Inventories

3 Months Ended

Mar. 31, 2016

Energy Related Inventory [Abstract]

Inventories

2. Inventories

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

millions	March 31, 2016		December 31, 2015
Oil	$	96	$	116
Natural gas	25		36
NGLs	67		64
Total inventories	$	188	$	216