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Inventories (Tables)
9 Months Ended
Sep. 30, 2020
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block] Inventories consist of the following: 
 September 30, 2020December 31, 2019
 (in millions)
   
Raw materials and work-in-progress$281.0 $310.4 
Finished goods62.2 83.7 
Gross inventories343.2 394.1 
Inventory valuation reserves(27.4)(20.5)
Inventories, net$315.8 $373.6