Quarterly report pursuant to Section 13 or 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 $)
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Guarantees [Abstract]        
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, beginning of year 14,076,000,000 15,746,000,000 19,021,000,000 15,858,000,000
Additions for new sales 12,000,000 6,000,000 22,000,000 11,000,000
(Charge-offs)/Recoveries (265,000,000) (204,000,000) (5,470,000,000) (603,000,000)
Provision 197,000,000 395,000,000 447,000,000 677,000,000
Liability for representations and warranties and corporate guarantees, end of period $ 14,020,000,000 $ 15,943,000,000 $ 14,020,000,000 $ 15,943,000,000