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Inventories (Details) - USD ($)
$ in Millions
Sep. 30, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Finished goods $ 815.0 $ 589.3
Repair and replacement parts 599.0 532.5
Work in process 215.3 113.8
Raw materials 435.9 279.2
Inventories, net $ 2,065.2 $ 1,514.8