ASSET RETIREMENT OBLIGATION

3 Months Ended

Mar. 31, 2021

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:

	March 31, 2021
	(In millions)
Asset retirement obligation, December 31, 2020	$	1,944
Liabilities incurred	1
Liabilities settled	(3)
Accretion expense	28
Asset retirement obligation, March 31, 2021	1,970
Less current portion	(56)
Asset retirement obligation, long-term	$	1,914