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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]
Other reserves of equity [member]
Minera Yanacocha SRL and subsidiary [Member]
Other reserves of equity [member]
Sociedads Mineras Cerro Verde Saa [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]
Sociedads Mineras Cerro Verde Saa [Member]
Investement shares [Member]
Balance at Dec. 31, 2015 $ 3,389,236 $ 2,228,825 $ 4,498,374 $ 750,497 $ 398,216 $ 990,659 $ 2,240 $ 1,088   $ 2,024,895 $ 1,829,295 $ 3,309,583 $ 3,161,066 $ 228,170 $ 219,055 $ 226 $ 162,714 $ 269 $ 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 0   (323,492) (1,043,752) 340,907 (323,492) (4,322) 0 0 0 0 0 0
Other comprehensive profit (loss) (5,390) 651   0 0   (4,023) 651   0 0   (4,023) (1,367) 0 0 0 0   0
Total other comprehensive income (loss) (333,204) (1,043,101)   0 0   (4,023) 651   (323,492) (1,043,752)   (327,515) (5,689) 0 0 0 0   0
Treasury shares (1,210)     0     0     0     (1,210) 0 (605)   0 0   (605)
Dividends declared and paid, note 17(d) (15,021) (300,000)   0 0   0 0   (7,621) (300,000)   (7,621) (7,400) 0 0 0 0   0
Expired dividends, note 17(c) 30     0     0     0     30 0 0   30 0   0
Change in non-controlling interest, note 18(a) 7,382     0     0     (3,659)     (3,659) 11,041 0   0 0   0
Balance at Dec. 31, 2016 3,047,213   4,839,281 $ 750,497   990,659 (1,783)     1,690,123   3,650,490 2,821,091 226,122 218,450   162,744 269 198,132 791
Balance (in shares) at Dec. 31, 2016       253,715,190                                
Net profit (loss) 64,435 (175,454) 349,881 $ 0 0 0 0 0   60,823 (175,454) 349,881 60,823 3,612 0 0 0 0 0 0
Other comprehensive profit (loss) (19,286) (3,244)   0 0   (12,105) (3,244)   0 0   (12,105) (7,181) 0 0 0 0   0
Total other comprehensive income (loss) 45,149 (178,698)   0 0   (12,105) (3,244)   60,823 (175,454)   48,718 (3,569) 0 0 0 0   0
Treasury shares   (47,911)     0     0     0         (47,911)        
Dividends declared and paid, note 17(d) (28,135)     0     0     (22,099)     (22,099) (6,036) 0   0 0   0
Expired dividends, note 17(c) 327     0     0     0     327 0 0   327 0   0
Change in non-controlling interest, note 18(a) (927)     0     0     0     0 (927) 0   0 0   0
Balance at Dec. 31, 2017 3,063,627 659,115 5,189,162 $ 750,497 398,216 990,659 (13,888) (1,505)   1,728,847 310,089 4,000,371 2,848,037 215,590 218,450 (47,685) 163,071 269 198,132 791
Balance (in shares) at Dec. 31, 2017       253,715,190                                
Net profit (loss) (11,654) (81,517) 119,710 $ 0 0 0 0 0   (13,445) (81,517) 119,710 (13,445) 1,791 0 0 0 0 0 0
Other comprehensive profit (loss) 22,601 (91)   0 0   13,185 (91)   0 0   13,185 9,416 0 0 0 0   0
Total other comprehensive income (loss) 10,947 (81,608)   0 0   13,185 (91)   (13,445) (81,517)   (260) 11,207 0 0 0 0   0
Proceeds from sale of shares, note 13   47,911     19,471     0     0         28,440        
Treasury shares   0     (19,711)     0     0         19,711        
Dividends declared and paid, note 17(d) (28,420)   (200,000) 0   0 0   $ 0 (22,860)   (200,000) (22,860) (5,560) 0   0 0   0
Change in investments, note 10(b) (16,633)     0     0     (16,633)     (16,633) 0 0   0 0   0
Expired dividends, note 17(c) 44     0     0     0     44 0 0   44 0   0
Reclassification to debt instruments, note 13   (41,695)     (19,471)     0     0         (22,224)        
Balance at Dec. 31, 2018 $ 3,029,565 $ 583,723 $ 5,108,872 $ 750,497 $ 378,505 $ 990,659 $ (703) $ (1,596)   $ 1,675,909 $ 228,572 $ 3,920,081 $ 2,808,328 $ 221,237 $ 218,450 $ (21,758) $ 163,115 $ 269 $ 198,132 $ 791
Balance (in shares) at Dec. 31, 2018       253,715,190