v3.26.3
Business Segment Reporting - Schedule of Depreciation and Amortization by Segment (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Segment Reporting [Line Items]      
Amortization of debt issuance costs, discount and premium $ 39.6 $ 19.4  
Total Assets 11,320.9   $ 16,170.6
Servicing | Operating Segments      
Segment Reporting [Line Items]      
Total Assets 9,578.0   14,683.5
Originations | Operating Segments      
Segment Reporting [Line Items]      
Total Assets 1,410.8   1,252.3
Corporate Segment and Other Operating Segment [Member] | Operating Segments      
Segment Reporting [Line Items]      
Total Assets $ 332.1   $ 234.8