Inventories

3 Months Ended

Mar. 31, 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 March 31, 2019, and December 31, 2018, consisted of the following (in millions):

	2019			2018
Raw materials	$	71		$	74
Materials and supplies	470			445
Finished goods	990			788
	1,531			1,307
Revaluation to LIFO	(47		)	(47		)
Total	$	1,484		$	1,260