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Acquisitions and Dispositions - Narrative (Details) |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jan. 15, 2021 USD ($) | Sep. 30, 2022 USD ($) | Mar. 31, 2022 USD ($) | Feb. 28, 2022 USD ($) | Feb. 28, 2021 USD ($) | Jan. 31, 2021 USD ($) | Aug. 31, 2020 USD ($) a | May 31, 2020 USD ($) | Mar. 31, 2020 USD ($) | Feb. 29, 2020 USD ($) | Mar. 31, 2021 USD ($) | Dec. 31, 2021 USD ($) a | Dec. 31, 2022 USD ($) $ / MMBTU $ / bbl | Dec. 31, 2021 USD ($) a | Dec. 31, 2021 USD ($) a | Dec. 31, 2020 USD ($) | May 27, 2020 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  |  |  |  |  |  |  |  |  |  | Gain (loss) from dispositions |  |  |  |
Capitalized costs, proved properties |  |  |  |  |  |  |  |  |  |  |  | $ 114,274,000,000 | $ 119,609,000,000 | $ 114,274,000,000 | $ 114,274,000,000 |  |
Capitalized costs, unproved properties |  |  |  |  |  |  |  |  |  |  |  | 10,993,000,000 | 7,325,000,000 | 10,993,000,000 | 10,993,000,000 |  |
Income tax provision |  |  |  |  |  |  |  |  |  |  |  |  | 9,548,000,000 |  | 4,633,000,000 | $ (485,000,000) |
Total revenues and other Income |  |  |  |  |  |  |  |  |  |  |  |  | 82,156,000,000 |  | 48,349,000,000 | 19,256,000,000 |
Net Income (Loss) attributable to ConocoPhillips |  |  |  |  |  |  |  |  |  |  |  |  | 18,680,000,000 |  | 8,079,000,000 | (2,701,000,000) |
Gain (loss) from dispositions |  |  |  |  |  |  |  |  |  |  |  |  | 1,077,000,000 |  | 486,000,000 | 549,000,000 |
Asset retirement obligations |  |  |  |  |  |  |  |  |  |  |  | 5,754,000,000 | 6,401,000,000 | 5,754,000,000 | 5,754,000,000 |  |
Assets Acquisition In The Lower 48 Segment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset acquisition, consideration transferred |  | $ 236,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Lower 48 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Before-tax gain (loss) on disposition |  |  |  |  |  |  |  |  |  |  |  | 58,000,000 |  |  |  |  |
Proceeds from asset dispositions |  |  |  |  |  |  |  |  |  |  |  | 250,000,000 |  |  |  |  |
Canada | Additional Montney acreage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Asset acquisition, assets acquired and liabilities assumed, net |  |  |  |  |  |  | $ 382,000,000 |  |  |  |  |  |  |  |  |  |
Asset acquisition, liabilities assumed |  |  |  |  |  |  | $ 31,000,000 |  |  |  |  |  |  |  |  |  |
Asset acquisition, undeveloped acreage acquired | a |  |  |  |  |  |  | 140,000 |  |  |  |  |  |  |  |  |  |
Oil and gas, net underdeveloped acreage | a |  |  |  |  |  |  | 295,000 |  |  |  |  |  |  |  |  |  |
Asset acquisition, percent of working interest acquired |  |  |  |  |  |  | 100.00% |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, additions |  |  |  |  |  |  | $ 490,000,000 |  |  |  |  |  |  |  |  |  |
Asset retirement obligations |  |  |  |  |  |  | $ 77,000,000 |  |  |  |  |  |  |  |  |  |
Barossa Project | Asia Pacific |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Before-tax gain (loss) on disposition |  |  |  |  |  |  |  |  |  |  | $ 200,000,000 |  |  |  |  |  |
Receivable in dispute |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200,000,000 |
Proceeds from asset dispositions |  |  |  |  |  |  |  | $ 200,000,000 |  |  |  |  |  |  |  |  |
Noncore Exploration Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Before-tax gain (loss) on disposition |  |  |  |  |  |  |  |  |  |  |  | (179,000,000) |  |  |  |  |
Waddell Ranch | Lower 48 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from asset dispositions |  |  |  |  |  |  |  |  |  | $ 184,000,000 |  |  |  |  |  |  |
Gain (loss) from dispositions |  |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |
Niobrara | Lower 48 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal group including discontinued operation, net carrying value, asset |  |  |  |  |  |  |  |  | $ 397,000,000 |  |  |  |  |  |  |  |
Disposal group including discontinued operation, net carrying value, PP&E |  |  |  |  |  |  |  |  | 433,000,000 |  |  |  |  |  |  |  |
Proceeds from asset dispositions |  |  |  |  |  |  |  |  | 359,000,000 |  |  |  |  |  |  |  |
Disposal group including discontinued operation, net carrying value, ARO |  |  |  |  |  |  |  |  | 34,000,000 |  |  |  |  |  |  |  |
Gain on disposition of oil and gas property |  |  |  |  |  |  |  |  | $ 38,000,000 |  |  |  |  |  |  |  |
Losses before income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25,000,000 |
Australia West Assets | Asia Pacific |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal group including discontinued operation, net carrying value, asset |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 200,000,000
Disposal group including discontinued operation, net carrying value, PP&E |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,300,000,000
Disposal group including discontinued operation, net carrying value, cash and cash equivalents |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 500,000,000
Proceeds from asset dispositions |  |  |  |  |  |  |  | $ 765,000,000 |  |  |  |  |  |  |  |  |
Disposal group including discontinued operation, net carrying value, ARO |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 700,000,000
Gain on disposition of oil and gas property |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 587,000,000 |
Disposal group including discontinued operation, net carrying value, other assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 100,000,000
Disposal group including discontinued operation, net carrying value, deferred tax liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 300,000,000
Disposal group including discontinued operation, net carrying value, other liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 200,000,000
Before-tax earnings on subsidiaries sold |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 851,000,000 |
Certain Noncore Assets | Lower 48 | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Before-tax gain (loss) on disposition |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |
Net carrying value |  |  |  |  |  |  |  |  |  |  |  |  | 680,000,000 |  |  |  |
Disposal group including discontinued operation, net carrying value, asset |  |  |  |  |  |  |  |  |  |  |  |  | 825,000,000 |  |  |  |
Disposal group including discontinued operation, net carrying value, PP&E |  |  |  |  |  |  |  |  |  |  |  |  | 818,000,000 |  |  |  |
Disposal group, including discontinued operation, liabilities |  |  |  |  |  |  |  |  |  |  |  |  | 145,000,000 |  |  |  |
Proceeds from asset dispositions |  |  |  |  |  |  |  |  |  |  |  |  | 680,000,000 |  |  |  |
Subsidiaries Holding Indonesia Assets And Operations | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Before-tax gain (loss) on disposition |  |  | $ 534,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net carrying value |  |  | 200,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal group including discontinued operation, net carrying value, PP&E |  |  | 300,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  | 604,000,000 | 394,000,000 |
Proceeds from asset dispositions |  |  | $ 731,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Previous Dispositions | Canada and Lower 48 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal group, including discontinued operation, contingent payment |  |  |  |  |  |  |  |  |  |  |  |  | 451,000,000 |  | 369,000,000 | $ 0 |
Previous Dispositions | Lower 48 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent payment calculation, monthly payment |  |  |  |  |  |  |  |  |  |  |  |  | $ 7,000,000 |  |  |  |
Contingent payment calculation, threshold U.S. Henry Hub price | $ / MMBTU |  |  |  |  |  |  |  |  |  |  |  |  | 3.20 |  |  |  |
Previous Dispositions | Canada |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent payment calculation, cost per one Canadian dollar |  |  |  |  |  |  |  |  |  |  |  |  | 6,000,000 |  |  |  |
Threshold average crude price per barrel | $ / bbl |  |  |  |  |  |  |  |  |  |  |  |  | 52 |  |  |  |
Australia Pacific APLNG |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional ownership percentage in equity investment acquired |  |  |  | 10.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire additional interest |  |  |  | $ 1,400,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage in equity investment |  |  |  | 47.50% |  |  |  |  |  |  |  |  | 47.50% |  |  |  |
QG8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage in equity investment |  |  |  |  |  |  |  |  |  |  |  |  | 25.00% |  |  |  |
Origin Energy | Australia Pacific APLNG |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment, ownership percentage |  |  |  | 27.50% |  |  |  |  |  |  |  |  |  |  |  |  |
Sinopec | Australia Pacific APLNG |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment, ownership percentage |  |  |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiaries Holding Indonesia Assets And Operations | Transasia Pipeline Company |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment, ownership percentage |  |  | 35.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Subsidiaries Holding Indonesia Assets And Operations | Indonesia Corridor Block Production Sharing Contract |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment, ownership percentage |  |  | 54.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |
QatarEnergy | QG8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage in equity investment |  |  |  |  |  |  |  |  |  |  |  |  | 75.00% |  |  |  |
QG8 | North Field East LNG Project |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment, ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  | 12.50% |  |  |  |
Concho Resources Incorporated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration | $ 13,100,000,000 |  |  |  |  | $ 13,100,000,000 |  |  |  |  |  |  |  | 13,125,000,000 |  |  |
Exchange ratio | 1.46 |  |  |  |  | 1.46 |  |  |  |  |  |  |  |  |  |  |
Capitalized costs, proved properties | $ 11,800,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Capitalized costs, unproved properties | $ 6,900,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transaction Cost |  |  |  |  |  |  |  |  |  |  | $ 157,000,000 |  |  | 157,000,000 |  |  |
Total revenues and other Income |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,571,000,000 |  |  |
Net Income (Loss) attributable to ConocoPhillips |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,330,000,000 |  |  |
Concho Resources Incorporated | Commodity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain (Loss) on price risk derivative instruments not designated as hedging instruments, before tax |  |  |  |  |  |  |  |  |  |  |  |  |  | (305,000,000) |  |  |
Gain (Loss) on price risk derivative instruments not designated as hedging instruments, after tax |  |  |  |  |  |  |  |  |  |  |  |  |  | (233,000,000) |  |  |
Concho Resources Incorporated | Concho Resources Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax provision |  |  |  |  | $ 75,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Oil and gas properties, impairment loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10,500,000,000 |  |
Goodwill, impairment loss |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,900,000,000 |  |
Shell Permian Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,600,000,000 |  |
Capitalized costs, proved properties |  |  |  |  |  |  |  |  |  |  |  | 4,200,000,000 |  | 4,200,000,000 | 4,200,000,000 |  |
Capitalized costs, unproved properties |  |  |  |  |  |  |  |  |  |  |  | $ 4,300,000,000 |  | $ 4,300,000,000 | 4,300,000,000 |  |
Transaction Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 44,000,000 |  |
Area of land | a |  |  |  |  |  |  |  |  |  |  |  | 225,000 |  | 225,000 | 225,000 |  |

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