Inventories

6 Months Ended

Jun. 30, 2022

Inventory Disclosure [Abstract]

Inventories

Inventories

	June 30, 2022		December 31, 2021
Finished goods	$	486	$	478
Work-in-process	725		631
Purchased raw materials	307		256
Operating supplies	45		37
Total inventories	$	1,563	$	1,402

At June 30, 2022 and December 31, 2021, the portion of inventories valued on a last-in, first-out (“LIFO”) basis was $627 and $523, respectively. These amounts exclude the effects of LIFO valuation reductions, which were $203 and $192 at June 30, 2022 and December 31, 2021, respectively.