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Basis for preparation, consolidation and accounting policies - Estimated useful lives of right of use assets (Details) - Sociedad Minera Cerro Verde S.A.A. [Member] | 12 Months Ended
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Dec. 31, 2020
Land |
Disclosure of basis for preparation, consolidation and accounting policies [Line Items] |
Estimated useful life of right of use assets | 10 years
Buildings and other constructions | Minimum |
Disclosure of basis for preparation, consolidation and accounting policies [Line Items] |
Estimated useful life of right of use assets | 1 year
Buildings and other constructions | Maximum |
Disclosure of basis for preparation, consolidation and accounting policies [Line Items] |
Estimated useful life of right of use assets | 14 years
Machinery and equipment | Minimum |
Disclosure of basis for preparation, consolidation and accounting policies [Line Items] |
Estimated useful life of right of use assets | 3 years
Machinery and equipment | Maximum |
Disclosure of basis for preparation, consolidation and accounting policies [Line Items] |
Estimated useful life of right of use assets | 14 years

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