Inventories

9 Months Ended

Sep. 30, 2022

Inventory, Net [Abstract]

Inventories

Inventories

Inventories consist of the following:

	September 30, 2022		December 31, 2021
Raw materials	$	62.7	$	132.9
Work-in-process	56.2		76.1
Finished goods	41.0		43.9
Operating and other supplies	223.3		172.7
Total inventories	$	383.2	$	425.6

Inventories are stated at the lower of cost or Net Realizable Value ("NRV") using the first-in, first-out or the weighted average cost method.