Asset Retirement Obligation (Tables)

6 Months Ended

Jun. 30, 2015

Asset Retirement Obligation Disclosure [Abstract]

Asset Retirement Obligation

The following table describes changes to the Company’s asset retirement obligation (ARO) liability for the six-month period ended June 30, 2015:

	(In millions)
Asset retirement obligation at December 31, 2014	$	3,085
Liabilities incurred		47
Liabilities divested		(619	)
Liabilities settled		(67	)
Accretion expense		85
Revisions in estimated liabilities		31
Asset retirement obligation at June 30, 2015		2,562
Less current portion		(28	)
Asset retirement obligation, long-term	$	2,534