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Acquisitions and Dispositions - Schedule of Business Combination - Marathon Oil (Details) - USD ($) $ / shares in Units, $ in Millions |  | 1 Months Ended
--- | --- | ---
Nov. 22, 2024 | Nov. 30, 2024
Business Combination [Line Items] |  |
Share price (in dollars per share) | $ 111.93 |
Marathon Oil Corporation |  |
Business Combination [Line Items] |  |
Value of ConocoPhilips common stock issued |  | $ 15,972
Cash consideration |  | 451
Value attributable to Marathon Oil share-based awards |  | 67
Other liabilities incurred |  | 17
Total consideration | $ 16,500 | $ 16,507
Additional shares of ConocoPhillips common stock issued as consideration (in shares) | 143,000,000 |
Common stock, number of Marathon Oil shares received for each share of ConocoPhillips common stock | 0.255 |

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