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Inventories - Summary of Inventories (Detail) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Inventory Disclosure [Abstract]    
Raw materials $ 336.7 $ 321.3
Work-in-process 78.4 76.7
Finished goods 100.1 103.4
Inventories $ 515.2 $ 501.4