Goodwill and Other Intangible Assets - Key Economic Assumptions (Details 5) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended
Sep. 30, 2011	Dec. 31, 2010
Key economic assumptions used to determine the fair value of the Firm's Mortgage Servicing Rights (MSRs) [Abstract]
Weighted-average prepayment speed assumption (CPR)	19.81%	11.29%
Impact on fair value of 10% adverse change	$ (822)	$ (809)
Impact on fair value of 20% adverse change	(1,584)	(1,568)
Goodwill increase (decrease) during period	4.13%	3.94%
Impact on fair value of 100 basis points adverse change	(336)	(578)
Impact on fair value of 200 basis points adverse change	$ (645)	$ (1,109)

Mortgage Servicing Rights Msrs Fair Value Key Economic Assumptions Used To Determine.

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- Definition

Weighted-average option adjusted spread.

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- Definition

Impact on fair value of 100 basis points adverse change in the weighted-average option adjusted spread.

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- Definition

Impact on fair value of 200 basis points adverse change in the weighted-average option adjusted spread.

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- Definition

The hypothetical financial impact of a 10 percent adverse change of prepayment speed on the fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities) as of the balance sheet date.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 140

-Paragraph 17

-Subparagraph i(3)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6942082&loc=d3e107314-111719

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

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

-Paragraph B11

-Subparagraph b(5)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The hypothetical financial impact of a 20 percent adverse change of prepayment speed on the fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities) as of the balance sheet date.

+ References

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- Definition

A specified percentage variance in the prepayment speed assumption in the determination of fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities).

+ References

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