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Inventories, net (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Inventory Disclosure [Abstract]    
Raw material and supplies $ 489.9 $ 469.7
Work in progress 127.1 126.7
Finished goods 197.1 175.6
FIFO inventories 814.1 772.0
LIFO reserve (13.7) (13.1)
Inventories, net $ 800.4 $ 758.9