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Investments in associates (Details 1) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Disclosure of Investments in associates [Line Items]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method	$ 13,207	$ (365,321)	$ (173,375)
Compania Minera Coimolache S.A. [Member]
Disclosure of Investments in associates [Line Items]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method	21,271	23,514	16,617
Minera Yanacocha S.R.L. [Member]
Disclosure of Investments in associates [Line Items]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method	(76,585)	(455,598)	(196,510)
Sociedad Minera Cerro Verde S.A.A. [Member]
Disclosure of Investments in associates [Line Items]
Share of profit (loss) from continuing operations of associates and joint ventures accounted for using equity method	$ 68,521	$ 66,763	$ 6,518

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- Definition

The entity's share of the profit (loss) from continuing operations of associates and joint ventures accounted for using the equity method. [Refer: Associates [member]; Continuing operations [member]; Investments accounted for using equity method; Joint ventures [member]; Profit (loss) from continuing operations]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2017-01-01
-Paragraph B16
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_B16_a&doctype=Appendix&seq=2
-URIDate 2017-03-09

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