v3.26.1
Derivatives and Financial Instruments - Assets and Liabilities Measured at Fair Value (Detail) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Dec. 02, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Foreign currency contract liabilities $ (49.5)   $ (69.0)  
Contingent earn-out liabilities       $ (8.0)
Impairment of intangible assets 0.0 $ 30.9    
Recurring        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Interest rate contract liabilities     (0.2)  
Foreign currency contract assets 5.4      
Foreign currency contract liabilities (49.5)   (68.8)  
Deferred compensation plan 37.4   32.3  
Contingent earn-out liabilities (4.0)   (8.0)  
Total recurring fair value measurements (10.5)   (44.7)  
Recurring | Interest Rate Contract        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Interest rate contract assets 0.2      
Level 1 | Recurring        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Interest rate contract liabilities     0.0  
Foreign currency contract assets 0.0      
Foreign currency contract liabilities 0.0   0.0  
Deferred compensation plan 37.4   32.3  
Contingent earn-out liabilities 0.0   0.0  
Total recurring fair value measurements 37.4   32.3  
Level 1 | Recurring | Interest Rate Contract        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Interest rate contract assets 0.0      
Level 2 | Recurring        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Interest rate contract liabilities     (0.2)  
Foreign currency contract assets 5.4      
Foreign currency contract liabilities (49.5)   (68.8)  
Deferred compensation plan 0.0   0.0  
Contingent earn-out liabilities 0.0   0.0  
Total recurring fair value measurements (43.9)   (69.0)  
Level 2 | Recurring | Interest Rate Contract        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Interest rate contract assets 0.2      
Level 3 | Recurring        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Interest rate contract liabilities     0.0  
Foreign currency contract assets 0.0      
Foreign currency contract liabilities 0.0   0.0  
Deferred compensation plan 0.0   0.0  
Contingent earn-out liabilities (4.0)   (8.0)  
Total recurring fair value measurements (4.0)   $ (8.0)  
Level 3 | Recurring | Interest Rate Contract        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Interest rate contract assets $ 0.0