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Impairment of long-lived assets (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
IfrsStatementLineItems [Line Items] |  |  |
Impairment (losses) reversals | $ 91,706 | $ (32,870) | $ (114,643)
Magistral Project [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Impairment (losses) reversals |  | (58,435) |
Cerro Pasco C G U [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Impairment (losses) reversals | 108,005 | 22,206 | (42,660)
Morro Agudo [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Impairment (losses) reversals |  | 10,291 | (59,002)
Pukaqaqa Project [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Impairment (losses) reversals |  | 3,978 |
Others Individual Assets [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Impairment (losses) reversals | $ (16,299) | $ (10,910) | $ (12,976)

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