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Natural Gas and Oil Property Transactions - Narrative (Details) - USD ($) $ in Millions |  |  |  | 3 Months Ended | 7 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 28, 2023 | Mar. 20, 2023 | Mar. 25, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Aug. 31, 2023 | Feb. 28, 2023 | Jan. 31, 2023 | Dec. 31, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss on natural gas and oil derivatives |  |  |  | $ (106) | $ 1,029 |  | $ (1,195) | $ 3,668 |  |  |  |
Costs and expenses |  |  |  | 1,433 | 2,157 |  | 4,357 | 6,065 |  |  |  |
Funds held for transition services |  |  |  |  |  |  | 91 | 0 |  |  |  |
Disposed of by Sale | Portion of Remaining Eagle Ford Assets |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration |  |  |  |  |  |  |  |  |  | $ 1,400 |  |
Purchase price | $ 225 |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale of oil and natural gas properties | 470 |  |  |  |  |  |  |  |  |  |  |
Asset retirement obligations | 53 |  |  |  |  |  |  |  |  |  |  |
Funds held for transition services |  |  |  |  |  |  | 91 |  |  |  |  |
Disposed of by Sale | Portion of Remaining Eagle Ford Assets | Other Current Assets |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Deferred consideration reflected with assets |  |  |  | 54 |  |  | 54 |  |  |  |  |
Disposed of by Sale | Portion of Remaining Eagle Ford Assets | Other Noncurrent Assets |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Deferred consideration reflected with assets |  |  |  | 141 |  |  | 141 |  |  |  |  |
Disposed of by Sale | Portion of Eagle Ford Assets |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration |  |  |  |  |  |  |  |  |  |  | $ 1,425 |
Purchase price |  | $ 225 |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale of oil and natural gas properties |  | 337 |  |  |  |  |  |  |  |  |  |
Property, plant and equipment |  |  |  |  |  |  |  |  |  |  |  | $ 811
Other assets held-for-sale |  |  |  |  |  |  |  |  |  |  |  | 8
Derivative liabilities |  |  |  |  |  |  |  |  |  |  |  | 65
Asset retirement obligations |  |  |  |  |  |  |  |  |  |  |  | 57
Other liabilities |  |  |  |  |  |  |  |  |  |  |  | $ 22
Disposed of by Sale | Portion of Eagle Ford Assets | Other Current Assets |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Deferred consideration reflected with assets |  |  |  | 57 |  |  | 57 |  |  |  |  |
Disposed of by Sale | Portion of Eagle Ford Assets | Other Noncurrent Assets |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Deferred consideration reflected with assets |  |  |  | 132 |  |  | 132 |  |  |  |  |
Disposed of by Sale | Portion Eagle Ford Assets to SilverBow Resources, Inc |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment |  |  |  | 510 |  |  | 510 |  |  |  |  |
Other assets held-for-sale |  |  |  | 10 |  |  | 10 |  |  |  |  |
Asset retirement obligations |  |  |  | 11 |  |  | 11 |  |  |  |  |
Disposed of by Sale | Portion Eagle Ford Assets to SilverBow Resources, Inc | Scenario, Plan |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration |  |  |  |  |  |  |  |  | $ 700 |  |  |
Disposed of by Sale | Portion Eagle Ford Assets to SilverBow Resources, Inc | If Transaction Closes by 2023 and Satisfaction of Certain Commodity Price Are Met |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Consideration |  |  |  |  |  |  |  |  | $ 50 |  |  |
Disposed of by Sale | Powder River Basin |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale of oil and natural gas properties |  |  | $ 293 |  |  |  |  |  |  |  |  |
Proceeds from divestitures of property and equipment |  |  | 450 |  |  |  |  |  |  |  |  |
Disposed of by Sale | Powder River Basin | Post-Close Adjustments |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Gain (loss) on sale of oil and natural gas properties |  |  | $ 13 |  |  |  |  |  |  |  |  |
Disposed of by Sale | First Three Years | Portion of Eagle Ford Assets |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Deferred consideration paid in installments |  | 60 |  |  |  |  |  |  |  |  |  |
Disposed of by Sale | Fourth Year | Portion of Eagle Ford Assets |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Deferred consideration paid in installments |  | $ 45 |  |  |  |  |  |  |  |  |  |
Disposed of by Sale | Next Four Years | Portion of Remaining Eagle Ford Assets |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Deferred consideration paid in installments | $ 56 |  |  |  |  |  |  |  |  |  |  |
Natural gas, oil and NGL |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  | 682 | 2,987 |  | 2,784 | 7,691 |  |  |  |
Natural gas, oil and NGL | Powder River Basin |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  | 99 |  |  |  |
Marketing |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  | $ 724 | $ 1,206 | $ 20 | $ 1,987 | $ 3,296 |  |  |  |
Marcellus |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss on natural gas and oil derivatives |  |  |  |  |  | 542 |  |  |  |  |  |
Costs and expenses |  |  |  |  |  | 329 |  |  |  |  |  |
Marcellus | Natural gas, oil and NGL |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  | $ 959 |  |  |  |  |  |

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