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Stockholders' Equity - Schedule of Accumulated Other Comprehensive Loss Balances, Net of Tax (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning balance     $ 6,339.6  
Net current period other comprehensive loss $ 159.0 $ (113.0) 114.2 $ (4.8)
Ending balance 6,814.1   6,814.1  
Foreign Currency Translation [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning balance     (424.5)  
Net current period other comprehensive loss     114.1  
Ending balance (310.4)   (310.4)  
Defined Benefit Obligation [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning balance     (1.8)  
Net current period other comprehensive loss     0.1  
Ending balance (1.7)   (1.7)  
Accumulated Other Comprehensive (Loss) Income        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning balance     (426.3)  
Net current period other comprehensive loss     114.2  
Ending balance $ (312.1)   $ (312.1)