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Parent Company - Supplemental Information (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Long-term Debt, Fiscal Year Maturity [Abstract]      
2015 $ 38,382,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths    
2016 50,000,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo    
2017 42,000,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree    
2018 35,300,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour    
2019 28,200,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive    
JPMorgan Chase & Co.      
Long-term Debt, Fiscal Year Maturity [Abstract]      
2015 24,437,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
2016 25,500,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
2017 23,000,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
2018 19,300,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
2019 11,300,000,000us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
   
Subsidiaries | JPMorgan Chase & Co.      
Condensed Financial Statements, Captions [Line Items]      
Dividends from guaranteed capital debt securities $ 2,000,000jpm_DividendsFromGuaranteedCapitalDebtSecurities
/ jpm_IntercompanyTransactionsBySubsidiaryAxis
= us-gaap_SubsidiariesMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
$ 5,000,000jpm_DividendsFromGuaranteedCapitalDebtSecurities
/ jpm_IntercompanyTransactionsBySubsidiaryAxis
= us-gaap_SubsidiariesMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember
$ 12,000,000jpm_DividendsFromGuaranteedCapitalDebtSecurities
/ jpm_IntercompanyTransactionsBySubsidiaryAxis
= us-gaap_SubsidiariesMember
/ dei_LegalEntityAxis
= us-gaap_ParentCompanyMember