v3.26.1
Indebtedness (Components of Indebtedness) (Details)
€ in Millions, $ in Millions
Jun. 30, 2026
USD ($)
Jun. 30, 2026
EUR (€)
Dec. 31, 2025
USD ($)
Debt Instrument [Line Items]      
Debt issuance costs $ (8.4)   $ (9.7)
Total long-term debt 2,639.5   2,384.7
Total long-term indebtedness $ 2,180.3   2,323.1
Senior Notes | 5.450% Senior notes due 2027      
Debt Instrument [Line Items]      
Interest rate percentage 5.45% 5.45%  
Long-term debt, gross $ 400.0   400.0
Senior term loans due 2026 $ (399.3)   0.0
Senior Notes | 5.800% Senior notes due 2034      
Debt Instrument [Line Items]      
Interest rate percentage 5.80% 5.80%  
Long-term debt, gross $ 700.0   700.0
Senior Notes | 0.800% Senior notes due 2028      
Debt Instrument [Line Items]      
Interest rate percentage 0.80% 0.80%  
Long-term debt, gross $ 683.9 € 600.0 703.8
Senior Notes | Senior term loans due between 2026 and 2028      
Debt Instrument [Line Items]      
Long-term debt, gross 95.2   97.9
Senior Notes | Senior term loans due 2026      
Debt Instrument [Line Items]      
Senior term loans due 2026 (59.9)   (61.6)
Revolving Credit Facility | Line of Credit | Credit Facility, expires 2027      
Debt Instrument [Line Items]      
Long-term debt, gross 290.0   0.0
Multi-Currency Finance Contract | EIB Senior term loan due 2029      
Debt Instrument [Line Items]      
Long-term debt, gross 285.0   293.3
Multi-Currency Finance Contract | EIB Senior term loan due 2030      
Debt Instrument [Line Items]      
Long-term debt, gross $ 193.8   $ 199.4