Inventories

3 Months Ended

Mar. 31, 2019

Inventory Disclosure [Abstract]

Inventories

5.  Inventories

Inventories consisted of the following:

	March 31,		December 31,
	2019		2018
	(In millions)
Crude oil and natural gas liquids	$	96	$	74
Materials and supplies		178		171
Total Inventories	$	274	$	245