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Other Long-Term Assets - Schedule of other long-term assets (Details) - CAD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Subclassifications of assets, liabilities and equities [abstract]    
Long-term prepayments, contracts and other $ 279 $ 269
Prepaid cost of service toll 179 199
Long-term inventory 141 137
Risk management 13 9
Other assets 612 614
Less: current portion 71 61
Other long-term assets $ 541 $ 553