Loan Sale and Servicing Activities and Variable Interest Entities (Narrative) (Details) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Loan Sale and Servicing Activities and Variable Interest Entities [Abstract]
Balance of removal of account provisions asset and liability	$ 272,000,000	$ 336,000,000
Liquidity facilities fund obligations	7,200,000,000
Requirement to fund amount of liquidity facilities regardless of whether underlying assets default	1,400,000,000
Percentage of program level credit enhancement to cover net losses	10.00%
Percentage of enhancement provided in form of cash collateral account funded by loan facility	100.00%
Date facility expires	June 2016
Amount outstanding on facility	$ 750,000,000

Amount Outstanding On Facility

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- Definition

Certain loans transferred to the Agencies contain removal of account provisions (ROAPs). Under these ROAPs, we hold an option to repurchase at par individual delinquent loans that meet certain criteria. When we have the unilateral ability to repurchase a delinquent loan, effective control over the loan has been regained and we recognize the loan and a corresponding liability on the balance sheet regardless of our intent to repurchase the loan.

+ Details

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- Definition

Date Facility Expires

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- Definition

Liquidity Facilities Fund Obligations

+ Details

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- Definition

Loan Sale and Servicing Activities and Variable Interest Entities

+ Details

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- Definition

Percentage Of Enhancement Provided In Form Of Cash Collateral Account Funded By Loan Facility

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- Definition

Percentage Of Program Level Credit Enhancement To Cover Net Losses

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- Definition

Requirement To Fund Amount Of Liquidity Facilities Regardless of Whether the Underlying Assets Default

+ Details

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