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CAPITAL AND FINANCIAL RISK MANAGEMENT - Gold and silver price risk management (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Gold and silver price risk
Capital and financial risk management
Derivatives to hedge metal sales	$ 0	$ 0

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfRiskManagementStrategyRelatedToHedgeAccountingLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of a hedged item, recognised as an asset. [Refer: Hedged items [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2019-01-01
-Paragraph 24B
-Subparagraph a
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_24B_a_i&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_HedgedItemAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_OtherPriceRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: