v3.26.1
Fair Value - Schedule of Fair Value Assets and Liabilities (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans held for sale, at fair value $ 3,150.2 $ 1,891.7 $ 1,402.2 $ 1,290.2
Reverse loans held for sale pooled into HMBS, at fair value 9,596.5 9,807.5    
Financial liabilities        
HMBS-related borrowings 9,437.4 9,611.7 $ 10,587.6 10,872.1
Other financing liabilities, at fair value 794.6 842.0    
MSR financing facilities 1,371.0 1,285.2    
Advance match funded liabilities 291.3 341.9    
Mortgage warehouse facilities 2,193.0 1,224.6    
Reverse mortgage securitization notes, net (related to VIE) 1,321.0 899.3    
Senior notes 692.8 489.6    
MSRs 3,025.9 2,825.3   $ 2,466.3
Carrying Value        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans held for sale, at fair value 3,150.2 1,891.7    
Financial liabilities        
Other financing liabilities, at fair value 794.6 842.0    
Fair Value        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Loans held for sale, at fair value 3,150.2 1,891.7    
Financial liabilities        
Other financing liabilities, at fair value 794.6 842.0    
Financing Liability Excess Servicing Spread [Member]        
Financial liabilities        
Other financing liabilities, at fair value 253.4 268.8    
Level 3 | Carrying Value        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Advances, net 431.1 483.4    
Reverse loans held for sale pooled into HMBS, at fair value 9,596.5 9,807.5    
Receivables, net 365.0 189.8    
Financial liabilities        
HMBS-related borrowings 9,437.4 9,611.7    
MSR financing facilities 1,371.0 1,285.2    
Advance match funded liabilities 291.3 341.9    
Mortgage warehouse facilities 2,193.0 1,224.6    
Reverse mortgage securitization notes, net (related to VIE) 1,321.0 899.3    
MSRs 3,025.9 2,825.3    
Level 3 | Fair Value        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Advances, net 431.1 483.4    
Reverse loans held for sale pooled into HMBS, at fair value 9,596.5 9,807.5    
Receivables, net 365.0 189.8    
Financial liabilities        
HMBS-related borrowings 9,437.4 9,611.7    
MSR financing facilities 1,365.0 1,278.3    
Advance match funded liabilities 291.3 341.9    
Mortgage warehouse facilities 2,193.0 1,224.6    
Reverse mortgage securitization notes, net (related to VIE) 1,327.4 909.6    
MSRs 3,025.9 2,825.3    
Level 3 | Interest Rate Contract | Carrying Value        
Financial liabilities        
Interest rate lock commitments 5.0 17.3    
Level 3 | Interest Rate Contract | Fair Value        
Financial liabilities        
Interest rate lock commitments 5.0 17.3    
Level 2 | Carrying Value        
Financial liabilities        
Senior notes 692.8 489.6    
Level 2 | Fair Value        
Financial liabilities        
Senior notes 673.8 515.0    
Level 1 | Other | Carrying Value        
Financial liabilities        
Interest rate lock commitments 7.6 1.7    
Level 1 | Other | Fair Value        
Financial liabilities        
Interest rate lock commitments $ 7.6 $ 1.7