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Cost of sales, without considering depreciation and amortization | 12 Months Ended
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Dec. 31, 2020
Disclosure of cost of sales [Line Items] |
Cost of sales, without considering depreciation and amortization | 21. Cost of sales, without considering depreciation and amortization (a)The cost of sales of goods is made up as follows:
|  | 2020 |  | 2019 |  | 2018
|  | US$(000) |  | US$(000) |  | US$(000)
Beginning balance of finished goods and products in process, net of depreciation and amortization |  | 31,938 |  | 49,206 |  | 37,640
Cost of production |  |  |  |  |  |
Services provided by third parties |  | 143,652 |  | 196,895 |  | 243,410
Consumption of materials and supplies |  | 70,942 |  | 96,351 |  | 133,961
Direct labor |  | 62,885 |  | 79,076 |  | 93,122
Electricity and water |  | 36,504 |  | 44,583 |  | 50,215
Maintenance and repair |  | 22,235 |  | 19,729 |  | 24,415
Short-term and low-value lease |  | 16,289 |  | 20,784 |  | 23,539
Transport |  | 12,234 |  | 16,341 |  | 30,819
Insurances |  | 12,036 |  | 12,235 |  | 11,311
Provision (reversal) for impairment of finished goods and product in progress, note 8(c) |  | 5,054 |  | (2,143) |  | 4,521
Other minor |  | 11,916 |  | 11,755 |  | 9,634
Total cost of production of the period |  | 393,747 |  | 495,606 |  | 624,947
Final balance of products in process and finished goods, net of depreciation and amortization |  | (31,797) |  | (31,938) |  | (49,206)
Cost of sales of goods, without considering depreciation and amortization |  | 393,888 |  | 512,874 |  | 613,381
(b)The cost of services is made up as follows:
|  | 2020 |  | 2019 |  | 2018
|  | US$(000) |  | US$(000) |  | US$(000)
Electricity and water |  | 668 |  | 589 |  | 249
Direct labor |  | 371 |  | 1,231 |  | 2,128
Services provided by third parties |  | 189 |  | 331 |  | 382
Transport |  | 87 |  | 148 |  | 50
Insurances |  | 81 |  | 163 |  | 86
Maintenance and repair |  | 55 |  | 186 |  | 543
Consumption of materials and supplies |  | 20 |  | 497 |  | 675
Short-term and low-value lease |  | 6 |  | 89 |  | 92
Other minor |  | 77 |  | 144 |  | 113
|  | 1,554 |  | 3,378 |  | 4,318
Sociedad Minera Cerro Verde S.A.A. [Member] |
Disclosure of cost of sales [Line Items] |
Cost of sales, without considering depreciation and amortization | 15. Cost of sales This item is made up as follows:
|  | For the year ended |  | For the year ended |  | For the year ended
|  | December 31, 2020 |  | December 31, 2019 |  | December 31, 2018
|  | US$(000) |  | US$(000) |  | US$(000)
Materials and supplies |  | 581,658 |  | 693,292 |  | 693,316
Depreciation and amortization (see Note 7 and 2(i)) |  | 451,001 |  | 523,512 |  | 512,298
Labor (a) |  | 288,104 |  | 285,081 |  | 357,692
Energy |  | 200,794 |  | 228,853 |  | 254,243
Third-party services |  | 164,590 |  | 181,215 |  | 159,514
Incremental costs related to COVID-19 pandemic (b) |  | 95,702 |  | — |  | —
Depreciation for right-of-use assets (see Note 7 and 10(a)) |  | 11,320 |  | 11,488 |  | —
Change in finished goods inventory |  | 10,391 |  | (2,290) |  | (5,723)
Variable lease payments, low-value and short-term leases (see Note 10(a)) |  | 7,399 |  | 7,069 |  | —
OEFA and OSINERGMIN contributions (c) |  | 5,889 |  | 6,828 |  | 7,904
Management Fees |  | 2,000 |  | 2,923 |  | 2,743
Change in work in process inventory |  | (49,575) |  | (23,427) |  | (8,513)
Other costs |  | 39,982 |  | 47,033 |  | 45,402
|  | 1,809,255 |  | 1,961,577 |  | 2,018,876
(a)The year ended December 31, 2020, includes US$28.9 million related to profit sharing for 2020 and US$8.3 million as a result of the recognition of contingent liabilities for prior years that are open for inspection for the tax authority (US$32.2 million for the year ended December 31, 2019 and US$60.2 million for the year ended December 31, 2018). (b)The Company recognized charges totaling US$95.7 million for the year ended December 31, 2020, associated with the COVID-19 pandemic and revised operating plans. These charges, none of which were capitalized into inventory, are made up as follows:
|  | For the year ended
|  | December 31, 2020
|  | US$(000)
Incremental costs (i) |  | 51,071
Labor and other employee expenses (ii) |  | 29,705
Severance costs (iii) |  | 7,485
Capital project write-off |  | 6,255
Exceptional contributions and donations |  | 1,186
|  | 95,702
(i)Represents incremental costs associated with care and maintenance status as part of Peru’s declaration of a National Emergency as a result of the COVID-19 outbreak, which restricted the Company’s operations. The costs primarily include depreciation (US$21.9 million, see Note 7), labor costs (US$13.8 million), services (US$8.6 million) and other costs (US$6.8 million). Refer to Note 1(c) for additional information. (ii)Represents labor costs and other expenses associated to the implementation of the Surveillance, Prevention and Control Plan as part of gradual resumption of operations. Refer to Note 1(c) for additional information. (iii)Includes severance costs associated with employee retirement programs of US$7.1 million as part of the cost saving initiatives planned in the Company’s revised operating plans. Refer to Note 1(c) for additional information. (c)The Company is subject to OSINERGMIN and OEFA royalties. The calculation for the OSINERGMIN royalty is 0.14% of invoiced sales for the year 2020 (0.13% for the year 2019 and 0.14% for the year 2018), and the calculation for the OEFA royalty is 0.10% of invoiced sales for the year 2020 (0.11% for the year 2019 and 2018). In compliance with corporate policies, the Company recognizes administrative costs as an inventory cost (approximately US$35.6 million for the year ended December 31, 2020, US$32.0 million for the year ended December 31, 2019, and US$30.7 million for the year ended December 31, 2018). The effect of this policy is immaterial to the financial statements as a whole.
Minera Yanacocha SRL and subsidiary [Member] |
Disclosure of cost of sales [Line Items] |
Cost of sales, without considering depreciation and amortization | 18. Costs applicable to sales
| (a) |  | This caption is made up as follows:
|  | 2020 |  | 2019 |  | 2018
|  | US$(000) |  | US$(000) |  | US$(000)
Beginning balance of finished goods and in-process |  | 302,382 |  | 341,213 |  | 345,489
Beginning balance of provision for net realizable value, note 8(b) |  | (47,925) |  | (89,127) |  | (62,540)
Royalties to related parties, note 1(a) and note 24 |  | 18,638 |  | 22,297 |  | 20,385
Mining royalties to the government |  | 7,570 |  | 9,255 |  | 2,875
Consumption of supplies |  | 138,041 |  | 200,036 |  | 215,863
Personnel expenses |  | 61,298 |  | 72,325 |  | 82,645
Other services |  | 31,864 |  | 41,120 |  | 43,671
Maintenance |  | 17,415 |  | 26,645 |  | 22,585
Power |  | 20,241 |  | 23,619 |  | 24,203
Depreciation and amortization, note 2.4(k) and note 10 |  | 140,252 |  | 144,862 |  | 156,212
Workers' profit sharing |  | 17,199 |  | 12,804 |  | 3,837
Incremental costs related to COVID-19 pandemic and care and maintenance (c) |  | 43,672 |  | — |  | —
Provision for mine closure, note 12(b) |  | 124,780 |  | 142,129 |  | 16,285
Ending balance of provision for net realizable value, note 8(b) |  | 13,287 |  | 47,925 |  | 89,127
Ending balance of finished goods and in-process |  | (222,258) |  | (302,382) |  | (341,213)
|  | 666,456 |  | 692,721 |  | 619,424
| (b) |  | For the years ended December 31, 2020, 2019 and 2018, the cost of inventories recognized in cost of sales was US$299,955, US$326,790 and US$327,459, respectively.
| (c) |  | The Company recognized charges totaling US$43.7 million for the year ended December 31, 2020, associated with the COVID-19 pandemic and revised operating plans. These charges, none of which were capitalized into inventory, are made up as follows
|  | For the year ended to
|  | December 31, 2020
|  | US$(000)
Incremental costs (i) |  | 27,157
Personnel expenses (i) |  | 11,446
Labor expenses (ii) |  | 5,069
|  | 43,672
| (i) |  | Represents incremental costs associated with care and maintenance status as part of Peru’s declaration of a National Emergency as a result of the COVID-19 outbreak, which restricted the Company’s operations. The costs primarily include labor costs (US$14.3 million), services (US$9.5 million) and other costs (US$3.3 million).
| (ii) |  | Expenses associated to the implementation of the Surveillance, Prevention and Control Plan as part of gradual resumption of operations. Refer to Note 1(c) for additional information.
| (iii) |  | Represents mainly payroll premiums distributed to employees.

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