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Supplemental Cash Flow Information
 12 Months Ended
Dec. 31, 2017
Disclosure of Cash Flow Statement [Abstract]  
Supplemental Cash Flow Information
15.
SUPPLEMENTAL CASH FLOW INFORMATION
Changes in working capital and income taxes received or paid for the years ended:
 
December 31,

December 31,

 
2017
2016
Amounts receivable
$14.0

($5.7
)
Inventory
(15.9
)
(16.1
)
Advances and prepaid expenses
(4.3
)
3.8

Accounts payable and accrued liabilities
(12.1
)
(7.5
)
Income taxes (paid) refunded
(1.5
)
13.2

 
($19.8
)
($12.3
)
 
 
 
Interest received

$2.5
$2.1
Other items for the years ended:
 
December 31,
December 31,
 
2017
2016
Unrealized loss (gain) on non-hedged derivatives

$0.3


($1.6
)
Gain on prepayment option fair value adjustment
—

(9.5
)
Reduction of obligation to renounce flow-through exploration expenditures
(2.3
)
(1.3
)
Loss on disposal of assets
1.9

4.6

Payment of transaction costs incurred by Richmont Mines (note 5)
(5.9
)
—

Share-based payments related to Richmont Mines transaction (note 5)
1.3

—

Other non-cash items
0.8

(2.3
)
 
($3.9
)
($10.1
)