Reflects the amount of cumulative deferred costs.

No definition available.

Name:	jpm_LoansAndLeasesReceivableDeferredCosts
Namespace Prefix:	jpm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

As part of the criteria for determining whether a loan may be charged off, the period of time the loan is required to be past due. The loan period past due typically is not the only criteria used in determining a charge-off.

+ References

No definition available.

+ Details

Name:	jpm_LoansChargeOffCriteriaPeriodPastDue
Namespace Prefix:	jpm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The aggregate carrying amount of loans receivable that that the entity has elected to carry at fair value. Mortgage loans exclude mortgage-backed securities which are considered a debt security (other loan).

+ References

No definition available.

+ Details

Name:	jpm_LoansReceivableAtFairValue
Namespace Prefix:	jpm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- 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

Name:	jpm_LoansReceivableHeldForInvestmentNetOfDeferredIncome
Namespace Prefix:	jpm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The aggregate carrying amount of loans receivable that will be sold to other entities, excluding loans that the entity has elected to carry at fair value. Includes mortgage and all other loans (collectively, loans) not classified as held for investment. Such loans are stated at the lower of cost or market. Mortgage loans exclude mortgage-backed securities which are considered a debt security (other loan).

+ References

No definition available.

+ Details

Name:	jpm_LoansReceivableHeldForSaleExcludingLoansAtFairValue
Namespace Prefix:	jpm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

For commercial real estate loans, the period of time for collateral values to be updated, either by obtaining a new appraisal or by performing an internal analysis, in accordance with the Firm’s policies (collateral values are generally based on appraisals from internal and external valuation sources).

+ References

No definition available.

+ Details

Name:	jpm_NumberOfMonthsBeforeUpdatingCollateralValuesOnCommercialRealEstateLoans
Namespace Prefix:	jpm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

For residential real estate loans with collateral, when it becomes likely that a borrower is either unable or unwilling to pay, the number of months the Firm waits to update the broker's price opinion of a home based on an exterior-only valuation.

+ References

No definition available.

+ Details

Name:	jpm_NumberOfMonthsBeforeUpdatingExteriorOpinionOnHomeValuation
Namespace Prefix:	jpm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of months a borrower has performed under modified terms of a loan.

+ References

No definition available.

+ Details

Name:	jpm_NumberOfMonthsBorrowerHasPerformedUnderModifiedTerms
Namespace Prefix:	jpm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

For loans modified in TDRs, the number of borrower payments under the modified terms to generally be recognized as interest income on a cash basis.

+ References

No definition available.

+ Details

Name:	jpm_NumberOfPaymentsUnderModifiedTermsToRecognizeInterestOnCashBasis
Namespace Prefix:	jpm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

As part of the factors to be considered in analyzing credit statstics, the period of time the loan is past due before being charged off.

+ References

No definition available.

+ Details

Name:	jpm_PeriodPastDueCreditAnalysisFactorsChargeOffCriteria
Namespace Prefix:	jpm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Loans - By Portfolio Segment (Details) (USD $)	12 Months Ended
Loans - By Portfolio Segment (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Loan balances by portfolio segment:
Total retained loans	747,508,000,000	$ 724,177,000,000	$ 726,835,000,000
Held-for-sale	7,217,000,000	12,230,000,000
At fair value	2,611,000,000jpm_LoansReceivableAtFairValue	2,011,000,000jpm_LoansReceivableAtFairValue
Loans	757,336,000,000	738,418,000,000
Loans and leases receivable deferred costs	1,300,000,000	1,900,000,000
Consumer, excluding credit card
Loan balances by portfolio segment:
Loans	295,374,000,000	289,063,000,000
Residential mortgage
Loans and Leases Receivable Disclosure [Line Items]
Number of months the borrower has performed under modified terms	6 months
Days Past Due, 90 or More \| Consumer, excluding credit card
Loans and Leases Receivable Disclosure [Line Items]
Period past due, credit analysis factors, charge off criteria	90 days
Days Past Due, 30 or More \| Consumer, excluding credit card
Loans and Leases Receivable Disclosure [Line Items]
Period past due, credit analysis factors, charge off criteria	30 days
Days Past Due, 180 or More \| Residential Real Estate, Non-Modified Credit Card and Scored Business Banking Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans, charge-off criteria, period past due	180 days
Days Past Due, 120 or More \| Auto and Student Loans
Loans and Leases Receivable Disclosure [Line Items]
Loans, charge-off criteria, period past due	120 days
Days Past Due, 60 or More, or Sooner with Determination of Collateral Dependence \| Residential Real Estate and Auto Loans
Loans and Leases Receivable Disclosure [Line Items]
Period past due, credit analysis factors, charge off criteria	60 days
Days Until Charge-Off, Less Than 60, with Notification of Bankruptcy Filing or Other Event \| Credit Card and Scored Business Banking Loans
Loans and Leases Receivable Disclosure [Line Items]
Period past due, credit analysis factors, charge off criteria	60 days
Days Past Due, 60 or More, with Notification of Bankruptcy Filing or Other Event \| Student loan securitization
Loans and Leases Receivable Disclosure [Line Items]
Period past due, credit analysis factors, charge off criteria	60 days
Financing Receivable, Policy, Current \| Days Past Due, 120 or More \| Consumer Credit Card Financing Receivable
Loans and Leases Receivable Disclosure [Line Items]
Loans, charge-off criteria, period past due	120 days
Financing Receivable, Policy, Previous \| Days Past Due, 180 or More \| Consumer Credit Card Financing Receivable
Loans and Leases Receivable Disclosure [Line Items]
Loans, charge-off criteria, period past due	180 days
Minimum \| Real estate
Loans and Leases Receivable Disclosure [Line Items]
Number of months before updating collateral values on commercial real estate loans	6 months
Maximum \| Residential mortgage
Loans and Leases Receivable Disclosure [Line Items]
Number of months before updating exterior opinion on home valuation	6 months
Maximum \| Real estate
Loans and Leases Receivable Disclosure [Line Items]
Number of months before updating collateral values on commercial real estate loans	12 months
Consumer, excluding credit card
Loan balances by portfolio segment:
Total retained loans	294,979,000,000	288,449,000,000	292,620,000,000
Held-for-sale	395,000,000	614,000,000
At fair value	0	0
Loans	295,374,000,000	289,063,000,000
Consumer, excluding credit card \| Days Past Due, 30 or More
Loans and Leases Receivable Disclosure [Line Items]
Period past due, credit analysis factors, charge off criteria	30 days
Consumer, excluding credit card \| Minimum
Loans and Leases Receivable Disclosure [Line Items]
Number of payments under modified terms to recognize interest on cash basis	6
Credit card
Loan balances by portfolio segment:
Total retained loans	128,027,000,000	127,465,000,000	127,993,000,000
Held-for-sale	3,021,000,000	326,000,000
At fair value	0	0
Loans	131,048,000,000	127,791,000,000
Credit card \| Consumer Credit Card Financing Receivable
Loan balances by portfolio segment:
Total retained loans	128,027,000,000	127,465,000,000
Credit card \| Days Past Due, 90 or More \| Consumer Credit Card Financing Receivable
Loans and Leases Receivable Disclosure [Line Items]
Loans, charge-off criteria, period past due	90 days
Credit card \| Days Past Due, 30 or More \| Consumer Credit Card Financing Receivable
Loans and Leases Receivable Disclosure [Line Items]
Loans, charge-off criteria, period past due	30 days
Wholesale
Loan balances by portfolio segment:
Total retained loans	324,502,000,000	308,263,000,000	306,222,000,000
Held-for-sale	3,801,000,000	11,290,000,000
At fair value	2,611,000,000	2,011,000,000
Loans	330,914,000,000	321,564,000,000
Wholesale \| Real estate
Loan balances by portfolio segment:
Total retained loans	79,113,000,000	$ 69,151,000,000