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Stockholders' Equity - Schedule of Accumulated Other Comprehensive Loss Balances, Net of Tax (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning balance     $ 6,339.6  
Net current period other comprehensive loss $ 2.8 $ 66.1 (44.8) $ 108.2
Ending balance 6,427.9   6,427.9  
Foreign Currency Translation [Member]        
Accumulated Other Comprehensive Income Loss [Line Items]        
Beginning balance     (424.5)  
Net current period other comprehensive loss     (44.9)  
Ending balance (469.4)   (469.4)  
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     (44.8)  
Ending balance $ (471.1)   $ (471.1)