Annual report pursuant to Section 13 and 15(d)

Representations and Warranties Obligations and Corporate Guarantees - Unresolved Repurchase Claims by Counterparty, net of duplicate claims (Details)

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Representations and Warranties Obligations and Corporate Guarantees - Unresolved Repurchase Claims by Counterparty, net of duplicate claims (Details) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Loss Contingencies [Line Items]    
Unresolved repurchase claims, net of duplicated claims $ 18,277 $ 18,364
Outstanding claims with review 11,900 11,900
Outstanding claims without review 4,800 4,800
Private-label securitization trustees, whole-loan investors, including third-party securitization sponsors and other    
Loss Contingencies [Line Items]    
Unresolved repurchase claims, net of duplicated claims 16,685 16,748
Monolines    
Loss Contingencies [Line Items]    
Unresolved repurchase claims, net of duplicated claims 1,583 1,599
GSEs    
Loss Contingencies [Line Items]    
Unresolved repurchase claims, net of duplicated claims $ 9 $ 17