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Reconciliation between net income and Partners' Equity determined under IFRS and U.S. GAAP (Tables) | 12 Months Ended
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Dec. 31, 2020
Minera Yanacocha SRL and subsidiary [Member] |
Disclosure Of Reconciliation between net income and Partners' Equity determined under IFRS and U.S. GAAP [Line Items] |
Disclosure of detailed information about adjustments for reconciliation of financial position and financial performance between IFRS and US GAAP | The following is a summary of the adjustment to net income for the years ended December 31, 2020, 2019 and 2018, and to partners' equity as of December 31, 2020, 2019 and 2018 that would be required if U.S. GAAP had been applied instead of IFRS in the consolidated financial statements:
|  | 2020 |  | 2019 |  | 2018
|  | US$(000) |  | US$(000) |  | US$(000)
Loss for the year under IFRS |  | (165,449) |  | (95,257) |  | (81,517)
Items increasing (decreasing) reported net profit: |  |  |  |  |  |
Reversal of depreciation of assets impaired under IFRS, note 24(a) |  | (97,352) |  | (205,653) |  | (320,424)
Reversal of depreciation of assets impaired under U.S. GAAP, note 24(a) |  | 104,108 |  | 204,276 |  | 254,006
Stripping activity asset, note 24(b) |  | (32,169) |  | 7,533 |  | 18,227
Reclamation and mine closure, note 24(c) |  | (61,555) |  | 54,873 |  | (20,537)
Asset retirement costs, note 24(c) |  | 16,702 |  | 14,504 |  | 89,280
Inventories, note 24(d) |  | (929) |  | (7,740) |  | (10,217)
Contingencies, note 24(e) |  | — |  | — |  | 1,228
Debt instrument interest, note 24(f) |  | 1,497 |  | 1,497 |  | 735
Interest regarding tax claim, note 24(g) |  | (16,496) |  | 16,839 |  | —
Income tax payable, including fines, note 24(g) |  | (11,920) |  | 12,168 |  | —
Others |  | 20 |  | 276 |  | 151
|  | (98,094) |  | 98,573 |  | 12,449
Income (loss) for the year under U.S. GAAP |  | (263,543) |  | 3,316 |  | (69,068)
|  | 2020 |  | 2019 |  | 2018
|  | US$(000) |  | US$(000) |  | US$(000)
Partners' equity under IFRS |  | 324,387 |  | 489,712 |  | 583,723
Items increasing (decreasing) reported partners' equity: |  |  |  |  |  |
Impairment loss for IFRS, note 24(a) |  | 2,469,188 |  | 2,469,188 |  | 2,469,188
Reversal of depreciation of assets impaired under IFRS, note 24(a) |  | (1,297,689) |  | (1,200,337) |  | (994,684)
Elimination of impairment loss recorded under U.S. GAAP, note 24(a) |  | (933,200) |  | (933,200) |  | (933,200)
Reversal of depreciation of assets impaired under U.S. GAAP note 24(a) |  | 800,296 |  | 696,188 |  | 491,912
Stripping activity asset, note 24(b) |  | (40,409) |  | (8,240) |  | (15,773)
Asset retirement cost, note 24(c) |  | (29,149) |  | (59,160) |  | (1,026)
Reclamation and mine closure, note 24(c) |  | 64,971 |  | 139,834 |  | 12,323
Inventories, note 24(d) |  | (5,766) |  | (4,837) |  | 2,903
Debt instruments, note 24(f) |  | 45,424 |  | 43,927 |  | 42,430
Contingencies, note 24(e) |  | 1,228 |  | 1,228 |  | 1,228
Income tax payable contingency, including fines note 24(g) |  | — |  | 12,168 |  | —
Interest regarding tax claim, note 24(g) |  | — |  | 16,839 |  | —
Others |  | 3,681 |  | 3,072 |  | 2,776
|  | 1,078,575 |  | 1,176,679 |  | 1,078,077
Partners' equity under U.S. GAAP |  | 1,402,962 |  | 1,666,382 |  | 1,661,800
Sociedad Minera Cerro Verde S.A.A. [Member] |
Disclosure Of Reconciliation between net income and Partners' Equity determined under IFRS and U.S. GAAP [Line Items] |
Disclosure of detailed information about adjustments for reconciliation of financial position and financial performance between IFRS and US GAAP | The following is a summary of the main adjustments to net income for the years ended December 31, 2020, 2019 and 2018 and to shareholders' equity as of December 31, 2020, 2019 and 2018 that would be required if U.S. GAAP had been applied instead of IFRS in the financial statements:
|  | 2020 |  | 2019 |  | 2018
|  | US$(000) |  | US$(000) |  | US$(000)
Net profit under IFRS |  | 274,544 |  | 390,377 |  | 119,710
Items increasing (decreasing) reported net profit: |  |  |  |  |  |
Stripping activity asset, net of amortization, note 23 (a) |  | 31,419 |  | (41,508) |  | (64,452)
Inventories valuation, note 23 (b) |  | (906) |  | (53,424) |  | (29,515)
Remediation and mine closure, note 23 (e) |  | 23 |  | 23 |  | 1,351
Deferred workers´ profit sharing, note 23 (c) |  | (24,255) |  | (23,449) |  | (7,079)
Lease activity |  | 1,597 |  | 2,071 |  | —
Deferred income tax, note 23 (d) |  | (6,514) |  | 45,759 |  | 33,291
Other |  | (222) |  | (134) |  | (26)
Net income under U.S. GAAP |  | 275,686 |  | 319,715 |  | 53,280
|  | 2020 |  | 2019 |  | 2018
|  | US$(000) |  | US$(000) |  | US$(000)
Shareholders’ equity under IFRS |  | 5,635,328 |  | 5,359,323 |  | 5,117,732
Items increasing (decreasing) reported shareholder’s equity: |  |  |  |  |  |
Stripping activity asset, net of amortization, note 23 (a) |  | (267,596) |  | (299,015) |  | (257,507)
Inventories valuation, note 23 (b) |  | (217,707) |  | (216,801) |  | (163,377)
Remediation and mine closure, note 23(e) |  | (5,480) |  | (5,503) |  | (5,526)
Deferred workers´ profit sharing note 23(c) and 24 (a) |  | (87,415) |  | (63,160) |  | (39,711)
Lease activity |  | 3,668 |  | 2,071 |  | —
Deferred income tax, note 23d |  | 189,073 |  | 195,587 |  | 149,828
Other |  | (144) |  | 78 |  | 212
Shareholders’ equity under U.S. GAAP |  | 5,249,727 |  | 4,972,580 |  | 4,801,651

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