Financing Receivable, Modifications, Percentage of Modifications

No definition available.

Name:	jpm_FinancingReceivableModificationsPercentageofModifications
Namespace Prefix:	jpm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

In a group of items by type, the percentage that the sum of the items may exceed due to the inclusion of some items in more than one category. For example, in loan modifications, some loans may have more than one type of concession granted on the loan, so a sum of all types of loan modifications granted would exceed 100%.

+ References

No definition available.

+ Details

Name:	jpm_PercentageSumOfItemsByTypeMayExceed
Namespace Prefix:	jpm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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

Name:	us-gaap_FinancingReceivableImpairedLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 33
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953676-111524

+ Details

Name:	us-gaap_FinancingReceivableModificationsNumberOfContracts2
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=jpm_ConsumerExcludingCreditCardLoanPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=jpm_TrialModificationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=jpm_PermanentModificationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_ContractualInterestRateReductionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=jpm_TermorPaymentExtensionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_PaymentDeferralMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_PrincipalForgivenessMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=jpm_OtherModificationsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

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

Loans - Consumer, Excluding Credit Card Loan Portfolio, Loan Modifications, Nature and Extent of Modifications (Details) - Consumer, excluding credit card - loan	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Financing Receivable, Impaired [Line Items]
Percentage, sum of items by type, may exceed			100.00%
Total residential real estate – excluding PCI \| Trial Modification
Financing Receivable, Impaired [Line Items]
Number of loans modified	1,099	742	3,684	2,896
Total residential real estate – excluding PCI \| Permanent Modification
Financing Receivable, Impaired [Line Items]
Number of loans modified	1,658	1,738	6,379	5,980
Total residential real estate – excluding PCI \| Interest rate reduction
Financing Receivable, Impaired [Line Items]
Concession granted	69.00%	61.00%	49.00%	69.00%
Total residential real estate – excluding PCI \| Term or payment extension
Financing Receivable, Impaired [Line Items]
Concession granted	86.00%	70.00%	57.00%	80.00%
Total residential real estate – excluding PCI \| Principal and/or interest deferred
Financing Receivable, Impaired [Line Items]
Concession granted	19.00%	12.00%	31.00%	13.00%
Total residential real estate – excluding PCI \| Principal forgiveness
Financing Receivable, Impaired [Line Items]
Concession granted	8.00%	19.00%	7.00%	14.00%
Total residential real estate – excluding PCI \| Other
Financing Receivable, Impaired [Line Items]
Concession granted	49.00%	27.00%	52.00%	21.00%
Residential mortgage \| Trial Modification
Financing Receivable, Impaired [Line Items]
Number of loans modified	513	206	1,789	1,052
Residential mortgage \| Permanent Modification
Financing Receivable, Impaired [Line Items]
Number of loans modified	719	510	2,374	1,952
Residential mortgage \| Interest rate reduction
Financing Receivable, Impaired [Line Items]
Concession granted	58.00%	64.00%	36.00%	73.00%
Residential mortgage \| Term or payment extension
Financing Receivable, Impaired [Line Items]
Concession granted	83.00%	80.00%	49.00%	84.00%
Residential mortgage \| Principal and/or interest deferred
Financing Receivable, Impaired [Line Items]
Concession granted	30.00%	22.00%	47.00%	16.00%
Residential mortgage \| Principal forgiveness
Financing Receivable, Impaired [Line Items]
Concession granted	9.00%	17.00%	7.00%	18.00%
Residential mortgage \| Other
Financing Receivable, Impaired [Line Items]
Concession granted	36.00%	15.00%	40.00%	24.00%
Home equity \| Trial Modification
Financing Receivable, Impaired [Line Items]
Number of loans modified	586	536	1,895	1,844
Home equity \| Permanent Modification
Financing Receivable, Impaired [Line Items]
Number of loans modified	939	1,228	4,005	4,028
Home equity \| Interest rate reduction
Financing Receivable, Impaired [Line Items]
Concession granted	77.00%	60.00%	57.00%	68.00%
Home equity \| Term or payment extension
Financing Receivable, Impaired [Line Items]
Concession granted	88.00%	66.00%	62.00%	78.00%
Home equity \| Principal and/or interest deferred
Financing Receivable, Impaired [Line Items]
Concession granted	11.00%	8.00%	22.00%	12.00%
Home equity \| Principal forgiveness
Financing Receivable, Impaired [Line Items]
Concession granted	7.00%	19.00%	7.00%	12.00%
Home equity \| Other
Financing Receivable, Impaired [Line Items]
Concession granted	58.00%	32.00%	58.00%	19.00%