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Inventories (Tables)
9 Months Ended
Sep. 30, 2019
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
Inventories consist of the following: 
 
 
September 30, 2019
 
December 31, 2018
 
 
(in millions)
 
 
 
 
 
Raw materials and work-in-progress
 
$
337.3

 
$
375.1

Finished goods
 
88.0

 
99.0

Gross inventories
 
425.3

 
474.1

Inventory valuation reserves
 
(22.2
)
 
(14.4
)
Inventories, net
 
$
403.1

 
$
459.7