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FINANCIAL INSTRUMENTS - Summary of Derivatives (Details) | 12 Months Ended
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Dec. 31, 2020 USD ($) oz | Dec. 31, 2019 oz
Disclosure of detailed information about financial instruments [line items] |  |
Ounces of gold purchased for collars | oz | 57,000 | 0
Interest rate contracts |  |
Disclosure of detailed information about financial instruments [line items] |  |
Notional amount | $ | $ 0 |

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- Definition The nominal or face amount of a financial instrument, used to calculate payments made on that instrument. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + Details
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