v3.25.4
Debt - Unamortized Discount and Debt Issuance Costs (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Mar. 31, 2025
Debt Instrument [Line Items]    
Total unamortized discount $ (11.7) $ (13.1)
Total debt issuance costs (16.2) (19.5)
Commercial Paper    
Debt Instrument [Line Items]    
Total unamortized discount (2.2) (0.1)
Senior indebtedness | 4.250% 2025 Notes    
Debt Instrument [Line Items]    
Total unamortized discount 0.0 (1.3)
Total debt issuance costs 0.0 (0.2)
Senior indebtedness | 4.900% 2028 Notes    
Debt Instrument [Line Items]    
Total unamortized discount (2.5) (3.3)
Total debt issuance costs (1.3) (1.7)
Senior indebtedness | 5.050% 2029 Notes    
Debt Instrument [Line Items]    
Total unamortized discount (3.5) (4.3)
Total debt issuance costs (1.3) (1.8)
Senior indebtedness | 5.050% 2030 Notes    
Debt Instrument [Line Items]    
Total unamortized discount (3.5) (4.1)
Total debt issuance costs (1.5) (1.7)
Senior subordinated convertible debt | 2017 Senior Convertible Debt    
Debt Instrument [Line Items]    
Total debt issuance costs (0.1) (0.1)
Senior subordinated convertible debt | 2024 Senior Convertible Debt    
Debt Instrument [Line Items]    
Total debt issuance costs $ (12.0) $ (14.0)