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Trade and Other Payables - Summary of Trade and Other Payables (Details) - CAD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Subclassifications of assets, liabilities and equities [abstract]    
Trade accounts payable $ 217.6 $ 225.5
Employee and payroll liabilities 277.4 266.7
Accrued liabilities 81.0 84.2
Trade and other payables $ 576.0 $ 576.4