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Inventories (Tables)
 9 Months Ended
Sep. 30, 2017
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
Inventories consist of the following: 
 
 
September 30, 2017
 
December 31, 2016
 
 
(in millions)
 
 
 
 
 
Raw materials and work-in-progress
 
$
331.4

 
$
163.3

Finished goods
 
90.0

 
33.8

Gross inventories
 
421.4

 
197.1

Inventory valuation reserves
 
(24.8
)
 
(14.8
)
Inventories, net
 
$
396.6

 
$
182.3