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Identification and business activity (Details Textual)
lb in Thousands
 1 Months Ended 12 Months Ended
Dec. 22, 2017
USD ($)
shares
Dec. 31, 2017
USD ($)
lb
bbl
Dec. 31, 2016
USD ($)
lb
Dec. 31, 2015
USD ($)
lb
Disclosure of identification and business activity [Line Items]        
Proceeds from sales of property, plant and equipment, classified as investing activities   $ 1,962,000 $ 7,180,000 $ 5,481,000
Assets   4,332,813,000 4,266,415,000 4,547,181,000
Reversal of impairment loss   (11,770,000) 0 0
Payments to acquire or redeem entity's shares   $ 0 $ 1,210,000 $ 0
Quecher Main project [Member]        
Disclosure of identification and business activity [Line Items]        
Average production capacity | bbl   200,000    
Minera Yanacocha SRL and subsidiary [Member]        
Disclosure of identification and business activity [Line Items]        
Volume of gold produced | lb   530 660 920
Minera Yanacocha SRL and subsidiary [Member] | Treasury shares [member]        
Disclosure of identification and business activity [Line Items]        
Number of shares purchased | shares 63,922,565      
Payments to acquire or redeem entity's shares $ 47,910,585      
Percentage of stock purchased 5.00%      
Newmont Second Capital Corporation [Member] | Minera Yanacocha SRL and subsidiary [Member]        
Disclosure of identification and business activity [Line Items]        
Proportion of ownership interest in subsidiary   54.05%    
S.M.R.L. Chaupiloma Dos de Cajamarca [Member] | Minera Yanacocha SRL and subsidiary [Member]        
Disclosure of identification and business activity [Line Items]        
Royalty rate on net sales   3.00%    
Newmont Mining Corporation [Member] | Minera Yanacocha SRL and subsidiary [Member]        
Disclosure of identification and business activity [Line Items]        
Proportion of ownership interest in subsidiary   100.00%    
Cyprus Climax Metals [Member] | Sociedads Mineras Cerro Verde Saa [Member]        
Disclosure of identification and business activity [Line Items]        
Proportion of ownership interest in subsidiary   53.56%    
SMM Cerro Verde Netherlands B.V [Member] | Sociedads Mineras Cerro Verde Saa [Member]        
Disclosure of identification and business activity [Line Items]        
Proportion of ownership interests held by non-controlling interests   21.00%    
Compania de Minas Buenaventura S.A.A. [Member] | Sociedads Mineras Cerro Verde Saa [Member]        
Disclosure of identification and business activity [Line Items]        
Proportion of ownership interests held by non-controlling interests   19.58%    
other stakeholders [Member] | Sociedads Mineras Cerro Verde Saa [Member]        
Disclosure of identification and business activity [Line Items]        
Proportion of ownership interests held by non-controlling interests   5.86%    
Mining activities [Member]        
Disclosure of identification and business activity [Line Items]        
Losses on disposals of non-current assets   $ 4,050,000    
Reversal of impairment loss   $ 11,770,000    
El Brocal [Member] | Mining activities [Member]        
Disclosure of identification and business activity [Line Items]        
Proportion of voting rights held in subsidiary   61.42% 61.32%  
El Brocal [Member] | Mining activities [Member] | Indirect [Member]        
Disclosure of identification and business activity [Line Items]        
Proportion of voting rights held in subsidiary   58.24% 58.24%  
Colquijirca S.A. [Member] | Mining activities [Member]        
Disclosure of identification and business activity [Line Items]        
Proportion of voting rights held in subsidiary   99.99% 99.99%  
Antapite [Member] | Mining activities [Member]        
Disclosure of identification and business activity [Line Items]        
Proceeds from sales of property, plant and equipment, classified as investing activities     $ 1,003,000  
Losses on disposals of non-current assets     $ 3,014,000  
Compania Minera Condesa S.A. [Member] | Minera Yanacocha SRL and subsidiary [Member]        
Disclosure of identification and business activity [Line Items]        
Proportion of ownership interests held by non-controlling interests   45.95%    
Compania Minera Condesa S.A. [Member] | Mining activities [Member] | Indirect [Member]        
Disclosure of identification and business activity [Line Items]        
Proportion of ownership interest in subsidiary   0.00% 0.00%  
Minas Buenaventura S.A.A [Member] | Minera Yanacocha SRL and subsidiary [Member]        
Disclosure of identification and business activity [Line Items]        
Proportion of ownership interest in subsidiary   100.00%    
Breapampa [Member] | Mining activities [Member]        
Disclosure of identification and business activity [Line Items]        
Proceeds from sales of property, plant and equipment, classified as investing activities   $ 2,000,000    
Reversal of impairment loss   7,400,000    
Recuperada [Member] | Mining activities [Member]        
Disclosure of identification and business activity [Line Items]        
Proceeds from sales of property, plant and equipment, classified as investing activities   600,000    
Reversal of impairment loss   $ 7,100,000