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v3.23.3

Decommissioning Liabilities - Additional Information (Detail) $ in Millions | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 CAD ($) | Dec. 31, 2022 CAD ($) | Feb. 28, 2023 CAD ($)
Disclosure of other provisions [line items] |  |  |
Credit-adjusted risk-free rate | 6.10% | 6.10% |
Inflation rate | 0.02 | 0.02 |
Restricted Cash | $ 209 | $ 209 |
BP-Husky Refining LLC |  |  |
Disclosure of other provisions [line items] |  |  |
Carrying value of pre-existing decommissioning liabilities |  |  | $ 2

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