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Accounts Payable and Accrued Liabilities
12 Months Ended
Dec. 31, 2021
Subclassifications of assets, liabilities and equities [abstract]  
Accounts Payable and Accrued Liabilities
9.ACCOUNTS PAYABLE AND ACCRUED LIABILITIES
December 31, 2021December 31, 2020
Trade accounts payable and accrued liabilities$137.6 $117.7 
Royalties payable3.0 3.3 
Share-based compensation liability13.1 9.9 
Current portion of decommissioning liability3.3 — 
Current portion of equipment financing obligations0.4 0.5 
$157.4 $131.4