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 ($)
$ in Millions
 1 Months Ended 3 Months Ended 6 Months Ended
Feb. 29, 2016
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
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   $ 1 $ 1 $ 2 $ 2
Payments   (45) (107) (88) (8,664)
Representations and Warranties Obligations and Corporate Guarantees | Mortgage Banking Income          
Loss Contingency Accrual [Roll Forward]          
Provision (benefit)   (2) 17 (5) 59
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, beginning of period   2,294 2,812 2,339 11,326
Liability for representations and warranties and corporate guarantees, December 31   $ 2,248 $ 2,723 $ 2,248 $ 2,723