The contractual amount of off-balance sheet lending-related financial instruments (e.g., commitments and guarantees), which represents the maximum possible credit risk should the counterparty draw upon the commitment or the entity be required to fulfill its obligation under the guarantee, and the counterparty subsequently fail to perform according to the terms of the contract.

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Balance Type:	credit
Period Type:	instant

- Definition

Collateral held relating to other letters of credit.

+ Details

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

- Definition

Standby letters of credit and other financial guarantees and other letters of credit.

+ Details

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Period Type:	duration

- Definition

Standby letters of credit and other financial guarantees which are rated as investment-grade per company defined internal payment/performance risk groupings used for managing risk.

+ Details

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

- Definition

Standby letters of credit and other financial guarantees which are rated as noninvestment-grade per company defined internal payment/performance risk groupings used for managing risk.

+ Details

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

- Definition

Collateral held relating to standby letters of credit.

+ Details

Name:	jpm_StandbyLettersOfCreditCollateralHeld
Namespace Prefix:	jpm
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

+ Details

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Off-Balance Sheet Lending-Related Financial Instruments, Guarantees and Other Commitments (Details 1) (USD $) In Millions	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2007
Standby letters of credit and other financial guarantees and other letters of credit [Abstract]
Total contractual amount	$ 954,840	$ 991,095	$ 1,121,378
Allowance for lending-related commitments	717	939	659	850
Commitments with collateral	37,800	31,500
Wholesale [Member]
Standby letters of credit and other financial guarantees and other letters of credit [Abstract]
Total contractual amount	346,079	347,155
Standby Letters of Credit, and Other Financial Guarantees [Member]
Standby letters of credit and other financial guarantees and other letters of credit [Abstract]
Investment-grade	70,236	66,786
Noninvestment-grade	24,601	24,699
Total contractual amount	94,837	91,485
Allowance for lending-related commitments	345	552
Commitments with collateral	37,815	31,454
Other Letters of Credit [Member]
Standby letters of credit and other financial guarantees and other letters of credit [Abstract]
Investment-grade	5,289	3,861
Noninvestment-grade	1,374	1,306
Total contractual amount	6,663	5,167
Allowance for lending-related commitments	2	1
Commitments with collateral, other letters of credit	$ 2,127	$ 1,315