ASSET RETIREMENT OBLIGATION (Tables)

12 Months Ended

Dec. 31, 2020

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Changes to Asset Retirement Obligation

The following table describes changes to the Company’s asset retirement obligation (ARO) liability:

	For the Year Ended December 31,
	2020		2019
	(In millions)
Asset retirement obligation at beginning of year	$	1,858	$	1,932
Liabilities incurred	10		41
Liabilities divested	(26)		(56)
Liabilities settled	(30)		(56)
Accretion expense	109		107
Revisions in estimated liabilities	23		(110)
Asset retirement obligation at end of year	1,944		1,858
Less current portion	(56)		(47)
Asset retirement obligation, long-term	$	1,888	$	1,811