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Financial expenses and income - Additional inforamtion (Details) - Sociedad Minera Cerro Verde S.A.A. - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Finance Expense [Line Items] |  |
Interest related to the installment payment programs for SMT and disputed mining royalties | $ 14.6 | $ 38.2
Interest of other taxes related to disputed mining royalty | $ 0.7 | 5.6
Interests related to income tax assessment for the year 2013 |  | 31.4
Interests related to uncertain income tax treatments (IFRIC 23) associated primarily to tailing dam income tax |  | 13.1
Interests related to SUNAT assessments |  | $ 8.7

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