v3.26.1
Fair Value - Schedule of Fair Value Assets and Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 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 $ 3,601.9 $ 3,150.2 $ 1,891.7 $ 2,048.3 $ 1,402.2 $ 1,290.2
Reverse loans held for sale pooled into HMBS, at fair value 0.0 9,596.5 9,807.5      
Reverse loans held for investment pooled into HMBS, at fair value 3,640.6 0.0 0.0 10,470.8 10,812.5 11,125.3
Financial liabilities            
HMBS-related borrowings 3,610.9 9,437.4 9,611.7 $ 10,253.1 10,587.6 10,872.1
Other financing liabilities, at fair value 729.0   842.0      
MSR financing facilities 1,566.1   1,285.2      
Advance match funded liabilities 254.7   341.9      
Mortgage warehouse facilities 2,061.7   1,224.6      
Reverse mortgage securitization notes, net (related to VIE) 1,925.0   899.3      
Senior notes 693.2   489.6      
MSRs 3,208.8 $ 3,025.9 2,825.3   $ 2,547.4 $ 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 3,601.9   1,891.7      
Financial liabilities            
Other financing liabilities, at fair value 729.0   842.0      
Fair Value            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Loans held for sale, at fair value 3,601.9   1,891.7      
Financial liabilities            
Other financing liabilities, at fair value 729.0   842.0      
Financing Liability Excess Servicing Spread [Member]            
Financial liabilities            
Other financing liabilities, at fair value 271.5   268.8      
Level 3 | Carrying Value            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Advances, net 369.5   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 3,640.6   0.0      
Receivables, net 233.9   189.8      
Financial liabilities            
HMBS-related borrowings 3,610.9   9,611.7      
MSR financing facilities 1,566.1   1,285.2      
Advance match funded liabilities 254.7   341.9      
Mortgage warehouse facilities 2,061.7   1,224.6      
Reverse mortgage securitization notes, net (related to VIE) 1,925.0   899.3      
MSRs 3,208.8   2,825.3      
Level 3 | Fair Value            
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]            
Advances, net 369.5   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 3,640.6   0.0      
Receivables, net 233.9   189.8      
Financial liabilities            
HMBS-related borrowings 3,610.9   9,611.7      
MSR financing facilities 1,561.0   1,278.3      
Advance match funded liabilities 254.7   341.9      
Mortgage warehouse facilities 2,061.7   1,224.6      
Reverse mortgage securitization notes, net (related to VIE) 1,922.9   909.6      
MSRs 3,208.8   2,825.3      
Level 3 | Interest Rate Contract | Carrying Value            
Financial liabilities            
Interest rate lock commitments 17.3   17.3      
Level 3 | Interest Rate Contract | Fair Value            
Financial liabilities            
Interest rate lock commitments 17.3   17.3      
Level 2 | Carrying Value            
Financial liabilities            
Senior notes 693.2   489.6      
Level 2 | Fair Value            
Financial liabilities            
Senior notes 686.0   515.0      
Level 1 | Other | Carrying Value            
Financial liabilities            
Interest rate lock commitments 13.8   1.7      
Level 1 | Other | Fair Value            
Financial liabilities            
Interest rate lock commitments $ 13.8   $ 1.7