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DERIVATIVE INSTRUMENTS (Details) - USD ($) $ in Millions | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
DERIVATIVE ASSETS |  |  |
Derivative financial assets |  | $ 0.7 | $ 0.0
DERIVATIVE LIABILITIES |  |  |
Total derivative liabilities |  | 5.5 | 6.0
Unsettled provisionally priced concentrate derivatives, and swap contracts |  |  |
DERIVATIVE LIABILITIES |  |  |
Derivative financial liabilities | [1] | 0.7 | 1.9
Copper price option contract |  |  |
DERIVATIVE ASSETS |  |  |
Derivative financial assets | [2] | 0.7 | 0.0
DERIVATIVE LIABILITIES |  |  |
Derivative financial liabilities | [2] | 0.0 | 4.1
Gold Price Option Contract |  |  |
DERIVATIVE LIABILITIES |  |  |
Derivative financial liabilities | [2] | $ 4.8 | $ 0.0
[1] | Unsettled provisionally priced concentrate derivatives are included within trade and other receivables in the statement of financial position.
[2] | As at December 31, 2018, copper price option contracts are included within prepaids and other in the statement of financial position and gold price option contracts are included within trade and other payables in the statement of financial position. As at December 31, 2017, copper price option contracts are included within trade and other payables in the statement of financial position.

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- Definition The amount of financial assets classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of financial liabilities classified as derivative instruments. [Refer: Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
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