v3.26.1
Loans Held for Sale - Fair Value - Schedule of Loans Held for Sale Fair Value (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Movement In Loans Held For Sale At Fair Value [Roll Forward]    
Beginning balance $ 1,891.7 $ 1,290.2
Originations and purchases 7,544.0 4,273.3
Proceeds from sales (6,103.9) (4,082.6)
Principal collections (52.1) (32.0)
Reverse mortgage loans, at fair value (1) 0.8 3.1
Receivables (32.8) (20.5)
REO (Other assets) (23.8) (12.3)
Advances (incl. capitalization upon Ginnie Mae modifications) 2.4 4.8
Fair value gain (loss) on loans held for sale, at fair value (2) (87.7) (35.4)
Other (3) 11.6 13.6
Ending balance 3,150.2 1,402.2
Principal amount outstanding on loans held for sale 3,320.4 2,008.5
Premium (discount) balance on loans held for sale (136.2) (97.9)
Fair value adjustment to loans held for sale (34.0) (18.9)
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans Held-for-sale, Fair Value Disclosure 3,150.2 $ 1,402.2
GSE loans    
Movement In Loans Held For Sale At Fair Value [Roll Forward]    
Beginning balance 482.8  
Ending balance 1,107.7  
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans Held-for-sale, Fair Value Disclosure 1,107.7  
Government- Forward loans    
Movement In Loans Held For Sale At Fair Value [Roll Forward]    
Beginning balance 550.0  
Ending balance 870.4  
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans Held-for-sale, Fair Value Disclosure 870.4  
Repurchased Ginnie Mae Loans    
Movement In Loans Held For Sale At Fair Value [Roll Forward]    
Beginning balance 31.2  
Ending balance 46.2  
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans Held-for-sale, Fair Value Disclosure 46.2  
Reverse Loans    
Movement In Loans Held For Sale At Fair Value [Roll Forward]    
Beginning balance 722.2  
Ending balance 978.9  
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans Held-for-sale, Fair Value Disclosure 978.9  
Other residential mortgage loans (3)    
Movement In Loans Held For Sale At Fair Value [Roll Forward]    
Beginning balance 105.5  
Ending balance 147.0  
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans Held-for-sale, Fair Value Disclosure $ 147.0