Inventories

3 Months Ended

Mar. 31, 2025

Inventory Disclosure [Abstract]

Inventories

Inventories

	March 31, 2025		December 31, 2024
Finished goods	$	467	$	458
Work-in-process	948		903
Purchased raw materials	417		408
Operating supplies	70		71
Total inventories	$	1,902	$	1,840

As of March 31, 2025 and December 31, 2024, the portion of inventories valued on a last-in, first-out (“LIFO”) basis was $566 and $544, respectively. If valued on an average-cost basis, total inventories would have been $282 and $280 higher as of March 31, 2025 and December 31, 2024, respectively.