Inventories

9 Months Ended

Sep. 30, 2023

Inventory Disclosure [Abstract]

Inventories

Inventories

	September 30, 2023		December 31, 2022
Finished goods	$	446	$	490
Work-in-process	857		748
Purchased raw materials	378		317
Operating supplies	67		54
Total inventories	$	1,748	$	1,609

As of September 30, 2023 and December 31, 2022, the portion of inventories valued on a last-in, first-out (“LIFO”) basis was $423 and $441, respectively. If valued on an average-cost basis, total inventories would have been $237 and $220 higher as of September 30, 2023 and December 31, 2022, respectively.