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Stockpiles and ore on leach pads, net (Tables) - Minera Yanacocha SRL and subsidiary [Member]
 12 Months Ended
Dec. 31, 2020
Disclosure of stockpiles and ore on leach pads [Line Items]  
Schedule of stockpiles and ore on leach pads, net

(a)This caption is made up as follows:

 

 

 

 

 

 

 

    

2020

    

2019

 

 

US$(000)

 

US$(000)

 

 

 

 

 

Current portion -

 

  

 

  

Stockpiles

 

7,363

 

23,769

Ore on leach pads

 

124,364

 

139,991

Net realizable value adjustment (b)

 

(10,212)

 

(28,837)

 

 

 

 

 

 

 

121,515

 

134,923

 

 

 

 

 

Non-current portion -

 

  

 

  

Stockpiles

 

33,088

 

35,888

Ore on leach pads

 

39,674

 

88,223

Net realizable value adjustment (b)

 

(3,075)

 

(19,088)

 

 

 

 

 

 

 

69,687

 

105,023

 

Schedule of provision for net realizable value

(b)The provision for net realizable value adjustment had the following movement during the years 2020, 2019 and 2018:

 

 

 

 

 

 

 

 

 

    

2020

    

2019

    

2018

 

 

US$(000)

 

US$(000)

 

US$(000)

 

 

 

 

 

 

 

Opening balance, note 18

 

47,925

 

89,127

 

62,540

Provision

 

37,880

 

33,464

 

90,365

Reversal of provision

 

(72,518)

 

(74,666)

 

(63,778)

 

 

 

 

 

 

 

Ending balance, note 18

 

13,287

 

47,925

 

89,127