v3.7.0.1
Inventories - Schedule of Inventories (Detail) - USD ($)
$ in Millions
Dec. 31, 2016
Dec. 31, 2015
Inventory Disclosure [Abstract]    
Raw materials $ 50.7 $ 57.3
Work in process 62.5 66.3
Finished goods 55.2 63.2
Total inventories $ 168.4 $ 186.8