v3.25.4
Fair Value Measurements (Narrative) (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
0% Convertible Notes    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt, face amount $ 805.0  
2.25% Convertible Notes    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt, face amount 402.5 $ 402.5
Senior Notes [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt, long-term and short-term, combined carrying value 0.0 89.6
Long-term debt, current 0.0 6.1
Long-term debt, fair value 0.0 73.6
Long-term debt, face amount 1,207.5 486.0
Senior Notes [Member] | 2.25% Convertible Notes    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-term debt, face amount 402.5  
Convertible Debt | 0% Convertible Notes    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt, long-term and short-term, combined carrying value 783.7 0.0
Long-term debt, fair value 1,089.8 0.0
Convertible Debt | 2.25% Convertible Notes    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt, long-term and short-term, combined carrying value 391.2 389.0
Long-term debt, fair value $ 1,080.4 $ 403.8