Inventories

3 Months Ended

Mar. 31, 2020

Inventories

Inventories

4. Inventories

Major classes of inventory at March 31, 2020, December 31, 2019 and March 31, 2019 are as follows:

	March 31,		December 31,		March 31,
	2020		2019		2019
Finished goods	$	884	$	872	$	868
Raw materials		121		128		126
Operating supplies		42		45		44
	$	1,047	$	1,045	$	1,038