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Inventories - Summary of Inventories (Detail) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Inventory Disclosure [Abstract]    
Raw materials $ 313.9 $ 288.8
Work-in-process 76.4 79.3
Finished goods 99.9 94.0
Inventories $ 490.2 $ 462.1