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Fair Value Measurements - Unobservable Inputs (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Min | MSR(1)    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Discount rate 10.40% 9.50%
Prepayment speed 6.30% 11.70%
Cost to service per loan(2) $ 54 $ 59
Min | Mortgage loans held for sale    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Market pricing $ 0.373  
Min | IRLCs    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Value of servicing (reflected as a percentage of loan commitment) (0.006) (0.007)
Min | Excess spread financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Discount rate 10.00% 9.50%
Prepayment speed 6.90% 12.80%
Min | Mortgage servicing rights financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Advance financing and counterparty fee rates 5.20% 4.50%
Annual advance recovery rates 15.90% 19.20%
Max | MSR(1)    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Discount rate 13.70% 13.70%
Prepayment speed 12.20% 16.40%
Cost to service per loan(2) $ 155 $ 168
Max | Mortgage loans held for sale    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Market pricing $ 1.147  
Max | IRLCs    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Value of servicing (reflected as a percentage of loan commitment) 0.039 0.024
Max | Excess spread financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Discount rate 13.80% 13.80%
Prepayment speed 13.30% 15.20%
Max | Mortgage servicing rights financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Advance financing and counterparty fee rates 8.60% 7.90%
Annual advance recovery rates 20.60% 22.00%
Weighted Average | MSR(1)    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Discount rate 11.40% 10.90%
Prepayment speed 7.20% 13.00%
Cost to service per loan(2) $ 80 $ 77
Average life(3) 8 years 1 month 6 days 5 years 9 months 18 days
Weighted Average | Mortgage loans held for sale    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Market pricing $ 0.774  
Weighted Average | IRLCs    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Value of servicing (reflected as a percentage of loan commitment) 0.023 0.014
Weighted Average | Excess spread financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Discount rate 11.30% 11.20%
Prepayment speed 9.20% 13.40%
Average life(3) 6 years 7 months 6 days 5 years 4 months 24 days
Weighted Average | Mortgage servicing rights financing    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Advance financing and counterparty fee rates 7.10% 6.50%
Annual advance recovery rates 17.30% 21.30%