Inventories

3 Months Ended

Mar. 31, 2026

Inventory Disclosure [Abstract]

Inventories

Inventories

	March 31, 2026		December 31, 2025
Finished goods	$	475	$	462
Work-in-process	924		885
Purchased raw materials	492		424
Operating supplies	84		78
Total inventories	$	1,975	$	1,849

As of March 31, 2026 and December 31, 2025, the portion of inventories valued on a last-in, first-out (“LIFO”) basis was $668 and $642, respectively. If valued on an average-cost basis, total inventories would have been $348 and $333 higher as of March 31, 2026 and December 31, 2025, respectively.