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Inventories (Tables)
9 Months Ended
Sep. 30, 2021
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block] Inventories consist of the following:
 September 30, 2021December 31, 2020
 (in millions)
   
Raw materials and work-in-progress$352.9 $276.2 
Finished goods87.5 70.4 
Gross inventories440.4 346.6 
Inventory valuation reserves(22.5)(23.4)
Inventories, net$417.9 $323.2