v3.26.3
Fair Value - Schedule of Fair Value Assets and Liabilities (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Jun. 30, 2026
Dec. 31, 2025
Sep. 30, 2025
Jun. 30, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans held for sale, at fair value $ 2,747.3 $ 3,601.9 $ 1,891.7 $ 1,915.6 $ 2,048.3 $ 1,290.2
Reverse loans held for sale pooled into HMBS, at fair value 0.0 0.0 9,807.5      
Reverse loans held for investment pooled into HMBS, at fair value 3,362.6 3,640.6 0.0 10,117.4 10,470.8 11,125.3
Financial liabilities            
HMBS-related borrowings 3,335.1 3,610.9 9,611.7 $ 9,924.6 10,253.1 10,872.1
Other financing liabilities, at fair value 613.1   842.0      
MSR financing facilities 1,699.9   1,285.2      
Advance match funded liabilities 259.4   341.9      
Mortgage warehouse facilities 1,430.1   1,224.6      
Reverse mortgage securitization notes, net (related to VIE) 1,699.4   899.3      
Senior notes 693.6   489.6      
MSRs 3,360.6 $ 3,208.8 2,825.3   $ 2,632.6 $ 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 2,747.3   1,891.7      
Total 6,755.0   12,372.4      
Financial liabilities            
Other financing liabilities, at fair value 613.1   842.0      
Total 9,730.6   14,694.3      
Fair Value            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans held for sale, at fair value 2,747.3   1,891.7      
Total 6,755.0   12,372.4      
Financial liabilities            
Other financing liabilities, at fair value 613.1   842.0      
Total 9,639.6   14,723.1      
Financing Liability Excess Servicing Spread [Member]            
Financial liabilities            
Other financing liabilities, at fair value 266.3   268.8      
Level 3 | Carrying Value            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Advances, net 375.1   483.4      
Reverse loans held for sale pooled into HMBS, at fair value 0.0   9,807.5      
Reverse loans held for investment pooled into HMBS, at fair value 3,362.6   0.0      
Receivables, net 270.0   189.8      
Financial liabilities            
HMBS-related borrowings 3,335.1   9,611.7      
MSR financing facilities 1,699.9   1,285.2      
Advance match funded liabilities 259.4   341.9      
Mortgage warehouse facilities 1,430.1   1,224.6      
Reverse mortgage securitization notes, net (related to VIE) 1,699.4   899.3      
MSRs 3,360.6   2,825.3      
Level 3 | Fair Value            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Advances, net 375.1   483.4      
Reverse loans held for sale pooled into HMBS, at fair value 0.0   9,807.5      
Reverse loans held for investment pooled into HMBS, at fair value 3,362.6   0.0      
Receivables, net 270.0   189.8      
Financial liabilities            
HMBS-related borrowings 3,335.1   9,611.7      
MSR financing facilities 1,695.4   1,278.3      
Advance match funded liabilities 259.4   341.9      
Mortgage warehouse facilities 1,430.1   1,224.6      
Reverse mortgage securitization notes, net (related to VIE) 1,658.9   909.6      
MSRs 3,360.6   2,825.3      
Level 3 | Interest Rate Contract | Carrying Value            
Financial liabilities            
Interest rate lock commitments (9.5)   17.3      
Level 3 | Interest Rate Contract | Fair Value            
Financial liabilities            
Interest rate lock commitments (9.5)   17.3      
Level 2 | Carrying Value            
Financial liabilities            
Senior notes 693.6   489.6      
Level 2 | Fair Value            
Financial liabilities            
Senior notes 647.6   515.0      
Level 1 | Other | Carrying Value            
Financial liabilities            
Interest rate lock commitments 28.9   1.7      
Level 1 | Other | Fair Value            
Financial liabilities            
Interest rate lock commitments $ 28.9   $ 1.7