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Fair Value Measurement - Narrative (Details) - Surmont $ in Billions | 1 Months Ended | 9 Months Ended | 24 Months Ended |
--- | --- | --- | --- | ---
Oct. 31, 2023 USD ($) | Sep. 30, 2025 USD ($) | Sep. 30, 2025 USD ($) | Oct. 31, 2023 CAD ($) | Oct. 31, 2023 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Percentage of interest acquired |  |  |  | 50.00% | 50.00%
Business acquisition, maximum payment |  |  |  | $ 0.4 | $ 320,000,000
Business combination, contingent, consideration arrangements, term |  |  |  | 5 years | 5 years
Business acquisition, cost per every dollar exceeding threshold | $ 2,000,000 |  |  |  |
Business acquisition, threshold (dollars per barrel) |  |  |  |  | 52
Contingent consideration, outcome, high |  |  |  |  | $ 300,000,000
Contingent consideration payments |  | $ 77,000,000 | $ 234,000,000 |  |

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