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Description of Business and Segmented Disclosures - Schedule of Revenues by Product (Detail) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023
Upstream |  |
External Sales | $ 57,726 | $ 55,474
Downstream |  |
External Sales | 57,726 | 55,474
Upstream |  |
Upstream |  |
Crude Oil | 21,711 | 20,661
Natural Gas and Other | 1,905 | 2,160
NGLs | 1,024 | 892
External Sales | 24,640 | 23,713
Downstream |  |
Synthetic Crude Oil | 21,711 | 20,661
External Sales | 24,640 | 23,713
Upstream | Oil Sands |  |
Upstream |  |
Crude Oil | 21,183 | 20,022
Natural Gas and Other | 332 | 271
NGLs | 342 | 315
External Sales | 21,857 | 20,608
Downstream |  |
Synthetic Crude Oil | 21,183 | 20,022
External Sales | 21,857 | 20,608
Upstream | Conventional |  |
Upstream |  |
Crude Oil | 207 | 238
Natural Gas and Other | 648 | 988
NGLs | 356 | 262
External Sales | 1,211 | 1,488
Downstream |  |
Synthetic Crude Oil | 207 | 238
External Sales | 1,211 | 1,488
Upstream | Offshore |  |
Upstream |  |
Crude Oil | 321 | 401
Natural Gas and Other | 925 | 901
NGLs | 326 | 315
External Sales | 1,572 | 1,617
Downstream |  |
Synthetic Crude Oil | 321 | 401
External Sales | 1,572 | 1,617
Downstream |  |
Upstream |  |
External Sales | 33,086 | 31,761
Downstream |  |
Gasoline | 14,221 | 12,897
Distillates | 12,116 | 11,364
Asphalt | 1,577 | 1,401
Other Products and Services | 3,358 | 4,200
External Sales | 33,086 | 31,761
Downstream | Synthetic Crude Oil |  |
Upstream |  |
Crude Oil | 1,814 | 1,899
Downstream |  |
Synthetic Crude Oil | 1,814 | 1,899
Downstream | Canadian Refining |  |
Upstream |  |
External Sales | 4,787 | 5,385
Downstream |  |
Gasoline | 429 | 522
Distillates | 1,484 | 1,752
Asphalt | 548 | 537
Other Products and Services | 512 | 675
External Sales | 4,787 | 5,385
Downstream | Canadian Refining | Synthetic Crude Oil |  |
Upstream |  |
Crude Oil | 1,814 | 1,899
Downstream |  |
Synthetic Crude Oil | 1,814 | 1,899
Downstream | U.S. Refining |  |
Upstream |  |
External Sales | 28,299 | 26,376
Downstream |  |
Gasoline | 13,792 | 12,375
Distillates | 10,632 | 9,612
Asphalt | 1,029 | 864
Other Products and Services | 2,846 | 3,525
External Sales | 28,299 | 26,376
Downstream | U.S. Refining | Synthetic Crude Oil |  |
Upstream |  |
Crude Oil | 0 | 0
Downstream |  |
Synthetic Crude Oil | $ 0 | $ 0

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