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Cash and Cash Equivalents (Details) - CAD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Cash and Cash Equivalents      
Cash $ 3,141 $ 1,717  
Cash equivalents 343 12  
Cash and Cash Equivalents $ 3,484 $ 1,729 $ 1,980