Annual report pursuant to Section 13 and 15(d)

Representations and Warranties Obligations and Corporate Guarantees - Additional Information (Details)

v3.6.0.2
Representations and Warranties Obligations and Corporate Guarantees - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Loss Contingencies [Line Items]    
New purchase claims $ 647  
New repurchase claims, deemed time-barred 440  
Claims resolved 734  
Claims resolved, deemed time-barred 477  
Unresolved repurchase claims, net of duplicated claims $ 18,277 $ 18,364
Inactive claims, threshold period of inactivity after denial 6 months  
Maximum    
Loss Contingencies [Line Items]    
Maximum estimated range of possible loss $ 1,500  
Representations and Warranties Exposure | Maximum    
Loss Contingencies [Line Items]    
Maximum estimated range of possible loss 2,000  
Sponsors of Third-Party Securitizations    
Loss Contingencies [Line Items]    
Unresolved repurchase claims, net of duplicated claims 1,300 1,400
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
Mortgage Loans Originated between 2004 and 2008 | 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 16,600 16,700
Mortgage Loans Originated between 2004 and 2008 | Private-Label Securitization Trustees    
Loss Contingencies [Line Items]    
Claims related to loans in specific private-label securitization groups $ 5,600 $ 3,500