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Goodwill - Summary of Change in Carrying Value of Goodwill (Detail)
$ in Millions
9 Months Ended
Sep. 30, 2024
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Beginning balance $ 8,969.5
Acquisitions completed in the current year 323.5
Adjustments to prior acquisitions 0.2
Effect of foreign currency translation 81.2
Ending balance $ 9,374.4