Commodity Inventories

9 Months Ended

Sep. 30, 2018

Energy Related Inventory [Abstract]

Inventories

3. Commodity Inventories

The following summarizes the major classes of commodity inventories included in other current assets:

	September 30,		December 31,
millions	2018		2017
Oil	$	168	$	165
Natural gas	19		29
NGLs	131		122
Total commodity inventories	$	318	$	316