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Inventories (Tables)
3 Months Ended
Mar. 31, 2021
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block] Inventories consist of the following: 
 March 31, 2021December 31, 2020
 (in millions)
   
Raw materials and work-in-progress$296.3 $276.2 
Finished goods65.6 70.4 
Gross inventories361.9 346.6 
Inventory valuation reserves(23.8)(23.4)
Inventories, net$338.1 $323.2