Inventories

3 Months Ended

Mar. 31, 2017

Energy Related Inventory [Abstract]

Inventories

2. Inventories

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

millions	March 31,   2017		December 31,   2016
Oil	$	130	$	169
Natural gas	19		38
NGLs	94		106
Total inventories	$	243	$	313