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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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