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Inventories (Tables)
3 Months Ended
Mar. 31, 2020
Inventory, Net [Abstract]  
Schedule of Inventories

Inventories consist of the following:
 
March 31, 2020
 
December 31, 2019
Raw materials
$
94.8

 
$
101.3

Work-in-process
46.8

 
44.1

Finished goods
38.1

 
34.3

Operating and other supplies
137.9

 
140.9

Total inventories
$
317.6

 
$
320.6