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Inventories (Tables)
12 Months Ended
Dec. 31, 2021
Inventory, Net [Abstract]  
Schedule of Inventories
Inventories, at December 31, consist of the following:
 
 20212020
Raw materials$132.9 $95.9 
Work-in-process76.1 40.5 
Finished goods43.9 26.9 
Operating and other supplies172.7 127.8 
Inventories$425.6 $291.1