Supplemental Information on Oil and Gas Operations (Unaudited) (Costs Incurred) (Details) - USD ($) $ in Millions	12 Months Ended
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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Costs incurred, including capitalized costs and costs charged to expense, associated with the acquisition of oil and gas properties that have proved reserves.

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Costs incurred, including capitalized costs and costs charged to expense, associated with the acquisition of oil and gas properties that have unproved reserves.

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Development costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities.

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Exploration costs incurred, including capitalized costs and costs charged to expense, in oil and gas activities.

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Amount of costs incurred related to oil and gas property acquisition, exploration and development activities, including capitalized costs and costs charged to expense.

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