Quarterly report pursuant to Section 13 or 15(d)

Securitizations and Other Variable Interest Entities - First Lien Mortgage Securitizations (Details)

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Securitizations and Other Variable Interest Entities - First Lien Mortgage Securitizations (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]          
Mortgage-backed securities, fair value $ 8,400   $ 8,400    
Residential Mortgage - Agency          
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]          
Proceeds from loan sales 1,698 $ 2,718 14,625 $ 6,020  
Gains (losses) on securitizations 3 8 724 23  
Repurchases from securitization trusts 68 209 363 695  
Gain (loss) on loans securitized 44 19 105 38  
Deconsolidation of securitizations   65 9,300 1,200  
Commercial Mortgage          
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]          
Proceeds from loan sales 945 1,360 3,237 4,541  
Gains (losses) on securitizations 17 28 57 73  
Repurchases from securitization trusts 0 0 0 0  
First Lien Mortgages          
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]          
Mortgage loans serviced for investors 172,500 201,300 172,500 201,300  
Servicing fees 101 $ 144 353 $ 436  
Transfers continuing involvement servicing fee advances 2,100   $ 2,100   $ 2,400
Other income | Residential Mortgage - Agency          
Securitization or Asset-backed Financing Arrangement, Financial Asset for which Transfer is Accounted as Sale [Line Items]          
Gains (losses) on securitizations $ 704