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Inventories - Components of Inventories (Detail) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Inventory Net [Abstract]    
Raw materials and manufacturing supplies $ 247.2 $ 261.7
Work in process 156.1 157.5
Finished goods 275.2 260.6
LIFO reserve (86.5) (93.6)
Total $ 592.0 $ 586.2