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v3.19.1

Revenue from sales (Details 1) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Other operating income (expense) | $ (5,012) | $ (13,589) | $ 18,957
Minera Yanacocha SRL and subsidiary [Member] |  |  |
Other operating income (expense) | 21,965 | 21,870 | 17,713
Sales of copper and silver [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |
Other operating income (expense) | 20,442 | 17,509 | 8,136
Other [Member] | Minera Yanacocha SRL and subsidiary [Member] |  |  |
Other operating income (expense) | $ 1,523 | $ 4,361 | $ 9,577

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- Definition The amount of operating income (expense) that the entity does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_85&doctype=Standard -URIDate 2018-03-16 + Details
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