Goodwill and Intangible Assets - Summary of Changes in Goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Beginning balance	$ 8,863.0	$ 8,045.5
Acquisitions completed in the current year	20.4	1,032.3
Adjustments to prior acquisitions	(0.8)	0.3
Effect of foreign currency translation	86.9	(215.1)
Ending balance	$ 8,969.5	$ 8,863.0