Inventories

6 Months Ended

Jun. 30, 2019

Inventory Disclosure [Abstract]

Inventories

Inventories

Finished goods primarily represents crude oil, which is carried at lower of weighted average cost or market value, and caustic soda and chlorine, which are valued under the last-in, first-out (LIFO) method. Inventories as of June 30, 2019, and December 31, 2018, consisted of the following (in millions):

	2019			2018
Raw materials	$	68		$	74
Materials and supplies	531			445
Finished goods	1,030			788
	1,629			1,307
Revaluation to LIFO	(47		)	(47		)
Total	$	1,582		$	1,260