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Fair Value of Financial Assets and Liabilities - Balances of Contingent Consideration (Detail) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Dec. 31, 2020
Financial Instruments, Financial Assets, Balance Sheet Groupings [Abstract]        
Accrued expenses and other current liabilities $ 17.4 $ 12.9    
Other non-current liabilities 5.4 11.5    
Total contingent consideration $ 22.8 $ 24.4 $ 28.0 $ 39.8