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Inventories (Tables)
 6 Months Ended
Jun. 30, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
Inventories consist of the following: 
 
 
June 30, 2017
 
December 31, 2016
 
 
(in millions)
 
 
 
 
 
Raw materials and work-in-progress
 
$
322.9

 
$
163.3

Finished goods
 
86.4

 
33.8

Gross inventories
 
409.3

 
197.1

Inventory valuation reserves
 
(24.8
)
 
(14.8
)
Inventories, net
 
$
384.5

 
$
182.3