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Fair Value Measurement - Narrative (Details) $ in Billions		12 Months Ended
	Oct. 04, 2023 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Oct. 04, 2023 CAD ($)
Schedule of Equity Method Investments [Line Items]
Carrying value of equity method investment		$ 7,905,000,000	$ 7,493,000,000
Impairments		$ 14,000,000	$ (12,000,000)	$ 674,000,000
Surmont
Schedule of Equity Method Investments [Line Items]
Interest acquired	50.00%				50.00%
Business acquisition, maximum payment	$ 320,000,000				$ 0.4
Business acquisition, term	5 years				5 years
Business acquisition, cost per every dollar exceeding threshold	$ 2,000,000
Business acquisition, threshold	52
APLNG
Schedule of Equity Method Investments [Line Items]
Equity interest of ConocoPhillips				10.00%
Carrying value of equity method investment				$ 1,645,000,000
APLNG | Equity Method Investments
Schedule of Equity Method Investments [Line Items]
Fair value, equity method investments				5,574,000,000
Impairments				$ 688,000,000

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