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Acquisition and Divestitures (Narrative) (Details) shares in Millions, $ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jul. 31, 2024 USD ($) shares | Mar. 31, 2023 USD ($) | Jun. 30, 2024 USD ($) $ / MMBTU $ / bbl shares | Dec. 31, 2023 shares
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations And Disposition [Line Items] |  |  |  |
Potential additional contingent earnout payment |  |  | $ 65 |
Common stock, shares issued (in shares) | shares |  |  | 628 | 636
Other Current Assets [Member] |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations And Disposition [Line Items] |  |  |  |
Contingent earnout payments |  |  | $ 20 |
Barnett Shale [Member] |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations And Disposition [Line Items] |  |  |  |
Contingent earnout payments |  | $ 65 | $ 20 |
Henry Hub gas price for contingent earnout payment upside | $ / MMBTU |  |  | 2.75 |
WTI oil price for contingent earnout payment upside | $ / bbl |  |  | 50 |
Contingent earnout payment period |  |  | The contingent payment period commenced on January 1, 2021 and has a term of four years. |
Williston Acquisition [Member] |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations And Disposition [Line Items] |  |  |  |
Cash paid related to acquisition | $ 3,250 |  |  |
Williston Acquisition [Member] | Common Stock [Member] |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations And Disposition [Line Items] |  |  |  |
Common stock, shares issued (in shares) | shares | 37 |  |  |
Non Core Assets [Member] |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations And Disposition [Line Items] |  |  |  |
Contingent earnout payments |  | $ 4 |  |

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