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Other Intangible Assets - Schedule of Amortization Expense (Detail) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Finite-Lived Intangible Assets [Line Items]      
Gross carrying amount $ 373.3 $ 331.9 $ 315.1
Accumulated amortization (305.6) (266.5) $ (257.8)
Product Rights [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross carrying amount 34.0 34.0  
Accumulated amortization (34.0) (34.0)  
Brand Names [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross carrying amount 8.9 8.9  
Accumulated amortization (8.9) (8.9)  
Technology [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross carrying amount 55.1 55.1  
Accumulated amortization (55.1) (44.6)  
Customer Relationships [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross carrying amount 137.3 130.6  
Accumulated amortization (129.2) (111.9)  
Internally Developed Software [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross carrying amount 113.4 78.7  
Accumulated amortization (53.8) (42.5)  
Other [Member]      
Finite-Lived Intangible Assets [Line Items]      
Gross carrying amount 24.6 24.6  
Accumulated amortization $ (24.6) $ (24.6)