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Trade and Other Payables (Tables)
12 Months Ended
Dec. 31, 2020
Subclassifications of assets, liabilities and equities [abstract]  
Summary of Trade and Other Payables
December 31
2020
December 31
2019
$
$
Trade accounts payable217.6 225.5 
Employee and payroll liabilities277.4 266.7 
Accrued liabilities81.0 84.2 
Trade and other payables576.0 576.4