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ASSET RETIREMENT OBLIGATION (Tables)
 6 Months Ended
Jun. 30, 2019
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, 2019:
 
 
(In millions)
Asset retirement obligation at December 31, 2018
 
$
1,932

Liabilities incurred
 
7

Liabilities settled
 
(21
)
Liabilities divested
 
(6
)
Liabilities held for sale
 
(49
)
Accretion expense
 
53

Asset retirement obligation at June 30, 2019
 
1,916

Less current portion
 
(66
)
Asset retirement obligation, long-term
 
$
1,850