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Fair Value Measurements - Unobservable Inputs (Details) - USD ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Min | MSR(1)    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Option adjusted spread(2) 6.90%  
Discount rate   10.40%
Prepayment speed 6.80% 6.30%
Cost to service per loan(3) $ 56 $ 54
Min | Mortgage loans held for sale    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Market pricing $ 0.450 $ 0.373
Min | IRLCs    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Value of servicing (reflected as a percentage of loan commitment) 0.011 (0.006)
Min | Excess spread financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Option adjusted spread(2) 7.00%  
Discount rate   10.00%
Prepayment speed 7.70% 6.90%
Min | Mortgage servicing rights financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Advance financing and counterparty fee rates 6.60% 5.20%
Annual advance recovery rates 12.20% 15.90%
Max | MSR(1)    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Option adjusted spread(2) 12.30%  
Discount rate   13.70%
Prepayment speed 9.30% 12.20%
Cost to service per loan(3) $ 160 $ 155
Max | Mortgage loans held for sale    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Market pricing $ 1.034 $ 1.147
Max | IRLCs    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Value of servicing (reflected as a percentage of loan commitment) 0.035 0.039
Max | Excess spread financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Option adjusted spread(2) 12.30%  
Discount rate   13.80%
Prepayment speed 9.10% 13.30%
Max | Mortgage servicing rights financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Advance financing and counterparty fee rates 9.20% 8.60%
Annual advance recovery rates 14.80% 20.60%
Weighted Average | MSR(1)    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Option adjusted spread(2) 8.00%  
Discount rate   11.40%
Prepayment speed 7.50% 7.20%
Cost to service per loan(3) $ 80 $ 80
Average life(4) 7 years 10 months 24 days 8 years 1 month 6 days
Weighted Average | Mortgage loans held for sale    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Market pricing $ 0.811 $ 0.774
Weighted Average | IRLCs    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Value of servicing (reflected as a percentage of loan commitment) 0.019 0.023
Weighted Average | Excess spread financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Option adjusted spread(2) 8.80%  
Discount rate   11.30%
Prepayment speed 8.40% 9.20%
Average life(4) 6 years 8 months 12 days 6 years 7 months 6 days
Weighted Average | Mortgage servicing rights financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Advance financing and counterparty fee rates 7.60% 7.10%
Annual advance recovery rates 13.00% 17.30%