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 ($)
 1 Months Ended 3 Months Ended
Feb. 29, 2016
Mar. 31, 2016
Mar. 31, 2015
Loss Contingency Accrual [Roll Forward]      
Net reductions   $ (43,000,000) $ (65,000,000)
Maximum estimated range of possible loss   2,400,000,000.0  
Representations and Warranties Exposure      
Loss Contingency Accrual [Roll Forward]      
Maximum estimated range of possible loss   2,000,000,000  
Representations and Warranties Obligations and Corporate Guarantees      
Loss Contingency Accrual [Roll Forward]      
Additions for new sales   1,000,000 1,000,000
Net reductions   (8,557,000,000) (174,000,000)
Bank of New York Mellon, As Trustee Settlement      
Loss Contingency Accrual [Roll Forward]      
Litigation settlement $ 8,500,000,000    
Provision for Loan Lease and Other Losses | Representations and Warranties Obligations and Corporate Guarantees      
Loss Contingency Accrual [Roll Forward]      
Provision   42,000,000 84,000,000
Accrued Expenses And Other Liabilities | Representations and Warranties Obligations and Corporate Guarantees      
Loss Contingency Accrual [Roll Forward]      
Liability for representations and warranties and corporate guarantees, January 1   11,326,000,000 12,081,000,000
Liability for representations and warranties and corporate guarantees, March 31 (1)   $ 2,812,000,000 $ 11,992,000,000