Inventories (Tables)

9 Months Ended

Sep. 30, 2016

Energy Related Inventory [Abstract]

Inventory Disclosure Table

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

millions	September 30, 2016		December 31, 2015
Oil	$	136	$	116
Natural gas	35		36
NGLs	83		64
Total inventories	$	254	$	216