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Inventories (Details) - USD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Finished goods $ 925.2 $ 660.4
Repair and replacement parts 640.9 587.3
Work in process 311.4 217.5
Raw materials 547.3 443.5
Inventories, net $ 2,424.8 $ 1,908.7