Inventories

9 Months Ended

Sep. 30, 2017

Inventory Disclosure [Abstract]

Inventories

4.  Inventories

Inventories consisted of the following:

	September 30,		December 31,
	2017		2016
	(In millions)
Crude oil and natural gas liquids	$	110	$	77
Materials and supplies		262		246
Total Inventories	$	372	$	323