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Inventories (Tables)
6 Months Ended
Jun. 30, 2018
Inventory Disclosure [Abstract]  
Schedule of Inventory
Inventories at June 30, 2018 and December 31, 2017 were as follows (in millions):
 
June 30, 2018
 
December 31, 2017
Finished goods
$
781.2

 
$
684.1

Repair and replacement parts
611.4

 
605.9

Work in process
264.1

 
178.7

Raw materials
475.2

 
404.2

Inventories, net
$
2,131.9

 
$
1,872.9