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Inventories (Tables)
12 Months Ended
Dec. 31, 2023
Inventory, Net [Abstract]  
Schedule of Inventories
Inventories, at December 31, consist of the following:
 20232022
Raw materials$162.5 $64.9 
Work-in-process42.9 46.0 
Finished goods46.3 58.0 
Operating and other supplies225.3 229.9 
Inventories$477.0 $398.8