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INVENTORIES - Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Finished Goods |  |
Disclosure of Inventories [Line Items] |  |
Inventory write-down (reversal) | $ 28,100,000 | $ 0
Ore Stockpiles - Current |  |
Disclosure of Inventories [Line Items] |  |
Inventory write-down (reversal) | 9,400,000 | 0
Ore Stockpiles - Non-Current |  |
Disclosure of Inventories [Line Items] |  |
Inventory write-down (reversal) | 101,100,000 | 0
Mine Supplies |  |
Disclosure of Inventories [Line Items] |  |
Inventory write-down (reversal) | $ 4,900,000 | $ 5,700,000

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- Definition The amount of expense recognised related to the write-down of inventories to net realisable value. [Refer: Inventories] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 2 -IssueDate 2021-01-01 -Paragraph 36 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=2&code=ifrs-tx-2021-en-r&anchor=para_36_e&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 98 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_98_a&doctype=Standard -URIDate 2021-03-24 + Details
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