Variable Interest Entities (Details 5) (Non consolidated municipal bond vehicles [Member], USD $)	12 Months Ended
Dec. 31, 2010	Dec. 31, 2009
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Fair value of assets held by VIEs	$ 13,700,000,000	$ 13,200,000,000
Excess/ -deficit	4,900,000,000	4,800,000,000
Maximum exposure	8,800,000,000	8,400,000,000
Weighted-average expected life of assets (years)	15.5	10.1
Other Unfunded Commitments to Extend Credit [Member]
Firm's exposure to nonconsolidated municipal bond VIEs [Abstract]
Liquidity facilities	$ 8,800,000,000	$ 8,400,000,000

Firm's exposure to nonconsolidated municipal bond VIEs.

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- Definition

The unused portion of a line of credit that is available to the Wholesale borrower to withdrawn upon.

+ Details

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- Definition

The carrying amount of the assets in the enterprise's statement of financial position that relate to the enterprise's variable interest in the unconsolidated variable interest entity. In general, a VIE is a corporation, partnership, trust, or any other legal structure used for business purposes that either (a) does not have equity investors with voting rights or (b) has equity investors that do not provide sufficient financial resources for the entity to support its activities. A VIE often holds financial assets, including loans or receivables, real estate or other property. A VIE may be essentially passive or it may engage in research and development or other activities on behalf of another company.

+ Details

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- Definition

Variable Interest Entity, Weighted-Average Expected Life of Assets, Unconsolidated VIE.

+ Details

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- Definition

Discloses the difference between the carrying amount of the liability and the enterprise's maximum exposure to loss.

+ References

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

-Publisher FASB

-Name FASB Staff Position (FSP)

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

-Paragraph C6

-Subparagraph c

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- Definition

Quantifies the entity's maximum exposure to loss.

+ References

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

-Publisher FASB

-Name FASB Staff Position (FSP)

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

-Paragraph C6

-Subparagraph c

+ Details

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