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Property, plant and equipment, net (Details 1) - Gold [Member] - Minera Yanacocha SRL and subsidiary [Member]	12 Months Ended
	Dec. 31, 2017 USD ($)
Current period [Member]
Property, plant and equipments,net [Line Items]
Commodity price used to estimate future revenues	$ 1,221
Long term period [Member]
Property, plant and equipments,net [Line Items]
Commodity price used to estimate future revenues	$ 1,300

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- Definition

The estimated commodity prices used to determine future revenues.

+ References

No definition available.

+ Details

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- References

No definition available.

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- Details

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- Details

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