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Supplemental Information on Oil and Gas Operations (Unaudited) (Costs Incurred) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Property acquisition costs: |  |  |
Proved properties | $ 2 | $ 1,760 | $ 7,017
Unproved properties | 63 | 803 | 2,381
Exploration costs | 534 | 472 | 212
Development costs | 3,160 | 2,132 | 1,643
Costs incurred | $ 3,759 | $ 5,167 | $ 11,253

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