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Accounts Payable and Accrued Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Subclassifications of assets, liabilities and equities [abstract]      
Trade accounts payable and accrued liabilities   $ 147.6 $ 137.6
Royalties payable   2.2 3.0
Share-based compensation liability (note 16)   18.3 13.1
Less: Current portion of decommissioning liability 1   8.5 3.3
Current portion of equipment financing obligations   0.4 0.4
Derivative liabilities (note 20) $ 4.2 0.0  
Accounts payable and accrued liabilities   $ 181.2 $ 157.4