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Provisions (Details Textual) - USD ($) |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Dec. 07, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Jun. 27, 2016 | Dec. 31, 2014
Disclosure of provisions [Line Items] |  |  |  |  |  |  |  |
Provision for closure of mining units and exploration projects at future value |  | $ 230,900,000 |  |  |  |  |  |
Provision for closure of mining units and exploration projects at present value |  | 200.2 |  |  |  |  |  |
Provision for closure of mining units and exploration projects |  | 200,183,000 |  | $ 206,462,000 |  | $ 166,403,000 |  |
Letter of credit |  | 109,600,000 |  | 117,700,000 |  |  |  |
Reclamation Expense |  | $ 109 |  | 78,000,000 |  |  |  |
Employee's profit share on annual taxable income |  | 8.00% |  |  |  |  |  |
Other provisions |  | $ 3,695,000 |  | 1,703,000 |  |  |  |
Notional amount |  | 275,000,000 |  | 275,000,000 |  |  | $ 275,000,000 |
Non-current provisions |  | $ 164,877,000 |  | 174,190,000 |  |  |  |
Future value of non current provisions |  |  |  | $ 368,800,000 |  |  |  |
Annual risk free rate |  | 2.73% |  | 2.97% |  |  |  |
Provision for obligations with communities |  | $ 19,376,000 |  | $ 4,710,000 |  |  |  |
Increase (decrease) through transfers and other changes, other provisions |  | 3,700,000 |  |  |  |  |  |
Disputed mining royalties, noncurrent |  | 127,500,000 |  |  |  |  |  |
Net asset tax included in provisions |  | 19,600,000 |  |  |  |  |  |
Penalties of royalties |  | 1,400,000 |  |  |  |  |  |
Income and non-income tax contingencies included in other long-term liabilities |  | 11,400,000 |  |  |  |  |  |
Ministry of Energy and Mines [Member] |  |  |  |  |  |  |  |
Disclosure of provisions [Line Items] |  |  |  |  |  |  |  |
Notional amount |  | 35,500,000 |  |  |  |  |  |
Provision for remediation and mine closure [Member] |  |  |  |  |  |  |  |
Disclosure of provisions [Line Items] |  |  |  |  |  |  |  |
Non-current provisions |  | 156,900,000 |  | 153,300,000 |  |  |  |
Future value of non current provisions |  | 374,400,000 |  |  |  |  |  |
Increase (decrease) through transfers and other changes, other provisions |  | (3,710,000) |  | (16,091,000) |  |  |  |
La Joya [Member] | Irrigation Project [Member] | Provision for social commitments [Member] |  |  |  |  |  |  |  |
Disclosure of provisions [Line Items] |  |  |  |  |  |  |  |
Other provisions |  | 5,500,000 |  |  |  |  |  |
Alata-Congata Road [Member] | Repaving Project [Member] | Provision for social commitments [Member] |  |  |  |  |  |  |  |
Disclosure of provisions [Line Items] |  |  |  |  |  |  |  |
Other provisions |  | $ 5,500,000 |  |  |  |  |  |
Number of days of work [Member] |  |  |  |  |  |  |  |
Disclosure of provisions [Line Items] |  |  |  |  |  |  |  |
Percentage of distribution |  | 50.00% |  |  |  |  |  |
Annual salary levels [Member] |  |  |  |  |  |  |  |
Disclosure of provisions [Line Items] |  |  |  |  |  |  |  |
Percentage of distribution |  | 50.00% |  |  |  |  |  |
Gross carrying amount [member] |  |  |  |  |  |  |  |
Disclosure of provisions [Line Items] |  |  |  |  |  |  |  |
Additions other than through business combinations, property, plant and equipment |  | $ 277,824,000 |  | 408,898,000 |  |  |  |
Gross carrying amount [member] | Asset retirement and mine closure cost asset [member] |  |  |  |  |  |  |  |
Disclosure of provisions [Line Items] |  |  |  |  |  |  |  |
Additions other than through business combinations, property, plant and equipment |  |  |  | 352,000,000 |  |  |  |
Minera Yanacocha SRL and subsidiary [Member] |  |  |  |  |  |  |  |
Disclosure of provisions [Line Items] |  |  |  |  |  |  |  |
Provision for closure of mining units and exploration projects |  | 1,234,731,000 | [1] | 1,012,888,000 | [1] | 578,959,000 |  | $ 557,457,000
Additional provisions made to reclamation obligations | $ 430,000,000 | 221,450,000 |  | 430,292,000 |  | 10,434,000 |  |
Reclamation Expense |  | 124,124,000 |  | 78,494,000 |  | $ 0 |  |
Other provisions |  | 3,243,000 |  | 23,809,000 |  |  |  |
Non-current provisions |  | 1,236,965,000 |  | 1,025,025,000 |  |  |  |
Minera Yanacocha SRL and subsidiary [Member] | Gross carrying amount [member] |  |  |  |  |  |  |  |
Disclosure of provisions [Line Items] |  |  |  |  |  |  |  |
Additions other than through business combinations, property, plant and equipment |  | 148,950,000 |  | 456,908,000 |  |  |  |
Minera Yanacocha SRL and subsidiary [Member] | Gross carrying amount [member] | Asset retirement and mine closure cost asset [member] |  |  |  |  |  |  |  |
Disclosure of provisions [Line Items] |  |  |  |  |  |  |  |
Additions other than through business combinations, property, plant and equipment |  | $ 97,326,000 |  | $ 351,798,000 |  |  |  |
Bottom of range [member] |  |  |  |  |  |  |  |
Disclosure of provisions [Line Items] |  |  |  |  |  |  |  |
Actuarial assumption of discount rates |  | 0.30% |  | 1.40% |  |  |  |
Top of range [member] |  |  |  |  |  |  |  |
Disclosure of provisions [Line Items] |  |  |  |  |  |  |  |
Discount rate used to reflect time value of money for provisions |  | 3.55% |  |  |  |  |  |
Notional amount |  |  |  |  |  |  |  | $ 800
Actuarial assumption of discount rates |  | 2.90% |  | 4.20% |  |  |  |
[1] | Provision for closure of mining units and explorations projects - The Company's mining and exploration activities are subject to various laws and regulations governing the protection of the environment. These laws and regulations are continually changing and are generally becoming more restrictive. The Company conducts its operations so as to protect the public health and environment and believes its operations are in compliance with all applicable laws and regulations in all material respects. The Company has made, and expects to make in the future, expenditures to comply with such laws and regulations, but cannot predict the amount of such future expenditures. Estimated future reclamation costs are based principally on legal and regulatory requirements.

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