Inventories

6 Months Ended

Jun. 30, 2023

Inventory Disclosure [Abstract]

Inventories

Inventories

	June 30, 2023		December 31, 2022
Finished goods	$	488	$	490
Work-in-process	800		748
Purchased raw materials	364		317
Operating supplies	63		54
Total inventories	$	1,715	$	1,609

As of June 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 $228 and $220 higher as of June 30, 2023 and December 31, 2022, respectively.