v3.26.1
Mortgage Servicing - Schedule of Activity Related to MSRs - Fair Value Measurement Method (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 01, 2026
Jan. 05, 2026
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Servicing Asset at Fair Value, Amount [Roll Forward]                  
Beginning balance       $ 3,025.9 $ 2,825.3 $ 2,547.4 $ 2,825.3 $ 2,466.3  
Sales (1)       0.2     (20.5)    
Sales (1)           0.1   0.3  
Recognized on the sale of residential mortgage loans       155.7   82.4 260.6 142.9  
Purchases of MSRs       143.8   49.1 337.2 147.4  
Servicing transfers and adjustments       (106.0)   (12.0) (123.2) (12.0)  
Changes in fair value recognized in earnings:                  
Changes in valuation inputs or assumptions       61.0   26.8 73.3 7.2  
Realization of cash flows (4)       (71.8)   (61.2) (143.9) (119.4)  
Ending balance $ 3,208.8     3,208.8 3,025.9   3,208.8    
Assets serviced 205,300.0     205,300.0     205,300.0   $ 191,100.0
Servicing Asset at Fair Value, Period Increase (Decrease)       (10.8)     (70.6)    
Servicing assets at fair value, net additions (sales) recognized       193.7     454.1    
Financing Liability Mortgage Servicing Rights Pledged [Member]                  
Servicing Asset at Fair Value, Amount [Roll Forward]                  
Sales (1)       (5.9)   (7.5) 15.4 14.2  
Changes in fair value recognized in earnings:                  
Unpaid Principal Balance, Mortgage Servicing Rights Sold, Subservicing Retained     $ 1,300.0            
Other MSR Capital Partners                  
Changes in fair value recognized in earnings:                  
UPB of MSR liability 5,900.0                
Servicing Asset At Fair Value, Amount, Derecognition (105.9)                
Fair Value Agency Mortgage Servicing Rights                  
Changes in fair value recognized in earnings:                  
Ending balance           2,632.6   2,632.6  
Servicing Asset at Fair Value, Period Increase (Decrease)           (34.4)   (112.2)  
Servicing assets at fair value, net additions (sales) recognized           $ 119.7   $ 278.6  
Transferred MSR, Subject To Pledged Liability                  
Servicing Asset at Fair Value, Amount [Roll Forward]                  
Beginning balance         581.0   581.0    
Changes in fair value recognized in earnings:                  
Ending balance 462.6     462.6     462.6    
Assets serviced 31,000.0     31,000.0     31,000.0   38,600.0
Transferred MSR, Subject To Pledged Liability | Rithm Capital Corp                  
Changes in fair value recognized in earnings:                  
Assets serviced 6,800.0     6,800.0     6,800.0    
Fair Value GSE Mortgage Servicing Rights                  
Servicing Asset at Fair Value, Amount [Roll Forward]                  
Beginning balance         2,089.2   2,089.2    
Changes in fair value recognized in earnings:                  
Ending balance 2,326.0     2,326.0     2,326.0    
Assets serviced 154,100.0     154,100.0     154,100.0   143,500.0
Fair Value GNMA Mortgage Servicing Rights                  
Servicing Asset at Fair Value, Amount [Roll Forward]                  
Beginning balance         528.6   528.6    
Changes in fair value recognized in earnings:                  
Ending balance 697.3     697.3     697.3    
Assets serviced 34,300.0     34,300.0     34,300.0   28,100.0
Fair Value Non-Agency Mortgage Servicing Rights                  
Servicing Asset at Fair Value, Amount [Roll Forward]                  
Beginning balance         207.4   207.4    
Changes in fair value recognized in earnings:                  
Ending balance 185.5     185.5     185.5    
Assets serviced 16,900.0     16,900.0     16,900.0   $ 19,500.0
Fair Value Non-Agency Mortgage Servicing Rights | Rithm Capital Corp                  
Changes in fair value recognized in earnings:                  
UPB of MSR liability   $ 1,200.0     1,200.0        
Financing Liability Excess Servicing Spread [Member]                  
Servicing Asset at Fair Value, Amount [Roll Forward]                  
Beginning balance         $ 373.5   373.5    
Changes in fair value recognized in earnings:                  
Ending balance 368.7     368.7     368.7    
Transferred MSR, Expected To Transfer Upon Receipt Of Required Consent | Rithm Capital Corp                  
Changes in fair value recognized in earnings:                  
Assets serviced $ 3,400.0     $ 3,400.0     $ 3,400.0