Asset Retirement Obligations (Tables)

3 Months Ended

Mar. 31, 2020

Asset Retirement Obligation Disclosure [Abstract]

Schedule of Changes in Asset Retirement Obligations

Asset retirement obligations primarily consist of estimated costs to remove, dismantle and restore land or seabed at the end of oil and gas production operations. Changes in asset retirement obligations for the three months ended were as follows:

	March 31,
(In millions)	2020			2019
Beginning balance	$	254		$	1,145
Incurred liabilities, including acquisitions	1			12
Settled liabilities, including dispositions	(2		)	(109		)
Accretion expense (included in depreciation, depletion and amortization)	3			13
Revisions of estimates	(9		)	11
Held for sale	—			(862		)
Ending balance	$	247		$	210