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Other non-current liabilities (Details) - CAD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Subclassifications of assets, liabilities and equities [abstract]    
Provisions $ 288 $ 286
Long-term disability benefits obligation 271 269
Derivative liabilities 863 607
Joint venture obligation 0 252
Other 224 303
Total other non-current liabilities $ 1,646 $ 1,717