Disclosure of information on segments (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure of information on segments [Abstract]

Disclosure of entitys reportable segments [Table Text Block]

																																											Equity accounted investees
	Uchucchacua (Operation)			Orcopampa (Operation)			Julcani (Operation)			Mallay (Operation)			Tambomayo (Operation)			Colquijirca (Operation)			La Zanja (Operation)			Exploration and development mining projects			Energy generation and transmission			Insurance brokerage			Rental of mining concessions			Holding of investment in shares			Industrial activities			Corporate			Minera Yanacocha S.R.L.			Sociedad Minera Cerro Verde S.A.A			Compañía Minera Coimolache S.A.			Total operating segments			Adjustments and eliminations			Total
	US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)
Year 2018
Results:
Continuing operations
Operating income:
Net sale of goods		257,282			153,003			34,104			16,666			225,281			333,560			96,611			-			-			-			-			-			6,655			-			635,393			3,054,026			225,447			5,038,028			(3,915,033	)		1,122,995
Net sale of services		-			-			-			-			-			-			-			-			62,962			14,986			-			615			19,908			-			21,965			-			-			120,436			(96,435	)		24,001
Royalty income		-			-			-			-			-			-			-			-			-			-			20,385			-			-			-			-			-			-			20,385			-			20,385
Total operating income		257,282			153,003			34,104			16,666			225,281			333,560			96,611			-			62,962			14,986			20,385			615			26,563			-			657,358			3,054,026			225,447			5,178,849			(4,011,468	)		1,167,381

Operating costs
Cost of sales of goods, excluding depreciation and amortization		(151,817	)		(97,006	)		(26,558	)		(12,103	)		(92,829	)		(216,560	)		(68,993	)		-			-			-			-			-			(6,280	)		-			(596,164	)		(2,216,663	)		(170,866	)		(3,655,839	)		3,030,355			(625,484	)
Cost of services, excluding depreciation and amortization		-			-			-			-			-			-			-			-			(25,499	)		-			-			-			(8,966	)		-			(2,217	)		-			-			(36,682	)		32,364			(4,318	)
Exploration in operating units		(20,898	)		(29,563	)		(8,646	)		(613	)		(20,553	)		(9,996	)		(74	)		-			-			-			-			-			-			-			-			-			-			(90,343	)		-			(90,343	)
Depreciation and amortization		(26,181	)		(8,802	)		(3,353	)		(2,407	)		(77,029	)		(67,666	)		(34,088	)		-			(10,248	)		-			-			-			(11,483	)		-			-			-			-			(241,257	)		(29	)		(241,286	)
Mining royalties		(2,243	)		(13,669	)		(237	)		(138	)		(1,936	)		(2,345	)		(957	)		-			-			-			-			-			-			-			-			-			-			(21,525	)		(1	)		(21,526	)
Total operating costs		(201,139	)		(149,040	)		(38,794	)		(15,261	)		(192,347	)		(296,567	)		(104,112	)		-			(35,747	)		-			-			-			(26,729	)		-			(598,381	)		(2,216,663	)		(170,866	)		(4,045,646	)		3,062,689			(982,957	)
Gross profit (loss)		56,143			3,963			(4,690	)		1,405			32,934			36,993			(7,501	)		-			27,215			14,986			20,385			615			(166	)		-			58,977			837,363			54,581			1,133,203			(948,779	)		184,424

Operating expenses, net
Administrative expenses		(24,119	)		(15,100	)		(2,524	)		(1,661	)		(17,822	)		(9,906	)		(3,435	)		(3,143	)		(3,972	)		(11,900	)		(220	)		(512	)		(1,627	)		2,377			(2,783	)		-			(5,644	)		(101,991	)		23,231			(78,760	)
Exploration in non-operating areas		(18,339	)		-			-			-			-			(7,199	)		(5,002	)		(2,883	)		-			-			-			-			-			(4,091	)		-			-			-			(37,514	)		1,207			(36,307	)
Selling expenses		(8,213	)		(775	)		(356	)		(574	)		(3,046	)		(12,201	)		(784	)		-			(1,173	)		-			-			-			(924	)		-			(2,627	)		-			(1,135	)		(31,808	)		4,286			(27,522	)
Provision for contingences and others		6,784			(121	)		947			(9	)		1,263			(3,711	)		(57	)		6,130			(56	)		-			-			-			2			(111	)		-			-			-			11,061			178			11,239
Impairment recovery of long-lived assets		-			-			-			-			-			-			5,693			-			-			-			-			-			-			-			-			-			-			5,693			-			5,693
Other, net		(5,953	)		(3,386	)		(1,050	)		(3,704	)		(5,599	)		32,565			(669	)		138			562			-						2,773			194			(2,235	)		(76,155	)		-			(325	)		(62,844	)		57,832			(5,012	)
Total operating expenses, net		(49,840	)		(19,382	)		(2,983	)		(5,948	)		(25,204	)		(452	)		(4,254	)		242			(4,639	)		(11,900	)		(220	)		2,261			(2,355	)		(4,060	)		(81,565	)		-			(7,104	)		(217,403	)		86,734			(130,669	)

Operating profit (loss)		6,303			(15,419	)		(7,673	)		(4,543	)		7,730			36,541			(11,755	)		242			22,576			3,086			20,165			2,876			(2,521	)		(4,060	)		(22,588	)		837,363			47,477			915,800			(862,045	)		53,755
Other income (expense),net
Finance costs		(308	)		(395	)		(95	)		(34	)		(262	)		(10,365	)		(1,946	)		(222	)		(7,576	)		(2	)		(11	)		(25	)		(932	)		(17,194	)		(39,024	)		(426,733	)		(2,935	)		(508,059	)		469,603			(38,456	)
Net gain (loss) from currency exchange difference		196			168			8			19			209			108			(224	)		(846	)		(346	)		19			18			2			(482	)		(206	)		(2,056	)		6,161			(852	)		1,896			(3,262	)		(1,366	)
Share in the results of associates under equity method		-			-			-			-			-			-			-			-			8,589			-			-			(25,517	)		-			15,081			-			-			-			(1,847	)		703			(1,144	)
Finance income		-			-			-			-			-			418			1,649			-			179			-			21			8			127			9,293			11,448			28,089			357			51,590			(41,904	)		9,686
Total other income (expense), net		(112	)		(227	)		(87	)		(15	)		(53	)		(9,839	)		(521	)		(1,068	)		846			17			28			(25,532	)		(1,287	)		6,974			(29,632	)		(392,483	)		(3,430	)		(456,420	)		425,140			(31,280	)

Profit (loss) before income tax		6,191			(15,646	)		(7,760	)		(4,558	)		7,677			26,702			(12,275	)		(826	)		23,422			3,103			20,193			(22,656	)		(3,808	)		2,914			(52,220	)		444,880			44,047			459,380			(436,905	)		22,475
Income tax current		(768	)		(559	)		(72	)		(47	)		(656	)		(8,332	)		(24	)		-			-			-			(6,025	)		(444	)		(2	)		-			(30,368	)		(325,170	)		(23,405	)		(395,872	)		378,944			(16,928	)
Income tax deferred		-			-			-			-			-			(10,803	)		(1,220	)		-			(7,584	)		-			-			-			106			9,514			1,071			-			4,942			(3,974	)		(6,024	)		(9,998	)
Profit (loss) from continued operations		5,423			(16,205	)		(7,832	)		(4,605	)		7,021			7,567			(13,519	)		(826	)		15,838			3,103			14,168			(23,100	)		(3,704	)		12,428			(81,517	)		119,710			25,584			59,534			(63,985	)		(4,451	)

Loss from discontinued operations, see note 1(e)																																																											(7,203	)
Net loss																																																											(11,654	)

Total assets		126,374			39,725			39,537			13,793			461,335			773,554			158,718			372,344			366,354			12,154			7,154			520,484			106,391			2,407,754			2,047,472			7,554,712			361,669			15,369,524			(11,152,303	)		4,217,221
Total liabilities		45,227			30,749			29,469			6,685			28,502			340,735			68,615			18,986			197,152			4,597			2,653			603			20,671			419,208			1,463,749			2,445,840			125,307			5,248,748			(4,061,092	)		1,187,656
Other segment information
Investment in associates		-			-			-			-			-			-			-			-			-			-			-			-			-			1,473,382			-			-			-			1,473,382			-			1,473,382
Additions to mining concessions, development costs, property, plant and equipment		18,429			6,225			2,984			1,810			18,858			29,572			13,159			17,141			118			-			-			-			1,816			1,158			-			-			-			111,270			-			111,270

																																														Equity accounted investees
	Ucchuchacua (Operation)			Orcopampa (Operation)			Julcani (Operation)			Mallay (Operation)			Tambomayo (Operation)			Colquijirca (Operation)			La Zanja (Operation)			Exploration and development mining projects			Construction and engineering			Energy generation and transmission			Insurance brokerage			Rental of mining concessions			Holding of investment in shares			Industrial activities			Corporate			Minera Yanacocha S.R.L.			Sociedad Minera Cerro Verde S.A.A			Compañía Minera Coimolache S.A.			Total operating segments			Adjustments and eliminations			Total
	US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)
Year 2017
Results:
Continuing operations
Operating income
Net sale of goods		272,334			256,960			42,785			36,736			118,966			322,653			165,319			-			-			-			-			-			-			6,317			34,650			645,176			3,202,931			203,790			5,308,617			(4,084,675	)		1,223,942
Net sale of services		-			-			-			-			-			-			-			-			10,603			60,639			14,377			-			615			19,658			-			21,870			-			-			127,762			(98,065	)		29,697
Royalty income		-			-			-			-			-			-			-			-			-			-			-			20,739			-			-			-			-			-			-			20,739			-			20,739
Total operating income		272,334			256,960			42,785			36,736			118,966			322,653			165,319			-			10,603			60,639			14,377			20,739			615			25,975			34,650			667,046			3,202,931			203,790			5,457,118			(4,182,740	)		1,274,378
Operating costs
Cost of sales of goods, excluding depreciation and amortization		(143,288	)		(115,574	)		(31,190	)		(22,783	)		(53,555	)		(193,874	)		(102,474	)		-			-			-			-			-			-			(6,043	)		(34,029	)		(746,918	)		(1,768,238	)		(121,021	)		(3,338,987	)		2,711,554			(627,433	)
Cost of services, excluding depreciation and amortization		-			-			-			-			-			-			-			-			(9,393	)		(25,556	)		-			-			-			(9,354	)		-			(2,062	)		-			-			(46,365	)		33,411			(12,954	)
Exploration in operating units		(27,068	)		(38,820	)		(13,009	)		(5,617	)		(9,543	)		-			(871	)		-			-			-			-			-			-			-			-			-			-			-			(94,928	)		-			(94,928	)
Depreciation and amortization		(23,899	)		(8,846	)		(8,122	)		(3,568	)		(42,789	)		(57,199	)		(48,385	)		-			(129	)		(9,651	)		-			-			-			(11,134	)		-			-			-			-			(213,722	)		-			(213,722	)
Mining royalties		(2,280	)		(22,436	)		(354	)		(333	)		(998	)		(3,317	)		(1,499	)		-			-			-			-			-			-			-			-			-			-			-			(31,217	)		-			(31,217	)
Total operating costs		(196,535	)		(185,676	)		(52,675	)		(32,301	)		(106,885	)		(254,390	)		(153,229	)		-			(9,522	)		(35,207	)		-			-			-			(26,531	)		(34,029	)		(748,980	)		(1,768,238	)		(121,021	)		(3,725,219	)		2,744,965			(980,254	)
Gross profit (loss)		75,799			71,284			(9,890	)		4,435			12,081			68,263			12,090			-			1,081			25,432			14,377			20,739			615			(556	)		621			(81,934	)		1,434,693			82,769			1,731,899			(1,437,775	)		294,124
Operating expenses, net
Administrative expenses		(19,473	)		(18,281	)		(2,878	)		(2,931	)		(9,139	)		(13,061	)		(2,814	)		(1,604	)		(3,606	)		(2,423	)		(12,288	)		(90	)		(413	)		(1,203	)		443			(4,760	)		-			(3,829	)		(98,350	)		14,753			(83,597	)
Exploration in non-operating areas		(2,676	)		-			-			-			(3,214	)		(1,976	)		(2,870	)		(2,771	)		-			-			-			-			-			-			(5,052	)		-			-			-			(18,559	)		297			(18,262	)
Selling expenses		(6,078	)		(1,016	)		(605	)		(1,045	)		(1,387	)		(10,914	)		(881	)		-			-			(1,264	)		-			-			-			(775	)		(167	)		(3,922	)		(141,669	)		(946	)		(170,669	)		146,581			(24,088	)
Impairment loss of long-lived assets		-			-			-			-			-			-			(21,620	)		-			-			-			-			-			-			-			-			-			-			-			(21,620	)		-			(21,620	)
Provision for contingences and others		(7,040	)		(1	)		(460	)		(139	)		(1,002	)		-			(1,370	)		(4,657	)		100			312			-			-			-			-			378			-			-			-			(13,879	)		-			(13,879	)
Write –off of stripping activity asset		-			-			-			-			-			(13,573	)		-			-			-			-			-			-			-			-			-			-			-			-			(13,573	)		-			(13,573	)
Other, net		(1,799	)		(715	)		(1,403	)		(359	)		(175	)		(2,922	)		(970	)		(94	)		1,129			(94	)		(4	)		(1	)		-			216			(2,012	)		(63,512	)		(258,826	)		(587	)		(332,128	)		318,539			(13,589	)
Total operating expenses, net		(37,066	)		(20,013	)		(5,346	)		(4,474	)		(14,917	)		(42,446	)		(30,525	)		(9,126	)		(2,377	)		(3,469	)		(12,292	)		(91	)		(413	)		(1,762	)		(6,410	)		(72,194	)		(400,495	)		(5,362	)		(668,778	)		480,170			(188,608	)
Operating profit (loss)		38,733			51,271			(15,236	)		(39	)		(2,836	)		25,817			(18,435	)		(9,126	)		(1,296	)		21,963			2,085			20,648			202			(2,318	)		(5,789	)		(154,128	)		1,034,198			77,407			1,063,121			(957,605	)		105,516
Other income (expense),net
Share in the results of associates under equity method		-			-			-			-			-			-			-			-			-			8,573			-			-			(66,187	)		-			21,194			-			-			-			(36,420	)		49,627			13,207
Finance income		-			-			-			-			-			179			670			-			-			139			1			7			1			79			5,614			5,831			5,350			220			18,091			(12,574	)		5,517
Net gain (loss) from currency exchange difference		31			(63	)		(75	)		(11	)		10			310			48			537			105			294			(75	)		(41	)		(4	)		497			1,365			3,636			13,288			(174	)		19,678			(16,750	)		2,928
Finance costs		(285	)		(354	)		(106	)		(72	)		(372	)		(12,017	)		(1,919	)		(131	)		(370	)		(10,354	)		(6	)		(2	)		(2	)		(941	)		(8,980	)		(23,766	)		(216,912	)		(3,304	)		(279,893	)		245,270			(34,623	)
Total other income (expense), net		(254	)		(417	)		(181	)		(83	)		(362	)		(11,528	)		(1,201	)		406			(265	)		(1,348	)		(80	)		(36	)		(66,192	)		(365	)		19,193			(14,299	)		(198,274	)		(3,258	)		(278,544	)		265,573			(12,971	)
Profit (loss) before income tax		38,479			50,854			(15,417	)		(122	)		(3,198	)		14,289			(19,636	)		(8,720	)		(1,561	)		20,615			2,005			20,612			(65,990	)		(2,683	)		13,404			(168,427	)		835,924			74,149			784,577			(692,032	)		92,545
Income tax		(1,101	)		(1,085	)		(153	)		(124	)		(538	)		(3,903	)		6,841			-			(400	)		(3,491	)		(742	)		(6,044	)		(38	)		1,818			(9,052	)		(7,026	)		(486,043	)		(23,362	)		(534,443	)		516,431			(18,012	)
Profit (loss) from continued operations		37,378			49,769			(15,570	)		(246	)		(3,736	)		10,386			(12,795	)		(8,720	)		(1,961	)		17,124			1,263			14,568			(66,028	)		(865	)		4,352			(175,453	)		349,881			50,787			250,134			(175,601	)		74,533
Loss from discontinued operations, see note 1(e)																																																														(10,098	)
Net profit																																																														64,435
Total assets		146,464			54,114			20,922			18,923			538,057			792,594			190,310			342,759			14,004			360,610			9,004			6,611			988,841			109,669			1,931,224			2,019,332			7,691,007			380,534			15,614,979			(11,282,166	)		4,332,813
Total liabilities		49,723			42,242			18,099			6,092			32,501			388,899			87,008			14,527			5,153			205,247			4,616			2,378			414			20,245			425,413			1,360,217			2,501,845			150,743			5,315,362			(4,046,176	)		1,269,186

Other segment information
Investment in associates		-			-			-			-			-			-			-			-			-			-			-			-			-			-			1,536,887			-			-			-			1,536,887			-			1,536,887
Additions to mining concessions, development costs, property, plant and equipment		18,127			12,674			1,951			1,796			131,119			61,060			17,326			13,733			3			852			14			-			-			459			393			-			-			-			259,507			-			259,507

	Ucchuchacua (Operation)			Orcopampa (Operation)			Julcani (Operation)			Mallay (Operation)			Tambomayo (Operation)			Colquijirca (Operation)			La Zanja (Operation)			Exploration and development mining projects			Construction and engineering			Energy generation and transmission			Insurance brokerage			Rental of mining concessions			Holding of investment in shares			Industrial activities			Corporate			Minera Yanacocha S.R.L.			Sociedad Minera Cerro Verde S.A.A			Compañía Minera Coimolache S.A.			Total operating segments			Adjustments and eliminations			Total
	US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)

Year 2016
Results:
Continuing operations
Operating income
Net sale of goods		240,470			244,745			54,666			46,741			-			230,611			178,922			-			-			-			-			-			-			5,982			191,075			761,193			2,384,154			198,873			4,537,432			(3,521,762	)		1,015,670
Net sale of services		-			-			-			-			-			-			-			-			12,633			57,312			12,675			-			615			19,507			-			17,713			-			-			120,455			(91,673	)		28,782
Royalty income		-			-			-			-			-			-			-			-			-			-			-			24,339			-			-			-			-			-			-			24,339			-			24,339
Total operating income		240,470			244,745			54,666			46,741			-			230,611			178,922						12,633			57,312			12,675			24,339			615			25,489			191,075			778,906			2,384,154			198,873			4,682,226			(3,613,435	)		1,068,791
Operating costs
Cost of sales of goods, excluding depreciation and amortization		(118,561	)		(97,325	)		(23,633	)		(23,392	)		-			(178,231	)		(80,873	)		-			-			-			-			-			-			(2,962	)		(190,041	)		(725,740	)		(1,553,040	)		(107,913	)		(3,101,711	)		2,603,899			(497,812	)
Cost of services, excluding depreciation and amortization		-			-			-			-			-			-			-			-			(9,732	)		(25,250	)		-			-			-			(8,723	)		-			(2,951	)		-			-			(46,656	)		35,902			(10,754	)
Exploration in operating units		(31,406	)		(45,111	)		(11,069	)		(7,960	)		-			-			(603	)		-			-			-			-			-			-			-			-			-			-			-			(96,149	)		-			(96,149	)
Depreciation and amortization		(18,541	)		(11,403	)		(6,756	)		(11,393	)		-			(53,637	)		(67,542	)		(27	)		(253	)		(10,904	)		-			(16	)		(221	)		(10,968	)		(986	)		-			-			-			(192,647	)		-			(192,647	)
Mining royalties		(1,687	)		(21,482	)		(381	)		(314	)		-			(2,726	)		(1,021	)		-			-			-			-			-			-			-			-			-			-			-			(27,611	)		-			(27,611	)
Total operating costs		(170,195	)		(175,321	)		(41,839	)		(43,059	)		-			(234,594	)		(150,039	)		(27	)		(9,985	)		(36,154	)		-			(16	)		(221	)		(22,653	)		(191,027	)		(728,691	)		(1,553,040	)		(107,913	)		(3,464,774	)		2,639,801			(824,973	)
Gross profit (loss)		70,275			69,424			12,827			3,682			-			(3,983	)		28,883			(27	)		2,648			21,158			12,675			24,323			394			2,836			48			50,215			831,114			90,960			1,217,452			(973,634	)		243,818
Operating expenses
Administrative expenses		(13,265	)		(13,810	)		(4,582	)		(2,708	)		(3,274	)		(11,802	)		(1,980	)		(3,750	)		(4,492	)		(2,450	)		(12,245	)		(112	)		(227	)		(635	)		(12,083	)		(8,780	)		-			(4,144	)		(100,339	)		18,647			(81,692	)
Exploration in non-operating areas		-			-			-			-			(7,517	)		(1,939	)		(4,619	)		(9,585	)		-			-			-			-			-			-			(4,129	)		-			-			-			(27,789	)		1,200			(26,589	)
Selling expenses		(4,632	)		(1,075	)		(845	)		(1,549	)		-			(10,650	)		(938	)		-			-			(1,124	)		-			-			-			(1,154	)		(115	)		(3,695	)		(131,391	)		(1,128	)		(158,296	)		136,563			(21,733	)
Impairment loss of long-lived assets		-			-			-			-			-			-			-			-			-			-			-			-			-			-			-			(889,499	)		-			-			(889,499	)		889,499			-
Provision for contingencies		1,121			(110	)		(630	)		49			69			-			-			(1,399	)		(286	)		(467	)		-			-			-			-			1,088			-			-			-			(565	)		-			(565	)
Other, net		1,144			874			74			(372	)		421			276			4,237			2,180			2,198			10,994			-			11			(16	)		546			8,081			(122,151	)		(24,107	)		755			(114,855	)		133,812			18,957
Total operating expenses, net		(15,632	)		(14,121	)		(5,983	)		(4,580	)		(10,301	)		(24,115	)		(3,300	)		(12,554	)		(2,580	)		6,953			(12,245	)		(101	)		(243	)		(1,243	)		(7,158	)		(1,024,125	)		(155,498	)		(4,517	)		(1,291,343	)		1,179,721			(111,622	)
Operating profit (loss)		54,643			55,303			6,844			(898	)		(10,301	)		(28,098	)		25,583			(12,581	)		68			28,111			430			24,222			151			1,593			(7,110	)		(973,910	)		675,616			86,443			(73,891	)		206,087			132,196
Other income (expense),net
Share in the results of associates under equity method		-			-			-			-			-			-			-			-			-			4,579			(9	)		-			(448,017	)		-			(370,381	)		-			-			-			(813,828	)		448,507			(365,321	)
Finance income		3			3			1			-			-			256			87			-			8			820			12			-			4			1			7,480			2,132			954			38			11,799			(4,969	)		6,830
Net gain (loss) from currency exchange difference		(203	)		(59	)		(61	)		(46	)		57			(270	)		65			505			5			(138	)		426			(93	)		5			222			2,223			(13,741	)		7,857			(117	)		(3,363	)		6,001			2,638
Finance costs		(379	)		(197	)		(87	)		(41	)		(137	)		(12,554	)		(2,614	)		(163	)		(545	)		(10,564	)		(10	)		(2	)		(14	)		(962	)		(5,156	)		(15,107	)		(80,438	)		(1,614	)		(130,584	)		99,004			(31,580	)
Total other income (expense), net		(579	)		(253	)		(147	)		(87	)		(80	)		(12,568	)		(2,462	)		342			(532	)		(5,303	)		419			(95	)		(448,022	)		(739	)		(365,834	)		(26,716	)		(71,627	)		(1,693	)		(935,976	)		548,543			(387,433	)
Profit (loss) before income tax		54,064			55,050			6,697			(985	)		(10,381	)		(40,666	)		23,121			(12,239	)		(464	)		22,808			849			24,127			(447,871	)		854			(372,944	)		(1,000,626	)		603,989			84,750			(1,009,867	)		754,630			(255,237	)
Income tax		(1,814	)		(1,895	)		(424	)		(365	)		-			7,851			(18,256	)		(245	)		(178	)		(9,224	)		(245	)		(6,761	)		-			461			(22,409	)		(43,126	)		(263,082	)		(27,894	)		(387,606	)		334,102			(53,504	)
Profit (loss) from continued operations		52,250			53,155			6,273			(1,350	)		(10,381	)		(32,815	)		4,865			(12,484	)		(642	)		13,584			604			17,366			(447,871	)		1,315			(395,353	)		(1,043,752	)		340,907			56,856			(1,397,473	)		1,088,732			(308,741	)
Loss from discontinued operations, see note 1(e)																																																														(19,073	)
Net loss																																																														(327,814	)

Total assets		105,950			46,085			25,118			16,958			415,341			763,092			246,106			330,169			22,481			379,964			6,226			7,439			427,439			120,038			2,593,838			2,045,825			7,635,623			334,555			15,522,247			(11,255,832	)		4,266,415
Total liability		35,148			26,536			19,733			7,302			582			353,184			129,689			14,831			11,647			222,324			3,102			2,684			148			29,751			556,172			1,160,102			2,796,342			131,051			5,500,328			(4,281,126	)		1,219,202

Other segment information
Investment in associates		-			-			-			-			-			-			-			-			-			-			-			-			-			-			1,536,607			-			-			-			1,536,607			-			1,536,607
Additions to mining concessions, development costs, property, plant and equipment		28,899			3,451			759			2,729			230,223			51,289			14,995			25,450			27			4,236			39			-			-			3,719			1,018			-			-			-			366,834			-			366,834

Disclosure of reconciliation of segment profit loss [Text Block]

The reconciliation of segment profit (loss) to the consolidated profit (loss) from continued operations follows:

	2018			2017			2016
	US$(000)			US$(000)			US$(000)

Segments profit (loss)		59,534			250,134			(1,397,473	)
Elimination of profit of equity accounted investees, not consolidated (owned by third parties)		(63,777	)		(225,215	)		645,989
Elimination of intercompany sales		(74,637	)		(108,973	)		(251,502	)
Elimination of cost of sales and operating expenses intercompany		76,780			106,726			250,157
Elimination of share in the results of subsidiaries and associates		1,582			49,627			448,507
Others		(3,933	)		2,234			(4,419	)

Consolidated profit (loss) from continued operations		(4,451	)		74,533			(308,741	)

Disclosure of reconciliation of segment assets [Text Block]

The reconciliation of segment assets to the consolidated assets follows:

	2018			2017			2016
	US$(000)			US$(000)			US$(000)

Segments assets		15,369,524			15,614,979			15,522,247
Elimination of assets of equity accounted investees, not consolidated (owned by third parties)		(9,963,853	)		(10,090,873	)		(10,016,003	)
Elimination of the subsidiaries and associates of the Parent company		(1,184,240	)		(1,186,783	)		(1,047,758	)
Elimination of intercompany receivables		(32,444	)		(32,769	)		(192,958	)
Others		28,234			28,259			887

Consolidated assets		4,217,221			4,332,813			4,266,415

Disclosure of reconciliation of segment liabilities [Text Block]

The reconciliation of segment liabilities to the consolidated liabilities follows:

	2018			2017			2016
	US$(000)			US$(000)			US$(000)

Segments liabilities		5,248,748			5,315,362			5,500,328
Elimination of liabilities of equity accounted investees, not consolidated		(4,034,896	)		(4,012,805	)		(4,087,495	)
Elimination of intercompany payables		(27,822	)		(32,769	)		(192,958	)
Others		1,626			(602	)		(673	)

Consolidated liabilities		1,187,656			1,269,186			1,219,202

Disclosure of Detailed Information About Revenue From Contract With Customers [Table Text block]

	Ucchuchacua (Operation)			Orcopampa (Operation)			Julcani (Operation)			Mallay (Operation)			Tambomayo (Operation)			Colquijirca (Operation)			La Zanja (Operation)			Energy generation and transmission		Insurance brokerage		Rental of mining concessions		Holding of investment in shares		Industrial activities		Corporate		Total operating segments			Adjustments and eliminations			Total
	US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)		US$(000)		US$(000)		US$(000)		US$(000)		US$(000)		US$(000)			US$(000)			US$(000)
Year 2018
Revenues by geographic region:
Metal and concentrates sales -
Peru		170,986			10,808			15,261			16,799			63,049			257,559			2,770			-		-		-		-		751		-		537,983			(167	)	537,816
America		-			142,432			-			-			159,530			-			67,756			-		-		-		-		906		-		370,624			-		370,624
Asia		29,382			-			9,115			-			-			82,022			-			-		-		-		-		-		-		120,519			-		120,519
Europe		57,472			-			9,488			-			2,760			-			26,074			-		-		-		-		4,998		-		100,792			-		100,792
		257,840			153,240			33,864			16,799			225,339			339,581			96,600			-		-		-		-		6,655		-		1,129,918			(167	)	1,129,751
Services -
Peru		-			-			-			-			-			-			-			62,962		14,787		-		615		19,909		-		98,273			(74,561	)	23,712
America		-			-			-			-			-			-			-			-		199		-		-		-		-		199			90		289
		-			-			-			-			-			-			-			62,962		14,986		-		615		19,909		-		98,472			(74,471	)	24,001
Royalties -
Peru		-			-			-			-			-			-			-			-		-		20,385		-		-		-		20,385			-		20,385
Total revenue from contracts with customers		257,840			153,240			33,864			16,799			225,339			339,581			96,600			62,962		14,986		20,385		615		26,564		-		1,248,775			(74,638	)	1,174,137

Revenues by type of good or services:
Sales by metal -
Gold		11			149,092			28			49			150,939			18,463			93,358			-		-		-		-		-		-		411,940			(14	)	411,926
Silver		217,843			5,243			35,307			7,045			54,109			46,060			3,583			-		-		-		-		-		-		369,190			(23	)	369,167
Copper		-			(221	)		129			-			-			275,119			-			-		-		-		-		-		-		275,027			(266	)	274,761
Zinc		45,194			-			-			9,382			18,197			101,275			-			-		-		-		-		-		-		174,048			-		174,048
Lead		36,238			-			1,996			3,504			6,703			40,618			-			-		-		-		-		-		-		89,059			-		89,059
Manganese sulfate		-			-			-			-			-			-			-			-		-		-		-		6,655		-		6,655			-		6,655
		299,286			154,114			37,460			19,980			229,948			481,535			96,941			-		-		-		-		6,655		-		1,325,919			(303	)	1,325,616
Commercial deductions		(41,446	)		(874	)		(3,596	)		(3,181	)		(4,609	)		(141,954	)		(341	)		-		-		-		-		-		-		(196,001	)		136		(195,865)
		257,840			153,240			33,864			16,799			225,339			339,581			96,600			-		-		-		-		6,655		-		1,129,918			(167	)	1,129,751
Sales by services -		-			-			-			-			-			-			-			62,962		14,986		-		615		19,909		-		98,472			(74,471	)	24,001
Royalties income -		-			-			-			-			-			-			-			-		-		20,385		-		-		-		20,385			-		20,385
Total revenue from contracts with customers		257,840			153,240			33,864			16,799			225,339			339,581			96,600			62,962		14,986		20,385		615		26,564		-		1,248,775			(74,638	)	1,174,137

	Ucchuchacua (Operation)			Orcopampa (Operation)			Julcani (Operation)			Mallay (Operation)			Tambomayo (Operation)			Colquijirca (Operation)			La Zanja (Operation)			Construction and engineering		Energy generation and transmission		Insurance brokerage		Rental of mining concessions		Holding of investment in shares		Industrial activities		Corporate			Total operating segments			Adjustments and eliminations			Total
	US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)		US$(000)		US$(000)		US$(000)		US$(000)		US$(000)		US$(000)			US$(000)			US$(000)			US$(000)
Year 2017
Revenues by geographic region:
Metal and concentrates sales -
Peru		209,300			17,774			13,049			35,189			34,337			239,317			32,607			-		-		-		-		-		852		705			583,130			(31,887	)		551,243
America		-			239,183			-			-			84,039			459			125,875			-		-		-		-		-		3,776		18,531			471,863			-			471,863
Asia		19,078			-			12,140			-			-			89,501			-			-		-		-		-		-		-		-			120,719			-			120,719
Europe		38,104			-			15,931			1,496			-			3,820			5,513			-		-		-		-		-		1,689		14,780			81,333			-			81,333
		266,482			256,957			41,120			36,685			118,376			333,097			163,995			-		-		-		-		-		6,317		34,016			1,257,045			(31,887	)		1,225,158
Services -
Peru		-			-			-			-			-			-			-			10,014		60,639		14,205		-		615		19,658		-			105,131			(90,228	)		14,903
America		-			-			-			-			-			-			-			589		-		172		-		-		-		-			761			14,033			14,794
		-			-			-			-			-			-			-			10,603		60,639		14,377		-		615		19,658		-			105,892			(76,195	)		29,697
Royalties -
Peru		-			-			-			-			-			-			-			-		-		-		20,739		-		-		-			20,739			-			20,739
Total revenue from contracts with customers		266,482			256,957			41,120			36,685			118,376			333,097			163,995			10,603		60,639		14,377		20,739		615		25,975		34,016			1,383,676			(108,082	)		1,275,594

Revenues by type of good or services:
Sales by metal -
Gold		345			247,909			-			452			80,796			20,301			160,489			-		-		-		-		-		-		32,875			543,167			(31,733	)		511,434
Silver		256,608			9,595			40,384			16,518			27,285			54,629			4,434			-		-		-		-		-		-		1,257			410,710			(935	)		409,775
Copper		-			598			192			-			-			267,737			-			-		-		-		-		-		-		-			268,527			-			268,527
Zinc		31,814			-			-			17,505			7,914			130,790			-			-		-		-		-		-		-		-			188,023			-			188,023
Lead		32,244			-			4,660			8,998			4,735			44,318			-			-		-		-		-		-		-		-			94,955			-			94,955
Manganese sulfate		-			-			-			-			-			-			-			-		-		-		-		-		6,317		-			6,317			-			6,317
Indium																	66			-			-		-		-		-		-		-		-			66			-			66
		321,011			258,102			45,236			43,473			120,730			517,841			164,923			-		-		-		-		-		6,317		34,132			1,511,765			(32,668	)		1,479,097
Commercial deductions		(54,529	)		(1,145	)		(4,116	)		(6,788	)		(2,354	)		(184,744	)		(928	)		-		-		-		-		-		-		(116	)		(254,720	)		781			(253,939	)
		266,482			256,957			41,120			36,685			118,376			333,097			163,995			-		-		-		-		-		6,317		34,016			1,257,045			(31,887	)		1,225,158
Sales by services -		-			-			-			-			-			-			-			10,603		60,639		14,377		-		615		19,658		-			105,892			(76,195	)		29,697
Royalties income -		-			-			-			-			-			-			-			-		-		-		20,739		-		-		-			20,739			-			20,739
Total revenue from contracts with customers		266,482			256,957			41,120			36,685			118,376			333,097			163,995			10,603		60,639		14,377		20,739		615		25,975		34,016			1,383,676			(108,082	)		1,275,594

	Ucchuchacua (Operation)			Orcopampa (Operation)			Julcani (Operation)			Mallay (Operation)			Colquijirca (Operation)			La Zanja (Operation)			Construction and engineering		Energy generation and transmission		Insurance brokerage		Rental of mining concessions		Holding of investment in shares		Industrial activities		Corporate			Total operating segments			Adjustments and eliminations			Total
Year 2016	US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)			US$(000)		US$(000)		US$(000)		US$(000)		US$(000)		US$(000)		US$(000)			US$(000)			US$(000)			US$(000)
Revenues by geographic region:
Peru
Metal and concentrates sales -
Peru		194,647			14,463			13,243			44,671			125,628			180,063			-		-		-		-		-		497		2,261			575,473			(178,740	)	396,733
America		-			229,332			-			-			2191			-			-		-		-		-		-		5,485		160,787			397,795			-		397,795
Asia		798			-			17,943			-			78,726			-			-		-		-		-		-		-		-			97,467			-		97,467
Europe		47,379			-			24,215			1,890			19,836			-			-		-		-		-		-		-		28,609			121,929			-		121,929
		242,824			243,795			55,401			46,561			226,381			180,063			-		-		-		-		-		5,982		191,657			1,192,664			(178,740	)	1,013,924
Services -
Peru		-			-			-			-			-			-			12,633		57,312		12,675		-		615		19,507		-			102,742			(73,960	)	28,782
		-			-			-			-			-			-			12,633		57,312		12,675		-		615		19,507		-			102,742			(73,960	)	28,782
Royalties -
Peru		-			-			-			-			-			-			-		-		-		24,339		-		-		-			24,339			-		24,339
Total revenue from contracts with customers		242,824			243,795			55,401			46,561			226,381			180,063			12,633		57,312		12,675		24,339		615		25,489		191,657			1,319,745			252,700		1,067,045

Revenues by type of good or services:
Sales by metal -
Gold		347			232,940			42			1,374			16,463			179,362			-		-		-		-		-		-		188,120			618,648			(178,045	)	440,603
Silver		260,431			11,279			55,502			25,368			29,560			3,864			-		-		-		-		-		-		3,717			389,721			(3,732	)	385,989
Copper		-			243			230			-			224,176			-			-		-		-		-		-		-		-			224,649			-		224,649
Zinc		12,042			-			-			19,767			110,616			-			-		-		-		-		-		-		-			142,425			-		142,425
Lead		16,281			-			5,142			13,256			24,011			-			-		-		-		-		-		-		-			58,690			-		58,690
Manganese sulfate		-			-			-			-			-			-			-		-		-		-		-		5,982		-			5,982			-		5,982
		289,101			244,462			60,916			59,765			404,826			183,226			-		-		-		-		-		5,982		191,837			1,440,115			(181,777	)	1,258,338
Commercial deductions		(46,277	)		(667	)		(5,515	)		(13,204	)		(178,445	)		(3,163	)		-		-		-		-		-		-		(180	)		(247,451	)		3,037		(244,414)
		242,824			243,795			55,401			46,561			226,381			180,063			-		-		-		-		-		5,982		191,657			1,192,664			(178,740	)	1,013,924
Sales by services -		-			-			-			-			-			-			12,633		57,312		12,675		-		615		19,507		-			102,742			(73,960	)	28,782
Royalties income -		-			-			-			-			-			-			-		-		-		24,339		-		-		-			24,339			-		24,339
Total revenue from contracts with customers		242,824			243,795			55,401			46,561			226,381			180,063			12,633		57,312		12,675		24,339		615		25,489		191,657			1,319,745			(252,700	)	1,067,045