Asset Retirement Obligations (Tables)

12 Months Ended

Dec. 31, 2021

Asset Retirement Obligation Disclosure [Abstract]

Schedule of asset retirement obligations

The components of the change in our asset retirement obligations are shown below:

	Successor		Predecessor
	Period from February 10, 2021 through December 31, 2021		Period from January 1, 2021 through February 9, 2021		Year Ended December 31, 2020
Asset retirement obligations, beginning of period	$	241	$	144	$	211
Additions(a)	48		—		1
Revisions (b)	63		—		(14)
Settlements and disposals(c)	(3)		(1)		(66)
Accretion expense	11		1		12
Impact of fresh start accounting	—		97		—
Asset retirement obligations, end of period	360		241		144
Less current portion	11		5		5
Asset retirement obligations, long-term	$	349	$	236	$	139

___________________________________________

(a)    During the 2021 Successor Period, approximately $44 million of additions relate to the acquisition of Vine. See Note 4 for further discussion of these transactions.

(b)    Revisions primarily represent changes in the present value of liabilities resulting from changes in estimated costs and economic lives of producing properties.

(c)    During the 2020 Predecessor Period, approximately $49 million and $14 million of disposals related to our Mid-Continent and Haynesville assets, respectively. See Note 4 for further discussion of these transactions.