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Other Gain (Loss)
 12 Months Ended
Dec. 31, 2018
Other Gain (Loss) [Abstract]  
Other (Loss) Gain
13.
OTHER LOSS
Other loss recorded in net (loss) earnings for the years ended:
 
December 31,
December 31,
 
2018
2017
Reduction of obligation to renounce flow-through exploration expenditures
$0.6

$2.3

Unrealized loss on non-hedging derivatives
(0.4
)
(0.3
)
Loss on disposal of assets
(6.1
)
(1.9
)
Transaction costs related to the Richmont acquisition (note 5)
—

(3.8
)
Share-based compensation related of replacement awards related to Richmont (note 5)
—

(1.3
)
Other
(2.5
)
1.9

 
($8.4
)
($3.1
)