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Representations and Warranties Obligations and Corporate Guarantees - Outstanding Claims (Details) (USD $)
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3 Months Ended | 12 Months Ended | ||||||||||||
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Mar. 31, 2014
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Dec. 31, 2013
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| Guarantor Obligations [Line Items] | ||||||||||||||
| Outstanding Claims By Product Type | $ 20,264,000,000 | [1],[2] | $ 19,655,000,000 | [1],[2] | ||||||||||
| Loss On Repurchase Or Reimbursement Of Repurchase Claims For First Lien Mortgages And Home Equity Loans From The Investor Or Securitization Trust | 1,200,000,000 | 1,200,000,000 | ||||||||||||
| Outstanding Claims by Product Type, with Review | 13,500,000,000 | 13,800,000,000 | ||||||||||||
| Outstanding Claims by Product Type, without Review | 5,100,000,000 | 4,100,000,000 | ||||||||||||
| New Purchase Claims | 1,300,000,000 | |||||||||||||
| Private Label Securitization Trust Related Repurchase Claims | 1,100,000,000 | |||||||||||||
| Amount of Loan Repurchase Claims Resolved | 726,000,000 | |||||||||||||
| Amount of Loan Repurchase Claims Resolved Through Rescission | 162,000,000 | |||||||||||||
| Amount of Loan Repurchase Claims Resolved Through Repurchase and Make Whole Payments | 177,000,000 | |||||||||||||
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Prime loans [Member]
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| Guarantor Obligations [Line Items] | ||||||||||||||
| Outstanding Claims By Product Type | 602,000,000 | [1] | 623,000,000 | [1] | ||||||||||
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Alt [Member]
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| Guarantor Obligations [Line Items] | ||||||||||||||
| Outstanding Claims By Product Type | 2,243,000,000 | [1] | 2,259,000,000 | [1] | ||||||||||
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Home Equity [Member]
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| Guarantor Obligations [Line Items] | ||||||||||||||
| Outstanding Claims By Product Type | 1,896,000,000 | [1] | 1,905,000,000 | [1] | ||||||||||
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Pay option [Member]
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| Guarantor Obligations [Line Items] | ||||||||||||||
| Outstanding Claims By Product Type | 5,520,000,000 | [1] | 5,780,000,000 | [1] | ||||||||||
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Subprime [Member]
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| Guarantor Obligations [Line Items] | ||||||||||||||
| Outstanding Claims By Product Type | 9,932,000,000 | [1] | 8,928,000,000 | [1] | ||||||||||
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Other Product Type [Member]
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| Guarantor Obligations [Line Items] | ||||||||||||||
| Outstanding Claims By Product Type | 71,000,000 | [1] | 160,000,000 | [1] | ||||||||||
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Monoline [Member]
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| Guarantor Obligations [Line Items] | ||||||||||||||
| Outstanding Claims By Counterparty | 1,536,000,000 | [1],[3] | 1,532,000,000 | [1],[3] | ||||||||||
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Government sponsored enterprise obligations [Member]
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| Guarantor Obligations [Line Items] | ||||||||||||||
| Outstanding Claims By Counterparty | 124,000,000 | [1] | 170,000,000 | [1] | ||||||||||
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Whole loan sale, private-label securitizations and other [Member]
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| Guarantor Obligations [Line Items] | ||||||||||||||
| Outstanding Claims By Counterparty | 18,604,000,000 | [1],[2],[4],[5] | 17,953,000,000 | [1],[2],[4],[5] | ||||||||||
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Total unresolved repurchase claims [Member]
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| Guarantor Obligations [Line Items] | ||||||||||||||
| Outstanding Claims By Counterparty | 20,264,000,000 | [1],[2] | 19,655,000,000 | [1],[2] | ||||||||||
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Bank Of New York Mellon As Trustee [Member]
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| Guarantor Obligations [Line Items] | ||||||||||||||
| Repurchase Demands Received Excluded from Outstanding Claims | 273,000,000 | |||||||||||||
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Whole loan sale, private-label securitizations and other [Member]
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| Guarantor Obligations [Line Items] | ||||||||||||||
| Repurchase Demands Received Excluded from Outstanding Claims | 952,000,000 | |||||||||||||
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Government sponsored enterprise obligations [Member]
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| Guarantor Obligations [Line Items] | ||||||||||||||
| New Purchase Claims | 153,000,000 | |||||||||||||
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Whole-Loan Investors [Member]
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| Guarantor Obligations [Line Items] | ||||||||||||||
| New Purchase Claims | 30,000,000 | |||||||||||||
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Federal Housing Finance Agency (FHFA) [Member]
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| Guarantor Obligations [Line Items] | ||||||||||||||
| Resolution of unresolved repurchase claims | 387,000,000 | |||||||||||||
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FGIC Settlement [Member]
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| Guarantor Obligations [Line Items] | ||||||||||||||
| Outstanding monoline repurchase claims resolved | $ 450,000,000 | |||||||||||||
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