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Tax situation (Details Textual) |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jan. 02, 2014 | Oct. 31, 2018 USD ($) | Oct. 31, 2018 PEN (S/) | Jan. 02, 2017 | Dec. 31, 2014 | Jul. 17, 2012 | Sep. 28, 2011 | Jun. 30, 2019 USD ($) | Jun. 30, 2019 PEN (S/) | Dec. 31, 2011 USD ($) | Dec. 31, 2011 PEN (S/) | Dec. 31, 2018 USD ($) | Dec. 31, 2018 PEN (S/) | Dec. 31, 2017 USD ($) | Dec. 31, 2017 PEN (S/) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 USD ($) | Dec. 31, 2013 PEN (S/) | Dec. 31, 2012 USD ($) | Dec. 31, 2012 PEN (S/) | Dec. 31, 2008 USD ($) | Dec. 31, 2007 USD ($) | Dec. 31, 2006 USD ($) | Dec. 31, 2018 PEN (S/) | Dec. 31, 2017 PEN (S/) | Jun. 27, 2016 USD ($)
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable tax rate |  |  |  |  |  |  |  |  |  |  |  | 32.00% | 32.00% | 32.00% | 32.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Income Tax Rate Applicable To Dividends |  |  |  |  |  |  |  |  |  |  |  | 5.00% | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable Tax Rate With Respect To Results Obtained |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.80% | 4.10% |  |  |  |  |  |  |  |  |  |
Unused tax losses for which no deferred tax asset recognised |  |  |  |  |  |  |  |  |  |  |  | $ 458,762,000 |  | $ 398,378,000 |  |  |  |  |  |  |  |  |  |  |  | S/ 1,550,156,000 | S/ 1,346,118,000 |
Mining royalties |  |  |  |  |  |  |  |  |  |  |  | 21,526,000 |  | 31,217,000 |  | $ 27,611,000 |  |  |  |  |  |  | $ 13,200,000 | $ 13,200,000 | $ 13,200,000 |  |  |
Valuation allowance on deferred income tax asset |  |  |  |  |  |  |  |  |  |  |  | 24,000,000 |  | 51,000,000 |  | 386,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Term of agreement of guarantees and measures to promote investments |  |  |  |  |  | 15 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Penalties and interest paid to government |  | $ 165,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax payment, Estimate of Possible Loss |  | $ 274,900,000 | S/ 928,900,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax payment based on exchange rates |  |  |  |  |  |  |  |  |  |  |  | 176,600,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tax payment based on estimated due |  |  |  |  |  |  |  |  |  |  |  | 187,700,000 | S/ 596,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Penalties and interest for default tax |  |  |  |  |  |  |  |  |  | $ 8,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  |  |  |  |  |  | 275,000,000 |  | 275,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 275,000,000
Current tax expense (income) |  |  |  |  |  |  |  |  |  |  |  | 16,928,000 |  | 23,837,000 |  | 39,444,000 |  |  |  |  |  |  |  |  |  |  |  |
Current tax expense income relating to special mining tax |  |  |  |  |  |  |  |  |  |  |  | (28,200,000) |  | 102,600,000 |  | 14,900,000 |  |  |  |  |  |  |  |  |  |  |  |
Current tax expense income relating to mining royalties |  |  |  |  |  |  |  |  |  |  |  | 34,900,000 |  | 110,700,000 |  | 22,900,000 |  |  |  |  |  |  |  |  |  |  |  |
Current tax expense income relating to statutory retirement fund |  |  |  |  |  |  |  |  |  |  |  | 1,500,000 |  | 10,900,000 |  | 2,200,000 |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax expense (income) |  |  |  |  |  |  |  |  |  |  |  | 9,998,000 |  | (5,825,000) |  | 14,060,000 |  |  |  |  |  |  |  |  |  |  |  |
Tax expense (income), continuing operations |  |  |  |  |  |  |  |  |  |  |  | $ (26,926,000) |  | $ (18,012,000) |  | $ (53,504,000) |  |  |  |  |  |  |  |  |  |  |  |
Amount of the assessment, including interest and penalties |  |  |  |  |  |  |  |  |  | $ 15,900,000 | S/ 53,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bottom of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty rate on revenue | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Top of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty rate on revenue | 12.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Peruvian government [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable tax rate |  |  |  |  |  |  |  |  |  |  |  | 32.00% | 32.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minera Yanacocha SRL and subsidiary [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable tax rate |  |  |  | 29.50% |  |  |  |  |  |  |  | 29.50% | 29.50% | 29.50% | 29.50% | 28.00% |  |  |  |  |  |  |  |  |  |  |  |
Maximum mining tax rate on operating profit |  |  |  |  |  |  | 12.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mining royalties |  |  |  |  |  |  |  |  |  |  |  | $ 1,273,000 |  | $ 3,140,000 |  | $ 3,742,000 |  |  |  |  |  |  |  |  |  |  |  |
Employers contribution rate |  |  |  |  |  |  |  |  |  |  |  | 0.50% | 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Employees Contribution Rate |  |  |  |  |  |  |  |  |  |  |  | 0.50% | 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income and mining tax expense |  |  |  |  |  |  |  |  |  |  |  | $ 39,000 |  | 29,000 |  | 141,000 |  |  |  |  |  |  |  |  |  |  |  |
Term of agreement of guarantees and measures to promote investments |  |  |  |  |  |  |  |  |  |  |  | 15 years | 15 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current tax expense (income) |  |  |  |  |  |  |  |  |  |  |  | $ 30,368,000 |  | 7,026,000 |  | 43,127,000 |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax expense (income) |  |  |  |  |  |  |  |  |  |  |  | (1,071,000) |  | 0 |  | 0 |  |  |  |  |  |  |  |  |  |  |  |
Tax expense (income), continuing operations |  |  |  |  |  |  |  |  |  |  |  | 29,297,000 |  | 7,026,000 |  | 43,127,000 |  |  |  |  |  |  |  |  |  |  |  |
Minera Yanacocha SRL and subsidiary [Member] | Special Mining Burden GEM [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional income and mining tax expense |  |  |  |  |  |  |  |  |  |  |  | 8,230,000 |  | 3,526,000 |  | 6,945,000 |  |  |  |  |  |  |  |  |  |  |  |
Minera Yanacocha SRL and subsidiary [Member] | Special mining tax rate IEM [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mining tax expense |  |  |  |  |  |  |  |  |  |  |  | $ 592,000 |  | $ 1,418,000 |  | $ 3,259,000 |  |  |  |  |  |  |  |  |  |  |  |
Minera Yanacocha SRL and subsidiary [Member] | Special mining tax rate IEM [Member] | Bottom of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mining tax rate on operating profit |  |  |  |  |  |  |  |  |  |  |  | 2.00% | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minera Yanacocha SRL and subsidiary [Member] | Special mining tax rate IEM [Member] | Top of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mining tax rate on operating profit |  |  |  |  |  |  |  |  |  |  |  | 8.40% | 8.40% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minera Yanacocha SRL and subsidiary [Member] | Special mining burden rateGEM [Member] | Bottom of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mining tax rate on operating profit |  |  |  |  |  |  |  |  |  |  |  | 4.00% | 4.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minera Yanacocha SRL and subsidiary [Member] | Special mining burden rateGEM [Member] | Top of range [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mining tax rate on operating profit |  |  |  |  |  |  |  |  |  |  |  | 13.12% | 13.12% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minera Yanacocha SRL and subsidiary [Member] | Peruvian government [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalty rate on revenue | 1.00% |  |  |  |  |  | 1.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minera Yanacocha SRL and subsidiary [Member] | Fiscal year 2015 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Progressive income tax rate |  |  |  |  | 28.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minera Yanacocha SRL and subsidiary [Member] | Fiscal year 2017 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Progressive income tax rate |  |  |  |  | 27.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Minera Yanacocha SRL and subsidiary [Member] | Fiscal year 2019 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Progressive income tax rate |  |  |  |  | 26.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable tax rate |  |  |  |  |  |  |  |  |  |  |  | 32.00% | 32.00% | 32.00% | 32.00% | 32.00% |  |  |  |  |  |  |  |  |  |  |  |
Mining royalties payable |  |  |  |  |  |  |  |  |  |  |  | $ 332,300,000 |  | $ 82,100,000 |  |  |  |  |  |  |  |  |  |  |  | 1,122,900,000 | 266,300,000 |
Current tax expense (income) |  |  |  |  |  |  |  |  |  |  |  | (325,170,000) |  | 430,974,000 |  | $ 141,153,000 |  |  |  |  |  |  |  |  |  |  |  |
Deferred tax expense (income) |  |  |  |  |  |  |  |  |  |  |  | 0 |  | (167,541,000) |  | 81,441,000 |  |  |  |  |  |  |  |  |  |  |  |
Tax expense (income), continuing operations |  |  |  |  |  |  |  |  |  |  |  | 325,170,000 |  | (486,043,000) |  | $ (263,082,000) |  |  |  |  |  |  |  |  |  |  |  |
Amount of the assessment, including interest and penalties |  |  |  |  |  |  |  | $ 280,300,000 | S/ 947,200,000 |  |  | 69,300,000 | S/ 234,000,000 | 76,100,000 | S/ 254,700,000 |  |  |  | $ 89,900,000 | S/ 303,800,000 | $ 71,300,000 | S/ 240,900,000 |  |  |  |  |  |
Sociedad Minera Cerro Verde S.A.A. [Member] | Letters of Credit [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  |  |  |  |  |  | $ 336,600,000 |  | $ 86,500,000 |  |  |  |  |  |  |  |  |  |  |  | S/ 1,137,400,000 | S/ 280,800,000 |
Changes in tax rates or tax laws enacted or announced [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Income Tax Explanatory [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Applicable Tax Rate With Respect To Results Obtained |  |  |  |  |  |  |  |  |  |  |  |  |  | 5.00% | 5.00% |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The amount of additional income and mining tax expense arised from the operations at Cerro Yanacocha and La Quinua + References No definition available. + Details
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- Definition The amount of assessment including interest and penalties on default tax. + References No definition available. + Details
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- Definition The applicable tax rate with respect to results obtained. + References No definition available. + Details
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- Definition The amount of current tax expense (income) relating to mining royalties. + References No definition available. + Details
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- Definition The amount of current tax expense (income) relating to special mining tax. + References No definition available. + Details
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- Definition The amount of current tax expense (income) relating to statutory retirement fund. + References No definition available. + Details
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- Definition The rate of employees contribution to supplementary fund relates to metallurgical and steel workers applied on the monthly gross salary. + References No definition available. + Details
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- Definition The rate of employers contribution to supplementary fund relates to metallurgical and steel workers applied on the annual income before taxes. + References No definition available. + Details
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- Definition The amount of income and mining tax expense. + References No definition available. + Details
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- Definition The income tax rate applicable to dividends. + References No definition available. + Details
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- Definition The maximum percentage of mining tax rate to be calculated based on level of operating profit. + References No definition available. + Details
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- Definition Royalty expense incurred and are directly related to goods produced and sold and services rendered during the reporting period. + References No definition available. + Details
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- Definition The amount of mining royalty payable. + References No definition available. + Details
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- Definition The amount of mining tax expense. + References No definition available. + Details
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- Definition The percentage of mining tax rate applied on operating profit to be payable on a quarterly basis. + References No definition available. + Details
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- Definition The amount of interest and penalties on default tax. + References No definition available. + Details
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