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Inventories (Tables)
6 Months Ended
Jun. 30, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block] Inventories consist of the following: 
 June 30, 2020December 31, 2019
 (in millions)
   
Raw materials and work-in-progress$305.5  $310.4  
Finished goods81.1  83.7  
Gross inventories386.6  394.1  
Inventory valuation reserves(28.1) (20.5) 
Inventories, net$358.5  $373.6