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Provisions and Other Liabilities - Summary of Provisions and Other Liabilities (Detail) - CAD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of other provisions [line items] |  |
Derivative liabilities (net of current portion of $15 (2022 – $10)) | $ 18 | $ 26
QB2 variable consideration to IMSA (Note 12) | 115 | 114
Downstream pipeline take-or-pay toll commitment | 270 | 0
Other liabilities | 89 | 97
Other liabilities and provisions | 4,994 | 3,517
Settlement payables (Note 31(b)) | 15 | 10
Non-current provision for decommissioning, restoration and rehabilitation costs | 3,851 | 2,805
Other IMSA payable |  |
Disclosure of other provisions [line items] |  |
Other | 66 | 68
Neptune Bulk Terminals Inc. |  |
Disclosure of other provisions [line items] |  |
Obligation to Neptune Bulk Terminals | 207 | 189
Preferential Dividend |  |
Disclosure of other provisions [line items] |  |
ENAMI preferential dividend liability (Note 12) | $ 444 | $ 286

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