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, 2019
Dec. 31, 2018
Loss Contingencies [Line Items]    
Claims related to loans in specific private-label securitization groups $ 10,700 $ 14,400
New purchase claims 461  
Claims resolved 4,200  
Time-barred repurchase claims resolved 2,100  
Representations and Warranties Obligations and Corporate Guarantees    
Loss Contingencies [Line Items]    
Reserve for representations and warranties and corporate guarantees 1,800 2,000
Private-Label Securitization Trustees    
Loss Contingencies [Line Items]    
Claims related to loans in specific private-label securitization groups 3,700 $ 6,200
Monolines    
Loss Contingencies [Line Items]    
Claims related to loans in specific private-label securitization groups $ 1,600