Variable Interest Entities (Details 6) (USD $) In Millions	3 Months Ended
Mar. 31, 2011	Mar. 31, 2010
Summary of loan sale activities [Abstract]
Carrying value of loans sold	$ 39,247	$ 35,374
Proceeds received from loan sales as cash	340	336
Proceeds received from loan sales as securities	38,172	34,370
Total proceeds received from loan sales	38,512	34,706
Gains on loan sales	$ 22	$ 21

Cash proceeds received from the sale of originated and purchased mortgage loans.

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

- Definition

Proceeds received from the sale of originated and purchased mortgage loans.

+ Details

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

- Definition

Securities proeceeds received from the sale of originated and purchased mortgage loans.

+ Details

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

- Definition

Summary Of Loan Sale Activities.

+ Details

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

- Definition

The gains and losses included in earnings that represent the difference between the sale price and the carrying value of loans made to finance real estate acquisitions. This element refers to the gain (loss) and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

+ Details

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

- Definition

The carrying amount of mortgage loans on real estate that were sold during the reporting period.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph c

-Subparagraph Schedule IV

-Article 5

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 29

-Article 12

+ Details

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