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Inventories
12 Months Ended
Dec. 31, 2022
Inventory, Net [Abstract]  
Inventories Inventories
Inventories, at December 31, consist of the following:
 
 20222021
Raw materials$64.9 $132.9 
Work-in-process46.0 76.1 
Finished goods58.0 43.9 
Operating and other supplies229.9 172.7 
Inventories$398.8 $425.6