Fair Value of Financial Assets and Liabilities - Balances of Contingent Consideration (Detail) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Accrued expenses and other current liabilities	$ 2.3	$ 4.5
Other non-current liabilities	17.2	16.4
Total contingent consideration	$ 19.5	$ 20.9	$ 18.2	$ 14.0