v3.26.1
Loans Held for Sale - Fair Value - Schedule of Loans Held for Sale Fair Value (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Movement In Loans Held For Sale At Fair Value [Roll Forward]        
Beginning balance $ 3,150.2 $ 1,402.2 $ 1,891.7 $ 1,290.2
Originations and purchases 8,531.3 5,888.8 16,075.3 10,162.0
Proceeds from sales (7,821.5) (5,132.9) (13,925.3) (9,215.6)
Principal collections (94.8) (39.5) (147.0) (71.4)
Reverse mortgage loans, at fair value (1) 2.1 2.6 2.9 5.7
Receivables (38.9) (0.2) (71.7) (20.7)
REO (Other assets) (33.1) (13.0) (56.9) (25.4)
Advances (incl. capitalization upon Ginnie Mae modifications) 9.4 5.4 11.7 10.2
Fair value gain (loss) on loans held for sale, at fair value (2) (120.7) (73.5) (208.4) (108.9)
Other (3) 17.9 8.5 29.6 22.1
Ending balance 3,601.9 2,048.3 3,601.9 2,048.3
Principal amount outstanding on loans held for sale 3,833.0 2,008.5 3,833.0 2,008.5
Premium (discount) balance on loans held for sale (210.8) (97.9) (210.8) (97.9)
Fair value adjustment to loans held for sale (20.3) (18.9) (20.3) (18.9)
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans Held-for-sale, Fair Value Disclosure 3,601.9 $ 2,048.3 3,601.9 $ 2,048.3
GSE loans        
Movement In Loans Held For Sale At Fair Value [Roll Forward]        
Beginning balance     482.8  
Ending balance 703.2   703.2  
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans Held-for-sale, Fair Value Disclosure 703.2   703.2  
Government - Forward loans        
Movement In Loans Held For Sale At Fair Value [Roll Forward]        
Beginning balance     550.0  
Ending balance 1,208.0   1,208.0  
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans Held-for-sale, Fair Value Disclosure 1,208.0   1,208.0  
Repurchased Ginnie Mae Loans        
Movement In Loans Held For Sale At Fair Value [Roll Forward]        
Beginning balance     31.2  
Ending balance 67.5   67.5  
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans Held-for-sale, Fair Value Disclosure 67.5   67.5  
Reverse Loans        
Movement In Loans Held For Sale At Fair Value [Roll Forward]        
Beginning balance     722.2  
Ending balance 1,458.6   1,458.6  
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans Held-for-sale, Fair Value Disclosure 1,458.6   1,458.6  
Other residential mortgage loans (3)        
Movement In Loans Held For Sale At Fair Value [Roll Forward]        
Beginning balance     105.5  
Ending balance 164.6   164.6  
Accounts, Notes, Loans and Financing Receivable [Line Items]        
Loans Held-for-sale, Fair Value Disclosure $ 164.6   $ 164.6