Quarterly report pursuant to Section 13 or 15(d)

Representations and Warranties Obligations and Corporate Guarantees - Litigation Settlement (Details)

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Representations and Warranties Obligations and Corporate Guarantees - Litigation Settlement (Details) (Syncora Holdings Ltd [Member], Syncora Litigation Settlement [Member], USD $)
 0 Months Ended
Jul. 17, 2012
Trust
Jun. 30, 2012
Syncora Holdings Ltd [Member] | Syncora Litigation Settlement [Member]
    
Guarantor Obligations [Line Items]    
Number of First Lien R M B S Trusts with Outstanding or Potential Repurchase Claims 8  
Number of Second Lien RMBS Trusts With Outstanding or Potential Repurchase Claims 6  
Number of Second Lien R M B S Trusts Included in Litigation 5  
Number of First and Second Lien R M B S Trusts Not in Litigation But Included in Settlement 9  
Original Principal Balance of First Lien Mortgages Included in Settlement Agreement $ 9,600,000,000  
Original Principal Balance of Second Lien Mortgages Included in Settlement Agreement 7,700,000,000  
Principal Balance of Loans in First Lien Trusts That Have Defaulted or are 180 Days or More Past Due   3,000,000,000
Principal Balance of Loans in Second Lien Trusts That Have Defaulted or are 180 Days or More Past Due   1,400,000,000
Litigation Settlement to be Paid in Cash 375,000,000  
Loss Contingency, Settlement Agreement, Consideration   $ 400,000,000