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Acquisitions and Divestitures (Narrative) (Details) shares in Millions, $ in Millions |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 27, 2024 USD ($) shares | Sep. 30, 2022 USD ($) MMBoe | Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($) | Mar. 31, 2022 USD ($) | Dec. 31, 2024 USD ($) $ / bbl $ / MMBTU shares | Dec. 31, 2023 USD ($) MMBoe shares | Dec. 31, 2022 USD ($) MMBoe
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations And Disposition [Line Items] |  |  |  |  |  |  |  |
Devon common stock issued | shares |  |  |  |  |  | 651.0 | 636.0 |
Common Stock Shares Issued |  |  |  |  |  | $ 65 | $ 64 |
Total estimated proved reserves | MMBoe |  |  |  |  |  |  | 1 | 3
Contingent earnout payments |  |  |  |  |  | 20 |  |
Total revenues |  |  |  |  |  | 15,940 | $ 15,258 | $ 19,169
Net earnings |  |  |  |  |  | 2,942 | $ 3,782 | $ 6,037
Barnett Shale [Member] |  |  |  |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations And Disposition [Line Items] |  |  |  |  |  |  |  |
Contingent earnout payments |  |  | $ 20 | $ 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 had a term of four years. |  |
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 | $ 4 |  |  |
Eagle Ford Acquisition [Member] |  |  |  |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations And Disposition [Line Items] |  |  |  |  |  |  |  |
Cash consideration |  | $ 1,700 |  |  |  |  |  |
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 |  |  |  |  |  |  |
Cash consideration |  | $ 830 |  |  |  |  |  |
Williston Acquisition [Member] | Common Stock [Member] |  |  |  |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations And Disposition [Line Items] |  |  |  |  |  |  |  |
Devon common stock issued | shares | 37.3 |  |  |  |  |  |  |
GME Revenues and Earnings [Member] |  |  |  |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations And Disposition [Line Items] |  |  |  |  |  |  |  |
Total revenues |  |  |  |  |  | $ 687 |  |
Net earnings |  |  |  |  |  | $ 122 |  |
Eagle Ford [Member] |  |  |  |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations And Disposition [Line Items] |  |  |  |  |  |  |  |
Total estimated proved reserves | MMBoe |  | 87 |  |  |  |  |  |
Williston Basin [Member] |  |  |  |  |  |  |  |
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations And Disposition [Line Items] |  |  |  |  |  |  |  |
Total estimated proved reserves | MMBoe |  | 66 |  |  |  |  |  |

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