ASSET RETIREMENT OBLIGATION

6 Months Ended

Jun. 30, 2018

Asset Retirement Obligation Disclosure [Abstract]

ASSET RETIREMENT OBLIGATION

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, 2018:

	(In millions)
Asset retirement obligation at December 31, 2017	$	1,835
Liabilities incurred	18
Liabilities settled	(24		)
Accretion expense	54
Asset retirement obligation at June 30, 2018	1,883
Less current portion	(38		)
Asset retirement obligation, long-term	$	1,845