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Asset Retirement Obligations (Tables) | 12 Months Ended
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Dec. 31, 2022
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
|  | Year Ended December 31, 2022 |  | Period from February 10, 2021 through December 31, 2021 |  |  | Period from January 1, 2021 through February 9, 2021
Asset retirement obligations, beginning of period |  | $ | 360 |  |  | $ | 241 |  |  |  | $ | 144 |
Additions(a) |  | 53 |  |  | 48 |  |  |  | — |
Revisions(b) |  | 16 |  |  | 63 |  |  |  | — |
Settlements and disposals(c) |  | (54) |  |  | (3) |  |  |  | (1) |
Held for sale(d) |  | (57) |  |  | — |  |  |  | — |
Accretion expense |  | 17 |  |  | 11 |  |  |  | 1 |
Impact of fresh start accounting |  | — |  |  | — |  |  |  | 97 |
Asset retirement obligations, end of period |  | 335 |  |  | 360 |  |  |  | 241 |
Less current portion |  | 12 |  |  | 11 |  |  |  | 5 |
Asset retirement obligations, long-term |  | $ | 323 |  |  | $ | 349 |  |  |  | $ | 236 |
___________________________________________ (a) During the 2022 Successor Period, approximately $27 million of additions relate to the Marcellus Acquisition. During the 2021 Successor Period, approximately $44 million of additions relate to the Vine Acquisition. 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 2022 Successor Period, approximately $47 million of disposals related to our Powder River Basin assets. See Note 4 for further discussion of these transactions. (d) As of December 31, 2022, approximately $57 million of asset retirement obligations associated with the sale of a portion of our Eagle Ford assets have been reclassified as other current liabilities held for sale.

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- Definition Tabular disclosure of the carrying amount of a liability for asset retirement obligations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 + Details
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