Annual report pursuant to Section 13 and 15(d)

Representations and Warranties Obligations and Corporate Guarantees - Liabilities (Details)

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Representations and Warranties Obligations and Corporate Guarantees - Liabilities (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Guarantor Obligations [Line Items]    
Representations Warranties And Guarantees Maximum Exposure Above Existing Accruals $ 4,000,000,000  
Liability For Representations Warranties And Guarantees [Roll Forward]    
Liability for representations and warranties and corporate guarantees, January 1 19,021,000,000 15,858,000,000
Additions for new sales 36,000,000 28,000,000
Net reductions (6,615,000,000) (804,000,000)
Provision 840,000,000 3,939,000,000
Liability for representations and warranties and corporate guarantees, December 31 13,282,000,000 19,021,000,000
Repurchase Demands Received Excluded from Outstanding Claims 273,000,000  
Other Non Government Sponsored Entites [Member]
    
Liability For Representations Warranties And Guarantees [Roll Forward]    
Repurchase Demands Excluded from Outstanding Claims 14,600,000,000  
Outstanding Claims For Representations And Warranties Unpaid Principal Balance 17,900,000,000  
Repurchase Demands under Review $ 3,300,000,000