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Cash and Cash Equivalents (Details) - CAD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Subclassifications of assets, liabilities and equities [abstract]      
Cash $ 183.9 $ 278.7  
Cash in escrow 0.0 4.5  
Unrestricted investments 10.0 6.3  
Cash and deposits 193.9 289.5  
Bank indebtedness (7.2) (4.7)  
Cash and cash equivalents $ 186.7 $ 284.8 $ 204.0