Inventory

9 Months Ended

Sep. 30, 2015

Inventory [Abstract]

Inventory

(3) INVENTORY

Inventory is comprised of tubulars and other equipment and natural gas in underground storage. Tubulars and other equipment are carried at the lower of cost or market and are accounted for by a moving weighted average cost method that is applied within specific classes of inventory items. Natural gas in underground storage is carried at the lower of cost or market and accounted for by a weighted average cost method.

The components of inventory recorded in current assets as of September 30, 2015 and December 31, 2014 consisted of the following:

	September 30,		December 31,
	2015		2014
	(in millions)
Tubulars and other equipment	$	31	$	33
Natural gas in underground storage	$	2	$	4