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PROPERTY, PLANT AND EQUIPMENT (Tables) | 12 Months Ended
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Dec. 31, 2020
Property, Plant and Equipment [Abstract] |
Schedule of property, plant and equipment, net | Property, plant and equipment, net consisted of the following:
| Successor |  |  | Predecessor
(in millions) | December 31, 2020 |  |  | December 31, 2019
Proved oil and natural gas properties | $ | 2,416 |  |  |  | $ | 21,285 |
Unproved oil and natural gas properties(a) | 1 |  |  |  | 1,055 |
Facilities and other | 272 |  |  |  | 549 |
Total property, plant and equipment | 2,689 |  |  |  | 22,889 |
Accumulated depreciation, depletion and amortization | (34) |  |  |  | (16,537) |
Total property, plant and equipment, net | $ | 2,655 |  |  |  | $ | 6,352 |
(a)Includes a valuation allowance for unproved properties of zero and $823 million at December 31, 2020 and 2019, respectively.
Summary of the activity of capitalized exploratory well costs | The following table summarizes the activity of capitalized exploratory well costs:
| Successor |  |  | Predecessor
| November 1, 2020 - December 31, 2020 |  |  | January 1, 2020 - October 31, 2020 |  | Years ended December 31,
(in millions) |  |  |  | 2019 |  | 2018
Beginning balance | $ | 3 |  |  |  | $ | 7 |  |  | $ | 5 |  |  | $ | 4 |
Additions to capitalized exploratory well costs | — |  |  |  | — |  |  | 12 |  |  | 19 |
Reclassification to property, plant and equipment | — |  |  |  | — |  |  | (3) |  |  | (2) |
Charged to expense | — |  |  |  | (2) |  |  | (7) |  |  | (16) |
Impact of fresh start accounting | — |  |  |  | (2) |  |  | — |  |  | — |
Ending balance | $ | 3 |  |  |  | $ | 3 |  |  | $ | 7 |  |  | $ | 5 |

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- Definition Tabular disclosure of the change in capitalized exploratory costs during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68064819&loc=SL6806780-109447 + Details
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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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