Inventories

12 Months Ended

Dec. 31, 2019

Inventory Disclosure [Abstract]

Inventories

4.  Inventories

Inventories at December 31 were as follows:

	2019		2018
	(In millions)
Crude oil and natural gas liquids	$	92	$	74
Materials and supplies		169		171
Total Inventories	$	261	$	245