Fair Value Measurement (Details 5) (USD $) In Millions	12 Months Ended
Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Impact of credit adjustments on earnings [Abstract]
Derivatives CVA	$ (665)	$ 5,869	$ (7,561)
Derivatives DVA	41	(548)	789
Structured notes DVA	468	(1,748)	1,211
Trading assets and liabilities average balances [Abstract]
Trading assets - debt and equity instruments	354,441	318,063	384,102
Trading assets - derivative receivables	84,676	110,457	121,417
Trading liabilities - debt and equity instruments	78,159	60,224	78,841
Trading liabilities - derivative payables	$ 65,714	$ 77,901	$ 93,200

- Definition

This element represents the impact of derivative payables debit (credit risk) valuation adjustments on earnings, excluding the effect of any hedging activity.

+ Details

Name:	jpm_CreditAdjustmentDerivativePayablesDva
Namespace Prefix:	jpm
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This element represents the impact of derivative receivables credit valuation adjustments on earnings, excluding the effect of any hedging activity.

+ Details

Name:	jpm_CreditAdjustmentsDerivativeReceivablesCreditValuationAdjustments
Namespace Prefix:	jpm
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This element represents the impact of structured notes debit (credit risk) valuation adjustments on earnings, excluding the effect of any hedging activity.

+ Details

Name:	jpm_CreditAdjustmentsStructuredNotesDva
Namespace Prefix:	jpm
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Impact of credit adjustments on earnings.

+ Details

Name:	jpm_ImpactOfCreditAdjustmentsOnEarningsAbstract
Namespace Prefix:	jpm
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Trading assets and liabilities average balances.

+ Details

Name:	jpm_TradingAssetsAndLiabilitiesAverageBalancesAbstract
Namespace Prefix:	jpm
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents average trading assets - debt and equity instruments.

+ Details

Name:	jpm_TradingAssetsDebtAndEquityInstruments
Namespace Prefix:	jpm
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This element represents average trading assets - derivative receivables.

+ Details

Name:	jpm_TradingAssetsDerivativeReceivables
Namespace Prefix:	jpm
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This element represents average trading liabilities - debt and equity instruments.

+ Details

Name:	jpm_TradingLiabilitiesDebtAndEquityInstruments
Namespace Prefix:	jpm
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This element represents average trading liabilities - derivative payables.

+ Details

Name:	jpm_TradingLiabilitiesDerivativePayables
Namespace Prefix:	jpm
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration