Property, Plant and Equipment (Tables)

6 Months Ended

Jun. 30, 2018

Oil and Gas Exploration and Production Industries Disclosures [Abstract]

Schedule of capitalized costs of proved and unproved oil and natural gas properties by area

Our capitalized costs related to proved and unproved oil and natural gas properties by area were as follows:



	June 30, 2018			December 31, 2017
	(in millions)
Proved
Eagle Ford	$	3,734		$	3,219
Permian	2,799			2,705
Altamont	1,599			1,542
Total Proved	8,132			7,466
Unproved
Permian	59			66
Less accumulated depletion	(3,384		)	(3,137		)
Net capitalized costs for oil and natural gas properties	$	4,807		$	4,395

Schedule of changes in net asset retirement liability

The net asset retirement liability as of June 30, 2018 on our consolidated balance sheet in other current and non-current liabilities and the changes in the net liability from January 1 through June 30, 2018 were as follows:



	2018
	(in millions)
Net asset retirement liability at January 1	$	35
Accretion expense	1
Changes in estimate	1
Net asset retirement liability at June 30	$	37

EP Energy LLC 10-Q