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Acquisitions and Dispositions - Narrative (Details) $ in Billions			3 Months Ended	9 Months Ended
	Oct. 04, 2023 USD ($)	Oct. 04, 2023 CAD ($)	Dec. 31, 2024 USD ($)	Sep. 30, 2024 USD ($)	Oct. 04, 2023 CAD ($)
Alaska Acquisition | Forecast | Subsequent Event
Asset Acquisition [Line Items]
Business acquisition, consideration			$ 300,000,000
Kuparuk River | Forecast | Subsequent Event
Asset Acquisition [Line Items]
Percentage of interest acquired			5.00%
Kuparuk River | Forecast | Subsequent Event | Minimum
Asset Acquisition [Line Items]
Business acquisition, total percentage owned			94.00%
Kuparuk River | Forecast | Subsequent Event | Maximum
Asset Acquisition [Line Items]
Business acquisition, total percentage owned			99.00%
Prudhoe Bay | Forecast | Subsequent Event
Asset Acquisition [Line Items]
Percentage of interest acquired			0.40%
Business acquisition, total percentage owned			36.50%
Surmont
Asset Acquisition [Line Items]
Percentage of interest acquired	50.00%				50.00%
Business acquisition, consideration	$ 2,955,000,000	$ 4.1
Business acquisition, maximum payment	$ 320,000,000				$ 0.4
Business acquisition, contingent payment term	5 years	5 years
Business acquisition, cost per every dollar exceeding threshold	$ 2,000,000
Business acquisition, threshold (dollars per barrel)	52
Contingent consideration, outcome, high	$ 300,000,000
Business acquisition, contingent payments				$ 147,000,000
Proved properties	2,900,000,000
Unproved properties	$ 200,000,000

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