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Stockholders' Equity - Schedule of Accumulated Other Comprehensive Loss Balances, Net of Tax (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Accumulated Other Comprehensive Income Loss [Line Items]      
Beginning balance $ 6,534.9    
Net current period other comprehensive income (loss) 247.0 $ (114.9) $ 123.8
Ending balance 6,887.6 6,534.9  
Foreign Currency Translation [Member]      
Accumulated Other Comprehensive Income Loss [Line Items]      
Beginning balance (539.6) (424.5)  
Net current period other comprehensive income (loss) [1] 255.6 (115.1)  
Ending balance (284.0) (539.6) (424.5)
Defined Benefit Obligation [Member]      
Accumulated Other Comprehensive Income Loss [Line Items]      
Beginning balance (1.6) (1.8)  
Net current period other comprehensive income (loss) [1] (8.6) 0.2  
Ending balance (10.2) (1.6) (1.8)
Accumulated Other Comprehensive Loss [Member]      
Accumulated Other Comprehensive Income Loss [Line Items]      
Beginning balance (541.2) (426.3)  
Net current period other comprehensive income (loss) [1] 247.0 (114.9)  
Ending balance $ (294.2) $ (541.2) $ (426.3)
[1]

(1) Amounts are reported net of tax. Tax effects were immaterial.