Mortgage Repurchase Liability [Abstract]

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- Definition

Summary of changes in repurchase liability.

+ Details

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- Definition

Valuation allowances and reserves current year provision.

+ Details

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- Definition

Total probable recoveries from third parties which is netted against the liabilities established to represent expected future costs.

+ Details

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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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690

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- Definition

Total of the deductions in a given period to 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, representing receivables written off as uncollectible and portions of the reserves utilized, respectively.

+ References

+ Details

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Off-Balance Sheet Lending-Related Financial Instruments, Guarantees and Other Commitments - Changes in Repurchase Liability (Details 2) (USD $) In Millions					3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended
	Sep. 30, 2011	Dec. 31, 2010	Sep. 30, 2010	Dec. 31, 2009	Sep. 30, 2011 Mortgage Repurchase Liability [Member]	Sep. 30, 2010 Mortgage Repurchase Liability [Member]	Sep. 30, 2011 Mortgage Repurchase Liability [Member]	Sep. 30, 2010 Mortgage Repurchase Liability [Member]	Dec. 31, 2010 Mortgage Repurchase Liability [Member]	Sep. 30, 2011 Repurchase Make-Whole Settlements [Member]	Sep. 30, 2010 Repurchase Make-Whole Settlements [Member]	Sep. 30, 2011 Repurchase Make-Whole Settlements [Member]	Sep. 30, 2010 Repurchase Make-Whole Settlements [Member]
Mortgage repurchase liability
Repurchase liability, net of probable recoveries from third party correspondents	$ 686	$ 717	$ 873	$ 939	$ 3,616	$ 3,307	$ 3,616	$ 3,307
Probable recoveries from third-party correspondents					575		575		517
Summary of changes in mortgage repurchase liability
Valuation allowances and reserves at beginning of period	686	717	873	939	3,631	2,332	3,285	1,705
Realized losses					(329)	(489)	(801)	(1,052)		(162)	(225)	(403)	(480)
Provision for repurchase losses					314	1,464	1,132	2,654
Valuation allowances and reserves at end of period	$ 686	$ 717	$ 873	$ 939	$ 3,616	$ 3,307	$ 3,616	$ 3,307