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Fair Value Measurements and Financial Risk - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Parenthetical) (Detail) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Money market mutual funds $ 32.5  
Market-based share awards liability 0.5 $ 0.5
Contingent consideration 1.5  
Other Noncurrent Liabilities [Member]    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]    
Market-based share awards liability 0.5  
Contingent consideration $ 36.3