v3.25.2
SECURITIZATIONS AND VARIABLE INTEREST ENTITIES - Mortgage Servicing Rights (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Personal installment loan          
Classification of Securitizations          
Principal securitized $ 300,000,000        
Proceeds from new securitizations     $ 600,000,000    
Gains recognized on the securitization 500,000,000   700,000,000    
Mortgage servicing rights          
Classification of Securitizations          
Principal amount of loans and other financial instruments 57,000,000,000 $ 53,000,000,000 57,000,000,000 $ 53,000,000,000  
MSR fees          
Servicing fees 38,000,000 33,000,000 75,000,000 65,000,000  
Late fees 0 1,000,000 1,000,000 1,000,000  
Total MSR fees 38,000,000 34,000,000 76,000,000 66,000,000  
Mortgage securitizations - Non-agency-sponsored          
Classification of Securitizations          
Principal securitized 1,400,000,000 3,000,000,000.0 2,800,000,000 4,100,000,000  
Proceeds from new securitizations 1,000,000,000.0 2,700,000,000 2,300,000,000 3,700,000,000  
Gains recognized on the securitization 34,700,000 45,500,000 95,500,000 82,000,000  
Re-securitizations          
Fair value of re-securitizations deals in which the entity holds a retained interest 0   0   $ 0
Mortgage securitizations - U.S. agency-sponsored          
Re-securitizations          
Fair value of re-securitizations deals in which the entity holds a retained interest 2,500,000,000   2,500,000,000   1,600,000,000
Securities transferred to re-securitization entities 6,700,000,000 $ 6,300,000,000 13,600,000,000 $ 10,700,000,000  
Market value of retained interest related to re-securitization transaction 1,600,000,000   1,600,000,000   977,000,000
Original fair value of re-securitizations deals in which the entity holds a retained interest $ 73,400,000,000   $ 73,400,000,000   $ 76,800,000,000