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Inventories
12 Months Ended
Dec. 31, 2019
Inventory, Net [Abstract]  
Inventories Inventories
Inventories, at December 31, consist of the following:
 
 
2019
 
2018
Raw materials
$
101.3

 
$
100.8

Work-in-process
44.1

 
49.5

Finished goods
34.3

 
47.3

Operating and other supplies
140.9

 
146.2

Inventories
$
320.6

 
$
343.8