FINANCIAL RISK MANAGEMENT (Details) - Credit risk [member] - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
CREDIT RISK EXPOSURE
Total financial instrument exposure to credit risk	$ 243.3	$ 240.9
Cash and cash equivalents
CREDIT RISK EXPOSURE
Total financial instrument exposure to credit risk	216.2	185.9
Trade receivables
CREDIT RISK EXPOSURE
Total financial instrument exposure to credit risk	27.1	37.1
Gold price options
CREDIT RISK EXPOSURE
Total financial instrument exposure to credit risk		17.6
Copper forward contracts
CREDIT RISK EXPOSURE
Total financial instrument exposure to credit risk		$ 0.3

The amount that best represents the maximum exposure to credit risk without taking into account any collateral held or other credit enhancements (for example, netting agreements that do not qualify for offset in accordance with IAS 32). [Refer: Credit risk [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2018-01-01
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 35K
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_35K_a&doctype=Standard
-URIDate 2017-03-09

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2018-01-01
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 36
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_36_a&doctype=Standard&book=B
-URIDate 2017-03-09

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant