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Acquisition and Divestitures (Narrative) (Details) shares in Millions, $ in Millions |  |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 30, 2024 USD ($) shares | Sep. 27, 2024 USD ($) shares | Sep. 30, 2024 USD ($) shares | Sep. 30, 2023 USD ($) | Mar. 31, 2023 USD ($) | Sep. 30, 2024 USD ($) $ / bbl $ / MMBTU shares | Sep. 30, 2023 USD ($) | 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 | 658.0 |  | 658.0 |  |  | 658.0 |  | 636.0
Total revenues |  |  | $ 4,024 | $ 3,836 |  | $ 11,537 | $ 11,113 |
Net earnings |  |  | $ 825 | $ 920 |  | 2,289 | $ 2,621 |
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. |  |
GME Revenues and Earnings |  |  |  |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations And Disposition [Line Items] |  |  |  |  |  |  |  |
Total revenues | $ 28 |  |  |  |  |  |  |
Net earnings | $ 4 |  |  |  |  |  |  |
Williston Acquisition [Member] |  |  |  |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations And Disposition [Line Items] |  |  |  |  |  |  |  |
Total consideration for business acquired |  | $ 5,000 |  |  |  |  |  |
Cash paid related to acquisition |  | $ 3,500 |  |  |  |  |  |
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 |  | 37.3 |  |  |  |  |  |
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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