Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Representations and Warranties Obligations and Corporate Guarantees (Details)

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Commitments and Contingencies - Representations and Warranties Obligations and Corporate Guarantees (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Loss Contingencies [Line Items]    
Claims related to loans in specific private-label securitization groups $ 14,400 $ 17,600
New purchase claims 283  
Time-barred repurchase claims 201  
Claims resolved 3,500  
Time-barred repurchase claims resolved 2,200  
Claims resolved by settlements 1,100  
Representations and Warranties Obligations and Corporate Guarantees    
Loss Contingencies [Line Items]    
Reserve for representations and warranties and corporate guarantees 2,000 1,900
Private-Label Securitization Trustees    
Loss Contingencies [Line Items]    
Claims related to loans in specific private-label securitization groups 6,200 $ 6,900
Monolines    
Loss Contingencies [Line Items]    
Unresolved repurchase claims, net of duplicated claims $ 1,500