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Consolidated statements of changes in equity - USD ($) $ in Thousands | Total | Minera Yanacocha SRL and subsidiary [Member] | Sociedads Mineras Cerro Verde Saa [Member] | Capital stock, net of treasury shares [member] | Capital stock, net of treasury shares [member] Minera Yanacocha SRL and subsidiary [Member] | Capital stock, net of treasury shares [member] Sociedads Mineras Cerro Verde Saa [Member] | Other reserves of equity [member] | Retained earnings [member] | Retained earnings [member] Minera Yanacocha SRL and subsidiary [Member] | Retained earnings [member] Sociedads Mineras Cerro Verde Saa [Member] | Equity attributable to owners of parent [member] | Non-controlling interests [member] | Additional paid-in capital [member] | Additional paid-in capital [member] Minera Yanacocha SRL and subsidiary [Member] | Legal reserve [member] | Miscellaneous other reserves [member] | Miscellaneous other reserves [member] Minera Yanacocha SRL and subsidiary [Member] | Miscellaneous other reserves [member] Sociedads Mineras Cerro Verde Saa [Member] | Investement Share [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2014 | $ 3,762,125 | $ 2,679,777 | $ 4,465,090 | $ 750,497 | $ 398,216 | $ 990,659 | $ 1,755 | $ 2,328,423 | $ 2,279,490 | $ 3,276,299 | $ 3,464,105 | $ 298,020 | $ 219,055 | $ 226 | $ 162,710 | $ 269 | $ 1,845 | $ 198,132 | $ 1,396
Balance (in shares) at Dec. 31, 2014 |  |  |  | 253,715,190 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net profit (loss) | (375,545) | (450,195) | 33,284 | $ 0 | 0 |  | 0 | (317,210) | (450,195) | 33,284 | (317,210) | (58,335) | 0 | 0 | 0 | 0 | 0 |  | 0
Other comprehensive profit (loss) | (542) | (757) |  | 0 | 0 |  | 485 | 0 | 0 |  | 485 | (1,027) | 0 | 0 | 0 | 0 | (757) |  | 0
Total other comprehensive profit (loss) | (376,087) | (450,952) |  | 0 | 0 |  | 485 | (317,210) | (450,195) |  | (316,725) | (59,362) | 0 | 0 | 0 | 0 | (757) |  | 0
Dividends declared and paid | (10,488) |  |  | 0 |  |  | 0 | 0 |  |  | 0 | (10,488) | 0 |  | 0 | 0 |  |  | 0
Expired dividends | 4 |  |  | 0 |  |  | 0 | 0 |  |  | 4 | 0 | 0 |  | 4 | 0 |  |  | 0
Other items | 13,682 |  |  | 0 |  |  | 0 | 13,682 |  |  | 13,682 | 0 | 0 |  | 0 | 0 |  |  | 0
Balance at Dec. 31, 2015 | 3,389,236 | 2,228,825 | 4,498,374 | $ 750,497 | 398,216 | 990,659 | 2,240 | 2,024,895 | 1,829,295 | 3,309,583 | 3,161,066 | 228,170 | 219,055 | 226 | 162,714 | 269 | 1,088 | 198,132 | 1,396
Balance (in shares) at Dec. 31, 2015 |  |  |  | 253,715,190 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net profit (loss) | (327,814) | (1,043,752) | 340,907 | $ 0 | 0 | 0 | 0 | (323,492) | (1,043,752) | 340,907 | (323,492) | (4,322) | 0 | 0 | 0 | 0 | 0 | 0 | 0
Other comprehensive profit (loss) | (5,390) | 651 |  | 0 | 0 |  | (4,023) | 0 | 0 |  | (4,023) | (1,367) | 0 | 0 | 0 | 0 | 651 |  | 0
Total other comprehensive profit (loss) | (333,204) | (1,043,101) |  | 0 | 0 |  | (4,023) | (323,492) | (1,043,752) |  | (327,515) | (5,689) | 0 | 0 | 0 | 0 | 651 |  | 0
Treasury shares | (1,210) |  |  | 0 |  |  | 0 | 0 |  |  | (1,210) | 0 | (605) |  | 0 | 0 |  |  | (605)
Dividends declared and paid | (15,021) | (300,000) |  | 0 | 0 |  | 0 | (7,621) | (300,000) |  | (7,621) | (7,400) | 0 | 0 | 0 | 0 | 0 |  | 0
Expired dividends | 30 |  |  | 0 |  |  | 0 | 0 |  |  | 30 | 0 | 0 |  | 30 | 0 |  |  | 0
Change in non-controlling interest, note 19(a) | 7,382 |  |  | 0 |  |  | 0 | (3,659) |  |  | (3,659) | 11,041 | 0 |  | 0 | 0 |  |  | 0
Balance at Dec. 31, 2016 | 3,047,213 | 885,724 | 4,839,281 | $ 750,497 | 398,216 | 990,659 | (1,783) | 1,690,123 | 485,543 | 3,650,490 | 2,821,091 | 226,122 | 218,450 | 226 | 162,744 | 269 | 1,739 | 198,132 | 791
Balance (in shares) at Dec. 31, 2016 |  |  |  | 253,715,190 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net profit (loss) | 64,435 | (175,454) | 349,881 | $ 0 | 0 | 0 | 0 | 60,823 | (175,454) | 349,881 | 60,823 | 3,612 | 0 | 0 | 0 | 0 | 0 | 0 | 0
Other comprehensive profit (loss) | (19,286) | (3,244) |  | 0 | 0 |  | (12,105) | 0 |  |  | (12,105) | (7,181) | 0 | 0 | 0 | 0 | (3,244) |  | 0
Total other comprehensive profit (loss) | 45,149 | (178,698) |  | 0 | 0 |  | (12,105) | 60,823 | (175,454) |  | 48,718 | (3,569) | 0 | 0 | 0 | 0 | (3,244) |  | 0
Dividends declared and paid | (28,135) |  |  | 0 |  |  | 0 | (22,099) |  |  | (22,099) | (6,036) | 0 |  | 0 | 0 |  |  | 0
Expired dividends | 327 |  |  | 0 |  |  | 0 | 0 |  |  | 327 | 0 | 0 |  | 327 | 0 |  |  | 0
Change in non-controlling interest, note 19(a) | (927) |  |  | 0 |  |  | 0 | 0 |  |  | 0 | (927) | 0 |  | 0 | 0 |  |  | 0
Treasury shares, note 1 |  | (47,911) |  |  | 0 |  |  |  | 0 |  |  |  |  | (47,911) |  |  | 0 |  |
Balance at Dec. 31, 2017 | $ 3,063,627 | $ 659,115 | $ 5,189,162 | $ 750,497 | $ 398,216 | $ 990,659 | $ (13,888) | $ 1,728,847 | $ 310,089 | $ 4,000,371 | $ 2,848,037 | $ 215,590 | $ 218,450 | $ (47,685) | $ 163,071 | $ 269 | $ (1,505) | $ 198,132 | $ 791
Balance (in shares) at Dec. 31, 2017 |  |  |  | 253,715,190 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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