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Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Profit (loss)for the year | $ 64,435 | $ (327,814) | $ (375,545) |
Equity | 3,063,627 | 3,047,213 | 3,389,236 | $ 3,762,125
Previous GAAP [member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Profit (loss)for the year | (118,127) | (1,191,319) | (252,159) |
Equity | 1,759,039 | 1,928,321 |  |
Previous GAAP [member] | Asset retirement obligation [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Profit (loss)for the year | (35,911) | (6,210) | (6,041) |
Equity | 116,458 | 152,369 |  |
Effect of transition to IFRSs [member] | Stripping activity asset [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Profit (loss)for the year | (6,360) | 22,156 | 18,868 |
Equity | 34,709 | 41,069 |  |
Effect of transition to IFRSs [member] | Inventorie [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Profit (loss)for the year | 17,169 | (36,076) | (20,903) |
Equity | (13,120) | (30,289) |  |
Effect of transition to IFRSs [member] | Deferred workers' profit participation [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Profit (loss)for the year | 0 | 0 | (2,790) |
Effect of transition to IFRSs [member] | Deferred income tax of reconciliation items [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Profit (loss)for the year | 0 | 0 | (43,441) |
Effect of transition to IFRSs [member] | Others [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Profit (loss)for the year | (1,100) | (137) | (2,008) |
Equity | (3,333) | (4,639) |  |
Sociedad Minera Cerro Verde S.A.A. [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Profit (loss)for the year | 349,881,000 | 340,907,000 | 33,284,000 |
Sociedad Minera Cerro Verde S.A.A. [Member] | Stripping activity asset [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Equity | (140,435) | (63,074) | (99,326) |
Sociedad Minera Cerro Verde S.A.A. [Member] | Inventorie [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Equity | (78,744) | (49,940) | (30,698) |
Sociedad Minera Cerro Verde S.A.A. [Member] | Asset retirement obligation [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Equity | 422 | (440) | (1,862) |
Sociedad Minera Cerro Verde S.A.A. [Member] | Deferred workers' profit participation [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Equity | 5,216 | (27,133) | (8,126) |
Sociedad Minera Cerro Verde S.A.A. [Member] | Deferred income tax of reconciliation items [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Equity | 68,257 | 43,728 | 38,715 |
Sociedad Minera Cerro Verde S.A.A. [Member] | Others [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Equity | (308) | (283) | (399) |
Sociedad Minera Cerro Verde S.A.A. [Member] | Previous GAAP [member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Profit (loss)for the year | 301,431 | 345,461 | 4,097 |
Equity | 5,043,570 | 4,742,139 | 4,396,678 |
Sociedad Minera Cerro Verde S.A.A. [Member] | Effect of transition to IFRSs [member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Profit (loss)for the year | 349,881 | 340,907 | 33,284 |
Equity | 5,189,162 | 4,839,281 | 4,498,374 |
Sociedad Minera Cerro Verde S.A.A. [Member] | Effect of transition to IFRSs [member] | Stripping activity asset [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Profit (loss)for the year | (77,361) | 36,252 | (45,168) |
Sociedad Minera Cerro Verde S.A.A. [Member] | Effect of transition to IFRSs [member] | Inventorie [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Profit (loss)for the year | (28,804) | (19,242) | 12,573 |
Sociedad Minera Cerro Verde S.A.A. [Member] | Effect of transition to IFRSs [member] | Asset retirement obligation [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Profit (loss)for the year | 862 | 1,422 | 379 |
Sociedad Minera Cerro Verde S.A.A. [Member] | Effect of transition to IFRSs [member] | Deferred workers' profit participation [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Profit (loss)for the year | 32,349 | (19,007) | (6,225) |
Sociedad Minera Cerro Verde S.A.A. [Member] | Effect of transition to IFRSs [member] | Deferred income tax of reconciliation items [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Profit (loss)for the year | 24,529 | 5,013 | 9,470 |
Sociedad Minera Cerro Verde S.A.A. [Member] | Effect of transition to IFRSs [member] | Others [Member] |  |  |  |
Disclosure of Reconciliation between net income and shareholders' equity determined under IFRS and U.S. GAAP [Line Items] |  |  |  |
Profit (loss)for the year | $ (25) | $ 116 | $ (216) |

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