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COMMITMENTS AND CONTINGENCIES: - Others (Details) S/ in Millions, $ in Millions |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
Feb. 20, 2020 MWh | Jun. 30, 2022 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2018 USD ($) T | May 31, 2016 MW | Jul. 31, 2014 MW | Jun. 30, 2014 MW | Mar. 31, 2025 USD ($) item | Mar. 31, 2025 PEN (S/) item | Mar. 31, 2025 PEN (S/)
Other commitments: |  |  |  |  |  |  |  |  |  |
Commitment for capital projects | $ |  |  |  |  |  |  |  | $ 305.2 |  |
Peru | Power purchase agreements | Electroperu S.A |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Purchase agreement, contracted power capacity (in megawatts) | MW |  |  |  |  |  |  | 120 |  |  |
Term of power purchase agreement related to sale of power plant |  |  |  |  |  |  | 20 years |  |  |
Peru | Power purchase agreements | Kallpa |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Purchase agreement, contracted power capacity (in megawatts) | MW |  |  |  |  |  | 120 |  |  |  |
Term of power purchase agreement related to sale of power plant |  |  |  |  |  | 10 years |  |  |  |
Peru | Power purchase agreements | Kallpa | Maximum |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Purchase agreement, contracted power capacity (in megawatts) | MW |  |  |  |  | 80 |  |  |  |  |
Mexico | Power purchase agreements | Parque Eolico de Fenicias, S. de R.L. de C.V |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Term of power purchase agreement related to sale of power plant | 20 years |  |  |  |  |  |  |  |  |
Purchase agreement, contracted power capacity (in megawatts per year) | MWh | 611,400 |  |  |  |  |  |  |  |  |
Michiquillay |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Pre-operational period |  | 12 years |  |  |  |  |  |  |  |
Extended pre-operational period |  | 3 years |  |  |  |  |  |  |  |
Investment in projects in next five years | $ |  | $ 20.0 |  |  |  |  |  |  |  |
Period of investment in projects |  | 5 years |  |  |  |  |  |  |  |
Number of meters drilled |  |  |  |  |  |  |  | 145,928 | 145,928 |
Number of drill core samples obtained |  |  |  |  |  |  |  | 47,990 | 47,990 |
Michiquillay | Peru | Copper |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Contingent contractual obligation | $ |  |  |  | $ 400.0 |  |  |  |  |  |
Estimated mineralized material (in tons) | T |  |  |  | 2,288,000,000 |  |  |  |  |  |
Copper grade percentage |  |  |  | 0.43% |  |  |  |  |  |
Annual production (in tons) | T |  |  |  | 225,000 |  |  |  |  |  |
Initial mine life |  |  |  | 25 years |  |  |  |  |  |
Contractual obligation paid on project | $ |  |  | $ 12.5 | $ 12.5 |  |  |  |  |  |
Remaining amount to pay if project is developed | $ |  |  | $ 375.0 |  |  |  |  |  |  |
Toquepala Concentrator Expansion | Peru |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  |  |  |  | $ 121.0 | S/ 445.0 |
Commitment liability recorded in the balance sheet | $ |  |  |  |  |  |  |  | 28.5 |  |
Toquepala Concentrator Expansion | Peru | Educational Project |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  |  |  |  | 5.1 | 18.8 |
Toquepala Concentrator Expansion | Peru | Agricultural Projects |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  |  |  |  | 30.6 | 112.4 |
Toquepala Concentrator Expansion | Peru | Construction of Cularjahuira Dam |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  |  |  |  | 4.2 | 15.6 |
Toquepala Concentrator Expansion | Peru | Study of Engineering for Collazas Dam |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  |  |  |  | 0.7 | 2.6 |
Toquepala Concentrator Expansion | Peru | Infrastructure Projects |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  |  |  |  | 16.5 | 60.6 |
Toquepala Concentrator Expansion | Peru | Drinking Water Project |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  |  |  |  | 2.6 | 9.6 |
Toquepala Concentrator Expansion | Peru | Construction of a high-achievement school |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  |  |  |  | 27.8 | 102.1 |
Toquepala Concentrator Expansion | Peru | Works for Taxes |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  |  |  |  | $ 10.9 | S/ 40.0 |
Number of infrastructure projects agreed for construction |  |  |  |  |  |  |  | 2 | 2 |
Development Fund Moquegua Region | Peru |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  |  |  |  | $ 271.9 | S/ 1,000.0 |
Amount committed to funding for school projects |  |  |  |  |  |  |  | $ 4.9 | S/ 18.2 |
Number of schools agreed for construction |  |  |  |  |  |  |  | 3 | 3 |
Development Fund Moquegua Region | Peru | Educational Project |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  |  |  |  | $ 29.5 | S/ 108.4 |
Amount of investment in project |  |  |  |  |  |  |  | 29.0 |  | S/ 106.8
Development Fund Moquegua Region | Peru | Works for Taxes |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  |  |  |  | $ 62.0 | S/ 228.0 |
Number of infrastructure projects agreed for construction |  |  |  |  |  |  |  | 4 | 4 |
Development Fund Moquegua Region | Peru | Funding for Different Projects |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  |  |  |  | $ 68.3 | S/ 251.3 |
Development Fund Moquegua Region | Peru | Water Treatment |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Amount committed to funding for social and infrastructure improvement projects |  |  |  |  |  |  |  | $ 28.7 | S/ 105.5 |
Percentage of progress on construction |  |  |  |  |  |  |  | 55.00% | 55.00% |
Apurimac Region | Works for Taxes |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Amount committed to funding for school projects |  |  |  |  |  |  |  | $ 22.8 | S/ 83.8 |
Number of schools agreed for construction |  |  |  |  |  |  |  | 2 | 2 |
Arequipa Region | Works for Taxes |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Amount committed to funding for school projects |  |  |  |  |  |  |  | $ 29.8 | S/ 109.5 |
Number of schools agreed for construction |  |  |  |  |  |  |  | 2 | 2 |
Amount committed to Finance for past infrastructure project |  |  |  |  |  |  |  | $ 1.7 | S/ 6.3 |
Cajamarca Region | Works for Taxes |  |  |  |  |  |  |  |  |  |
Other commitments: |  |  |  |  |  |  |  |  |  |
Amount committed for funding health projects |  |  |  |  |  |  |  | $ 0.2 | S/ 0.7 |

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