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 ($)
$ in Millions
 1 Months Ended 12 Months Ended
Feb. 29, 2016
Dec. 31, 2016
Dec. 31, 2015
Bank of New York Mellon, as Trustee Settlement      
Loss Contingency Accrual [Roll Forward]      
Settlement payment $ 8,500    
Representations and Warranties Obligations and Corporate Guarantees      
Loss Contingency Accrual [Roll Forward]      
Additions for new sales   $ 4 $ 6
Payments   (9,097) (722)
Representations and Warranties Obligations and Corporate Guarantees | Mortgage Banking Income      
Loss Contingency Accrual [Roll Forward]      
Provision (benefit)   106 (39)
Representations and Warranties Obligations and Corporate Guarantees | Accrued Liabilities and Other Liabilities      
Loss Contingency Accrual [Roll Forward]      
Liability for representations and warranties and corporate guarantees, January 1   11,326 12,081
Liability for representations and warranties and corporate guarantees, December 31   $ 2,339 $ 11,326