Securitization Activities (Details 1) (USD $)	6 Months Ended	12 Months Ended
Jun. 30, 2011	Dec. 31, 2010
Weighted average key economic assumptions used in measuring the fair value of the firms retained interests [Abstract]
Fair value of retained interests	$ 5,682,000,000	$ 6,965,000,000
Securitization Activities (Textuals) [Abstract]
Net Liability related to Other Continuing Involvement	85,000,000	98,000,000
Outstanding principal amount related to securitization entities in which the firm's only continuing involvement is retained servicing	6,860,000,000	7,640,000,000
Fair value of retained interests related to securitization entities in which the firm's only continuing involvement is retained servicing	16,000,000	16,000,000
Maximum Exposure To Adverse Changes in the value of retained interests relating to Other Asset Backed Securities	61,000,000	62,000,000
CDOs, CLOs and others [Member]
Weighted average key economic assumptions used in measuring the fair value of the firms retained interests [Abstract]
Fair value of retained interests	61,000,000	62,000,000
Weighted average life years	3.8	4.2
Mortgage Backed Securities [Member]
Weighted average key economic assumptions used in measuring the fair value of the firms retained interests [Abstract]
Fair value of retained interests	5,621,000,000	6,903,000,000
Weighted average life years	6.3	7.4
Constant prepayment rate	9.10%	11.60%
Impact of 10% adverse change	(36,000,000)	(62,000,000)
Impact of 20% adverse change	(69,000,000)	(128,000,000)
Discount rate	4.60%	5.30%
Impact of 10% adverse change	(114,000,000)	(175,000,000)
Impact of 20% adverse change	$ (223,000,000)	$ (341,000,000)

Fair value of retained interests related to securitization entities in which the firm's only continuing involvement is retained servicing.

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- Definition

Maximum exposure to adverse changes in the value of retained interests relating to other asset backed securities.

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- Definition

The firms net liability due to its other continuing involvement in the form of derivative transactions and guarantees with certain non-consolidated VIEs.

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- Definition

Outstanding principal amount related to securitization entities in which the firm's only continuing involvement is retained servicing.

+ Details

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- Definition

Securitization Activities.

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- Definition

Weighted average key economic assumptions used in measuring the fair value of the firms retained interests [Abstract].

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- Definition

The discount rate which is used to value residual cash flows generated by financial assets of the securitization or asset-backed financing arrangement. This is used as a key assumption in measuring the fair value of assets or liabilities that relate to a transferor's continuing involvement (including interests that continue to be held by the transferor and servicing assets or servicing liabilities), if any, as of the date of the latest statement of financial position presented.

+ 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 B11
-Subparagraph b(3)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 17
-Subparagraph i(2)

+ Details

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- Definition

Estimated speed of prepayments of principal on financial assets. This is used as a key assumption in measuring the fair value of assets or liabilities that relate to a transferor's continuing involvement (including interests that continue to be held by the transferor and servicing assets or servicing liabilities), if any, as of the date of the latest statement of financial position presented.

+ References

+ Details

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- Definition

The weighted average life of securitized assets. This is used as a key input and assumption in measuring the fair value of assets or liabilities that relate to a transferor's continuing involvement (including interests that continue to be held by the transferor and servicing assets or servicing liabilities), if any, as of the date of the latest statement of financial position presented.

+ References

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents the interests continued to be held by a transferor (retained or residual interest) after transferring financial assets to a third party.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 4, 58, 59

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 7

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- Definition

The hypothetical financial impact of a 10 percent adverse change of the discount rate on the fair value of interests that continue to be held by the transferor, servicing assets, or servicing liabilities as of the balance sheet date.

+ 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 B11
-Subparagraph b(5)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 17
-Subparagraph i(3)

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- Definition

The hypothetical financial impact of a 10 percent adverse change of prepayment speed on the fair value of interests that continue to be held by the transferor, servicing assets, or servicing liabilities as of the balance sheet date.

+ 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 B11
-Subparagraph b(5)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 17
-Subparagraph i(3)

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- Definition

The hypothetical financial impact of a 20 percent adverse change of the discount rate on the fair value of interests that continue to be held by the transferor, servicing assets, or servicing liabilities as of the balance sheet date.

+ 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 B11
-Subparagraph b(5)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 17
-Subparagraph i(3)

+ Details

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- Definition

The hypothetical financial impact of a 20 percent adverse change of prepayment speed on the fair value of interests that continue to be held by the transferor, servicing assets, or servicing liabilities as of the balance sheet date.

+ 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 B11
-Subparagraph b(5)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 140
-Paragraph 17
-Subparagraph i(3)

+ Details

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