Inventory (Tables)

9 Months Ended

Sep. 30, 2016

Inventory Disclosure [Abstract]

Components of Inventory

The components of inventory are as follows:

	September 30, 2016		December 31, 2015
	(in millions)
Natural gas	$	214	$	217
NGLs	—		23
Materials and supplies	73		67
Total inventory	$	287	$	307