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SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Change In Non-Cash Operating Working Capital [Abstract] |  |
Trade and other receivables | $ (5.4) | $ 15.6
Inventories | (53.1) | 3.2
Prepaid expenses and other | (0.6) | (1.0)
Trade and other payables | (12.5) | 26.0
Total change in non-cash operating working capital | (71.6) | 43.8
OTHER NON-CASH ADJUSTMENTS |  |
Unrealized gain on share purchase warrants | 0.0 | (1.2)
Unrealized (gain) loss on concentrate contracts | 0.7 | 1.9
Equity settled share-based payment expense | 2.7 | 5.7
Loss (gain) on disposal of assets | 0.3 | (0.3)
Settlement and (gain) loss on revaluation of gold price option contracts | 4.8 | 6.5
Unrealized (gain) loss on gold stream obligation | (11.7) | 21.8
Unrealized (gain) loss on copper forward contracts and copper price option contracts | (4.8) | 4.4
Inventory write-downs | 15.8 | 0.0
Revaluation of CSP's reclamation and closure cost obligation | 1.0 | 0.0
Other non-cash adjustments | 0.2 | 0.2
Total other non-cash adjustments | $ 9.0 | $ 39.0

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- Definition Adjustments for increase (decrease) in trade and other payables to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Trade and other payables; Profit (loss)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2018-01-01 -Paragraph 20 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_20&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of expense arising from equity-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions in which goods or services received did not qualify for recognition as assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 51 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_51_a&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_85&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The gains (losses) on disposals of other non-current assets. [Refer: Other non-current assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 98 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_98&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The increase (decrease) in working capital. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2018-01-01 -Paragraph 20 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2018-03-01&anchor=para_20&doctype=Standard -URIDate 2018-03-16 + Details
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