Allowance For Credit Losses (Details Textuals) (USD $) In Millions	12 Months Ended
Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Allowance for Credit Losses Loans (Numeric) [Abstract]
Asset-specific consumer excluding credit card allowance for loan losses included in troubled-debt restructurings	$ 985	$ 754	$ 258
Net charge-offs	25,782	24,018	10,764
Impaired collateral dependent loans at fair value, less cost to sell	1,696	1,337	1,065
Impaired collateral-dependent loans [Member]
Allowance for Credit Losses Loans (Numeric) [Abstract]
Net charge-offs	573	666	146
Firm-sponsored credit card trusts [Member]
Allowance for Credit Losses Loans (Numeric) [Abstract]
Cumulative effect of change in accounting principles on the Allowance for loan losses		7,400
Firm-administered multi-seller conduits [Member]
Allowance for Credit Losses Loans (Numeric) [Abstract]
Cumulative effect of change in accounting principles on the Allowance for loan losses		14
Mortgage securitization entities [Member]
Allowance for Credit Losses Loans (Numeric) [Abstract]
Cumulative effect of change in accounting principles on the Allowance for loan losses		$ 127

Allowance For Credit Losses Loans.

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- Definition

Consumer asset specific allowance for loan losses on residential real estate restructured loans.

+ Details

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Namespace Prefix:	jpm
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Cumulative Effect Of Change In Accounting Principles Allowance For Loan Losses.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Reflects the carrying amount of impaired collateral dependent loans at fair value less cost to sell.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Reflects the amount of loans and leases that have been removed, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 114

-Paragraph 20

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Subparagraph d

-Article 9

+ Details

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