Goodwill and Other Intangible Assets (Details Textuals) (USD $)	3 Months Ended
Mar. 31, 2011	Mar. 31, 2010
Goodwill and other intangible assets (Numeric) [Abstract]
Fairvalue resulting from changes in cost to service assumptions	$ 1,100,000,000
Commercial Real Estate, Fair Value, Period Increase (Decrease)	(2,000,000)	(2,000,000)
Commercial Real Estate, Fair Value	38,000,000	39,000,000
Decrease in other intangible asset	182,000,000
Indefinitely-lived intangibles related to asset management advisory contracts, not amortized	600,000,000
Amortization expense related to servicing assets on securitized automobile loans	$ 217,000,000

Fair value of commercial real estate at period end.

Name:	jpm_CommercialRealEstateFairValue
Namespace Prefix:	jpm
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Changes in the fair value of commercial real estate during the period.

+ Details

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

- Definition

Decrease in other intangible assets.

+ Details

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

- Definition

Goodwill And Intangible Assets Disclosure Numeric.

+ Details

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

- Definition

Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes InCost to service Assumptions.

+ Details

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

- Definition

Sum of the carrying amounts (original costs for current and prior period additions adjusted for impairment, if any) as of the balance sheet date of intangible assets, excluding goodwill, having a projected indefinite period of benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph b

+ Details

Name:	us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Decreases in the value of servicing assets due to the periodic mark down in value in proportion to and over the period of estimated net servicing income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 140

-Paragraph 17

-Subparagraph g(1)(d)

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number FAS140-4 and FIN46(R)-8

-Paragraph B10

-Subparagraph a(4)

+ Details

Name:	us-gaap_ServicingAssetAtAmortizedValueAmortization
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration