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Acquisitions and Dispositions - Narrative (Details) $ in Billions |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 04, 2023 USD ($) | Oct. 04, 2023 CAD ($) | Sep. 30, 2022 USD ($) | Mar. 31, 2022 USD ($) | Feb. 28, 2022 USD ($) | Feb. 28, 2021 USD ($) | Jan. 31, 2021 USD ($) | Dec. 31, 2023 USD ($) $ / bbl $ / MMBTU | Mar. 31, 2021 USD ($) | Dec. 31, 2021 USD ($) a | Dec. 31, 2023 USD ($) $ / bbl $ / MMBTU | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) a | Oct. 04, 2023 CAD ($) | Mar. 31, 2023 | Dec. 31, 2020 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  |  |  |  |  |  |  |  | Gain (Loss) on Disposition of Property Plant Equipment |  |  |  |  |
Foreign currency transaction (gain) loss |  |  |  |  |  |  |  |  |  |  | $ 92,000,000 | $ (100,000,000) | $ (22,000,000) |  |  |
Operating revenues and other income |  |  |  |  |  |  |  |  |  |  | 58,574,000,000 | 82,156,000,000 | 48,349,000,000 |  |  |
Net Income (Loss) |  |  |  |  |  |  |  |  |  |  | 10,957,000,000 | 18,680,000,000 | 8,079,000,000 |  |  |
Income tax provision (benefit) |  |  |  |  |  |  |  |  |  |  | $ 5,331,000,000 | 9,548,000,000 | 4,633,000,000 |  |  |
Lower 48 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Before-tax gain (loss) on disposition |  |  |  |  |  |  |  |  |  | $ 58,000,000 |  |  |  |  |  |
Proceeds from sale of business |  |  |  |  |  |  |  |  |  | 250,000,000 |  |  |  |  |  |
Previous Dispositions | Lower 48 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent payment calculation, threshold U.S. Henry Hub price | $ / MMBTU |  |  |  |  |  |  |  | 3.20 |  |  | 3.20 |  |  |  |  |
Contingent payment calculation, monthly payment |  |  |  |  |  |  |  | $ 7,000,000 |  |  | $ 7,000,000 |  |  |  |  |
Previous Dispositions | Canada and Lower 48 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal group, including discontinued operation, contingent payment |  |  |  |  |  |  |  |  |  |  | $ 7,000,000 | 451,000,000 | 369,000,000 |  |  |
Previous Dispositions | Canada |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent payment calculation, cost per one Canadian dollar |  |  |  |  |  |  |  | 6,000,000 |  |  | 6,000,000 |  |  |  |  |
Threshold average crude price per barrel | $ / bbl |  |  |  |  |  |  |  | 52 |  |  | 52 |  |  |  |  |
Barossa Project | Asia Pacific |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Before-tax gain (loss) on disposition |  |  |  |  |  |  |  |  | $ 200,000,000 |  |  |  |  |  |  |
Receivable in dispute |  |  |  |  |  |  |  |  | 200,000,000 |  |  |  |  |  |  | $ 200,000,000
Noncore Exploration Interests |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Before-tax gain (loss) on disposition |  |  |  |  |  |  |  |  |  | $ (179,000,000) |  |  |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Certain Noncore Assets | Lower 48 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Before-tax gain (loss) on disposition |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |
Proceeds from sale of business |  |  |  |  |  |  |  |  |  |  |  | 680,000,000 |  |  |  |
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 |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Subsidiaries Holding Indonesia Assets And Operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Before-tax gain (loss) on disposition |  |  |  | $ 534,000,000 |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |
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% |  |  |  |
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% |
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% |  |  |  |  |
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% |  |  |  |  |  |  |  |  |  |  |
North Field East LNG Project | QatarEnergy LNG NFS(3) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investment, ownership percentage |  |  |  |  |  |  |  | 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% |  |  |  |
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% |  |  |  |  |  |  |  |  |  |  |  |
QatarEnergy LNG NFE(4) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest of ConocoPhillips |  |  |  |  |  |  |  | 25.00% |  |  | 25.00% | 25.00% |  |  |  |
Surmont |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest acquired | 50.00% |  |  |  |  |  |  |  |  |  |  |  |  | 50.00% |  |
Interest subsequently acquired | 100.00% |  |  |  |  |  |  |  |  |  |  |  |  | 100.00% |  |
Total consideration | $ 3,005,000,000 | $ 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 | 52 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration, outcome, low | $ 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration, outcome, high | 300,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |
Surmont | Foreign Exchange Forward |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency transaction (gain) loss | $ 112,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concho Resources Incorporated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration |  |  |  |  |  |  | $ 13,100,000,000 |  |  |  |  |  |  |  |  |
Operating revenues and other income |  |  |  |  |  |  |  |  |  |  |  |  | 6,571,000,000 |  |  |
Net Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |  | 2,330,000,000 |  |  |
Share exchange ratio |  |  |  |  |  |  | 1.46 |  |  |  |  |  |  |  |  |
Transaction Cost |  |  |  |  |  |  |  |  | $ 157,000,000 |  |  |  | 157,000,000 |  |  |
Concho Resources Incorporated | Commodity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Before tax loss |  |  |  |  |  |  |  |  |  |  |  |  | 305,000,000 |  |  |
After tax loss |  |  |  |  |  |  |  |  |  |  |  |  | 233,000,000 |  |  |
Concho Resources Incorporated | Concho Resources Inc. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income tax provision (benefit) |  |  |  |  |  | $ 75,000,000 |  |  |  |  |  |  |  |  |  |
Shell Permian Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total consideration |  |  |  |  |  |  |  |  |  |  |  |  | 8,600,000,000 |  |  |
Transaction Cost |  |  |  |  |  |  |  |  |  |  |  |  | $ 44,000,000 |  |  |
Area of land | a |  |  |  |  |  |  |  |  |  | 225,000 |  |  | 225,000 |  |  |

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