Transactions with associates companies - Additional information (Details)	12 Months Ended
Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Disclosure Of Transactions with associates companies [Line Items]
LIBOR interest rate on accounts receivable	6.25%
Related parties [member]
Disclosure Of Transactions with associates companies [Line Items]
Amounts receivable, related party transactions	$ 3,000	$ 7,000
Minera Yanacocha S.R.L. [Member]
Disclosure Of Transactions with associates companies [Line Items]
Royalty percentage	3

The amounts receivable resulting from related party transactions. [Refer: Related parties [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2021-01-01
-Paragraph 20
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2021-en-r&anchor=para_20&doctype=Standard
-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 24
-IssueDate 2021-01-01
-Paragraph 18
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=24&code=ifrs-tx-2021-en-r&anchor=para_18_b&doctype=Standard
-URIDate 2021-03-24

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