PCI \| HELOANs \| Junior lien
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total retained loans	$ 611	$ 736
Total 30 day delinquency rate	5.56%	8.83%