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Securitizations and Variable Interests Entities - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Servicing Assets at Fair Value [Line Items]      
Average period to securitization 30 days    
Financing Receivable, Threshold Period Past Due 60 days 60 days  
Ginnie Mae      
Servicing Assets at Fair Value [Line Items]      
Percentage of transferred residential loans serviced 60 days or more past due 8.30% 12.00%  
Financing Receivable, Threshold Period Past Due 60 days    
Forward Loans      
Servicing Assets at Fair Value [Line Items]      
MSRs retained $ 234.7 $ 222.7 $ 68.7
Percentage of transferred residential loans serviced 60 days or more past due 2.50% 3.60%