XML 244 R115.htm IDEA: XBRL DOCUMENT v3.20.1
Basis for preparation, consolidation and accounting policies - Reclassifications of comparative information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of basis for preparation, consolidation and accounting policies [Line Items]      
Sales $ 821,930 $ 1,106,329 $ 1,187,206
Cost applicable to sales (512,874) (613,381) (604,650)
Trade and other payables 166,244 188,084  
Income tax payable 5,650 1,760  
Royalties expenses 12,832 21,388 30,884
Minera Yanacocha SRL and subsidiary [Member]      
Disclosure of basis for preparation, consolidation and accounting policies [Line Items]      
Sales 734,526 658,653 670,905
Cost applicable to sales (692,721) (619,424) (772,647)
Trade and other payables 76,484 83,464  
Income tax payable 23,153 3,552  
Royalties expenses   23,000 26,000
Minera Yanacocha SRL and subsidiary [Member] | As previously reported      
Disclosure of basis for preparation, consolidation and accounting policies [Line Items]      
Sales   635,393 645,176
Cost applicable to sales   (596,164) (746,918)
Trade and other payables   87,016  
Minera Yanacocha SRL and subsidiary [Member] | Reclassifications      
Disclosure of basis for preparation, consolidation and accounting policies [Line Items]      
Sales   23,260 25,729
Cost applicable to sales   (23,260) (25,729)
Trade and other payables   (3,552)  
Income tax payable   3,552  
Sociedad Minera Cerro Verde S.A.A. [Member]      
Disclosure of basis for preparation, consolidation and accounting policies [Line Items]      
Sales 2,890,066 3,054,026 3,202,931
Royalties expenses $ 6,828 $ 7,904 $ 8,335