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Debt - Summary of Debt Instruments (Detail) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Sep. 04, 2025
Feb. 19, 2025
Current portion of long-term debt        
Total current portion of long-term debt $ 1,175.9 $ 587.1    
Long-term debt        
Senior Notes due       $ 600.0
Debt discount and issuance costs (44.2) (46.1)    
Adjustment related to interest rate swaps (114.1) (112.4)    
Total long-term debt 6,295.1 6,932.0    
Uncommitted Credit Facility [Member]        
Current portion of long-term debt        
Outstanding borrowings 0.0      
2025 Five-Year Credit Agreement [Member]        
Current portion of long-term debt        
Outstanding borrowings 0.0      
5.050% [Member] | Due in 2030 [Member]        
Long-term debt        
Senior Notes due       550.0
5.500% [Member] | Due in 2035 [Member]        
Long-term debt        
Senior Notes due       $ 600.0
Senior Notes [Member] | 3.550% [Member] | Due in 2030 [Member]        
Long-term debt        
Senior Notes due 257.5 257.5    
Senior Notes [Member] | 4.700% [Member] | Due in 2027 [Member]        
Long-term debt        
Senior Notes due 600.0 600.0    
Senior Notes [Member] | 5.350% [Member] | Due in 2028 [Member]        
Long-term debt        
Senior Notes due 500.0 500.0    
Senior Notes [Member] | 5.050% [Member] | Due in 2030 [Member]        
Long-term debt        
Senior Notes due 550.0 550.0    
Senior Notes [Member] | 2.600% [Member] | Due in 2031 [Member]        
Long-term debt        
Senior Notes due 750.0 750.0    
Senior Notes [Member] | 5.200% [Member] | Due in 2034 [Member]        
Long-term debt        
Senior Notes due 700.0 700.0    
Senior Notes [Member] | 5.500% [Member] | Due in 2035 [Member]        
Long-term debt        
Senior Notes due 600.0 600.0    
Senior Notes [Member] | 4.250% [Member] | Due in 2035 [Member]        
Long-term debt        
Senior Notes due 253.4 253.4    
Senior Notes [Member] | 5.750% [Member] | Due in 2039 [Member]        
Long-term debt        
Senior Notes due 317.8 317.8    
Senior Notes [Member] | 4.450% [Member] | Due in 2045 [Member]        
Long-term debt        
Senior Notes due 395.4 395.4    
Euro Notes [Member] | 2.425% [Member] | Due in 2026 [Member]        
Long-term debt        
Senior Notes due 575.9 587.1    
Euro Notes [Member] | 1.164% [Member] | Due in 2027 [Member]        
Long-term debt        
Senior Notes due 575.9 587.1    
Euro Notes [Member] | 3.518% [Member] | Due in 2032 [Member]        
Long-term debt        
Senior Notes due 806.2 822.0    
Swiss Notes [Member] | 0.930% [Member] | Due in 2030 [Member]        
Long-term debt        
Senior Notes due 261.6 265.1 $ 210.0  
Swiss Notes [Member] | 1.560% [Member] | Due in 2035 [Member]        
Long-term debt        
Senior Notes due $ 485.7 $ 492.2 $ 390.0