Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2019

Asset Retirement Obligation [Abstract]

Schedule of Asset Retirement Obligations

The following table summarizes the Company’s 2019 and 2018 activity related to asset retirement obligations:

(in millions)	2019		2018
Asset retirement obligation at January 1	$	61	$	165
Accretion of discount	3		9
Obligations incurred	2		1
Obligations settled/removed (1)	(9)		(116)
Revisions of estimates	—		2
Asset retirement obligation at December 31	$	57	$	61
Current liability	$	6	$	6
Long-term liability	51		55
Asset retirement obligation at December 31	$	57	$	61

(1)Obligations settled/removed include $111 million related to asset divestitures in 2018, of which $107 million related to the Fayetteville Shale sale.