Quarterly report pursuant to Section 13 or 15(d)

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

v3.7.0.1
Representations and Warranties Obligations and Corporate Guarantees - Additional Information (Details)
$ in Millions
 3 Months Ended
Mar. 31, 2017
USD ($)
monoline_insurer
Dec. 31, 2016
USD ($)
Loss Contingencies [Line Items]    
Number of monoline insurers | monoline_insurer 4  
New purchase claims $ 24  
Claims resolved 36  
Unresolved repurchase claims, net of duplicated claims $ 18,265 $ 18,277
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 1,300
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 16,678 16,685
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 0
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 $ 5,600