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Contingencies and Commitments - Narrative (Details) $ in Millions |  | 1 Months Ended | 12 Months Ended | 69 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 02, 2019 USD ($) | Oct. 31, 2020 | Mar. 31, 2019 USD ($) | Aug. 31, 2018 USD ($) | Apr. 30, 2018 USD ($) | Dec. 31, 2017 lawsuit | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | May 10, 2021 USD ($) | Mar. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | Aug. 29, 2019 USD ($)
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Purchase obligation |  |  |  |  |  |  | $ 340 |  |  |  |  |  |
2024 |  |  |  |  |  |  | 7 |  |  |  |  |  |
2025 |  |  |  |  |  |  | 7 |  |  |  |  |  |
2026 |  |  |  |  |  |  | 7 |  |  |  |  |  |
2027 |  |  |  |  |  |  | 7 |  |  |  |  |  |
2028 |  |  |  |  |  |  | 283 |  |  |  |  |  |
2029 and after |  |  |  |  |  |  | 11,000 |  |  |  |  |  |
Total payments under agreement |  |  |  |  |  |  | 26 | $ 26 | $ 27 |  |  |  |
Outer Continental Shelf Lease | Phillips Petroleum Company |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage in equity investment |  | 25.00% |  |  |  |  |  |  |  |  |  |  |
Sale of interest, duration |  | 30 years |  |  |  |  |  |  |  |  |  |  |
Barossa Project | Asia Pacific |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Receivable in dispute |  |  |  |  |  |  |  |  |  |  | $ 200 | $ 200 |
Barossa Project | Asia Pacific | Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Receivable in dispute |  |  |  |  |  |  |  |  |  | $ 200 |  |  |
ConocoPhillips Entities | Several Louisiana parishes and the State of Louisiana against oil and gas companies |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Loss contingency, number of new claims filed | lawsuit |  |  |  |  |  | 22 |  |  |  |  |  |  |
VENEZUELA | ConocoPhillips Versus Petroleos de Venezuela ICISD |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Litigation settlement, amount awarded |  |  | $ 8,700 |  |  |  |  |  |  |  |  |  |
Litigation award reduction |  |  |  |  |  |  |  |  |  |  |  |  | $ 227
Litigation settlement, amount awarded revised |  |  |  |  |  |  | 8,500 |  |  |  |  |  |
VENEZUELA | ConocoPhillips vs Petroleos De Venezuela ICC |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Litigation settlement, amount awarded | $ 33 |  |  | $ 500 | $ 2,000 |  |  |  |  |  |  |  |
Litigation settlement, initial payment term |  |  |  | 90 days |  |  |  |  |  |  |  |  |
Litigation settlement, remaining payment term |  |  |  | 4 years 6 months |  |  |  |  |  |  |  |  |
Proceeds from legal settlements |  |  |  |  |  |  | $ 777 |  |  |  |  |  |

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