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Segmented Information - Segmented Assets (Details) - CAD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Disclosure of operating segments [line items] |  |
Assets | $ 75,955 | $ 76,142
Operating segments | North America |  |
Disclosure of operating segments [line items] |  |
Assets | 30,058 | 31,135
Operating segments | North Sea |  |
Disclosure of operating segments [line items] |  |
Assets | 602 | 378
Operating segments | Offshore Africa |  |
Disclosure of operating segments [line items] |  |
Assets | 1,380 | 1,322
Operating segments | Other |  |
Disclosure of operating segments [line items] |  |
Assets | 32 | 54
Operating segments | Oil Sands Mining and Upgrading |  |
Disclosure of operating segments [line items] |  |
Assets | 42,865 | 42,102
Operating segments | Midstream and Refining |  |
Disclosure of operating segments [line items] |  |
Assets | 856 | 979
Head Office |  |
Disclosure of operating segments [line items] |  |
Assets | $ 162 | $ 172

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