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Acquisitions and Dispositions - Narrative (Details) $ in Billions				1 Months Ended						3 Months Ended		12 Months Ended
	Nov. 22, 2024 USD ($) shares	Oct. 04, 2023 USD ($)	Oct. 04, 2023 CAD ($)	Jan. 31, 2025 USD ($)	Dec. 31, 2024 USD ($) $ / MMBTU $ / bbl	Nov. 30, 2024 USD ($)	Sep. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Feb. 28, 2022 USD ($)	Dec. 31, 2024 USD ($) $ / MMBTU $ / bbl	Dec. 31, 2023 USD ($)	Dec. 31, 2024 USD ($) $ / MMBTU $ / bbl	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Oct. 04, 2023 CAD ($)
Business Acquisition [Line Items]
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]												Gain (Loss) on Disposition of Property Plant Equipment
Operating revenues and other income												$ 56,953,000,000	$ 58,574,000,000	$ 82,156,000,000
Net Income (Loss)												9,245,000,000	10,957,000,000	18,680,000,000
Loss on forward contracts												$ (50,000,000)	$ 92,000,000	$ (100,000,000)
Subsequent Event
Business Acquisition [Line Items]
Proceeds from sale of business				$ 400,000,000
Assets Acquisition In The Lower 48 Segment
Business Acquisition [Line Items]
Asset acquisition, consideration transferred							$ 236,000,000
QatarEnergy LNG NFS(3)
Business Acquisition [Line Items]
Equity interest of ConocoPhillips					25.00%					25.00%		25.00%		25.00%
North Field South | QatarEnergy LNG NFS(3)
Business Acquisition [Line Items]
Investment, ownership percentage														25.00%
Port Arthur LNG
Business Acquisition [Line Items]
Equity interest of ConocoPhillips					30.00%					30.00%	30.00%	30.00%	30.00%
Port Arthur LNG | Sempra
Business Acquisition [Line Items]
Investment, ownership percentage											70.00%		70.00%
Australia Pacific APLNG
Business Acquisition [Line Items]
Equity interest of ConocoPhillips					47.50%				47.50%	47.50%		47.50%
Additional ownership percentage in equity investment acquired									10.00%
Payments to acquire additional interest									$ 1,400,000,000
Australia Pacific APLNG | Origin Energy
Business Acquisition [Line Items]
Investment, ownership percentage									27.50%
Australia Pacific APLNG | Sinopec
Business Acquisition [Line Items]
Investment, ownership percentage									25.00%
QatarEnergy LNG NFE(4)
Business Acquisition [Line Items]
Equity interest of ConocoPhillips					25.00%					25.00%		25.00%		25.00%
North Field East LNG Project | QatarEnergy LNG NFS(3)
Business Acquisition [Line Items]
Investment, ownership percentage					25.00%					25.00%		25.00%
North Field East LNG Project | QatarEnergy LNG NFE(4)
Business Acquisition [Line Items]
Investment, ownership percentage					12.50%					12.50%		12.50%		12.50%
Indonesia Corridor Block Production Sharing Contract | Subsidiaries Holding Indonesia Assets And Operations
Business Acquisition [Line Items]
Investment, ownership percentage								54.00%
Transasia Pipeline Company | Subsidiaries Holding Indonesia Assets And Operations
Business Acquisition [Line Items]
Investment, ownership percentage								35.00%
Previous Dispositions | Lower 48
Business Acquisition [Line Items]
Contingent payment calculation, monthly payment					$ 7,000,000					$ 7,000,000		$ 7,000,000
Contingent payment calculation, threshold U.S. Henry Hub price | $ / MMBTU					3.20					3.20		3.20
Previous Dispositions | Canada
Business Acquisition [Line Items]
Contingent payment calculation, cost per one Canadian dollar					6,000,000					6,000,000		6,000,000
Threshold average crude price per barrel | $ / bbl					52					52		52
Previous Dispositions | Canada and Lower 48
Business Acquisition [Line Items]
Disposal group, including discontinued operation, contingent payment													$ 7,000,000	$ 451,000,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Certain Noncore Assets | Lower 48
Business Acquisition [Line Items]
Proceeds from sale of business														680,000,000
Net carrying value														680,000,000
Disposal group including discontinued operation, net carrying value, PP&E														818,000,000
Disposal group, including discontinued operation, liabilities														145,000,000
Before-tax gain (loss) on disposition														0
Disposal group including discontinued operation, net carrying value, asset														825,000,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Subsidiaries Holding Indonesia Assets And Operations
Business Acquisition [Line Items]
Proceeds from sale of business								$ 731,000,000
Net carrying value								200,000,000
Disposal group including discontinued operation, net carrying value, PP&E								300,000,000
Before-tax gain (loss) on disposition								534,000,000
Gain (loss) on disposal, net of tax								462,000,000
Disposal group including discontinued operation, net carrying value, cash and cash equivalents								200,000,000
Disposal group, including discontinued operation, asset retirement obligation								$ 100,000,000
Disposal group, including discontinued operation, income (loss) before taxes														$ 138,000,000
Disposal Group, Held-for-sale, Not Discontinued Operations | Certain Noncore Assets | Lower 48
Business Acquisition [Line Items]
Proceeds from sale of business					$ 235,000,000
Net carrying value					235,000,000					$ 235,000,000		$ 235,000,000
Disposal group including discontinued operation, net carrying value, PP&E					251,000,000					251,000,000		251,000,000
Disposal group, including discontinued operation, liabilities					16,000,000					16,000,000		16,000,000
Marathon Oil Corporation
Business Acquisition [Line Items]
Total consideration	$ 16,500,000,000					$ 16,507,000,000
Business acquisition, entity shares issued per acquiree share | shares	0.255
Proved properties	$ 13,200,000,000
Unproved properties	10,800,000,000
Business Acquisition, Transaction Costs					$ 545,000,000					$ 545,000,000		545,000,000
Business Acquisition, Transaction Costs, Employee Severance	328,000,000
Operating revenues and other income												677,000,000
Net Income (Loss)												$ 66,000,000
Marathon Oil Corporation | Lower 48
Business Acquisition [Line Items]
Proved properties	12,100,000,000
Marathon Oil Corporation | Equatorial Guinea
Business Acquisition [Line Items]
Proved properties	$ 1,100,000,000
Kuparuk River Unit
Business Acquisition [Line Items]
Interest acquired					5.00%					5.00%		5.00%
Prudhoe Bay
Business Acquisition [Line Items]
Interest acquired					0.40%					0.40%		0.40%
Alaska Acquisition
Business Acquisition [Line Items]
Total consideration										$ 296,000,000
Surmont
Business Acquisition [Line Items]
Total consideration		$ 3,000,000,000.0	$ 4.1
Proved properties		2,900,000,000
Unproved properties		$ 200,000,000
Operating revenues and other income											$ 572,000,000
Net Income (Loss)											$ 119,000,000
Interest acquired		50.00%													50.00%
Interest subsequently acquired		100.00%													100.00%
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		$ 2,000,000.0
Business acquisition, threshold		52
Contingent consideration, outcome, high		$ 300,000,000
Business acquisition, contingent payments												$ 158,000,000
Surmont | Foreign Exchange Forward
Business Acquisition [Line Items]
Loss on forward contracts													$ 112,000,000

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