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Property, plant, equipment and development costs - Estimates prices for the current and long-term periods (Details)
Dec. 31, 2023
$ / t
$ / oz
Dec. 31, 2022
$ / oz
$ / t
Less than 1 year | Gold per ounce [Member]    
Property, plant, equipment and development costs    
Commodity price estimates | $ / oz 1,900 1,750
Less than 1 year | Silver [Member]    
Property, plant, equipment and development costs    
Commodity price estimates | $ / oz 23 21
Less than 1 year | Copper [Member]    
Property, plant, equipment and development costs    
Commodity price estimates 8,500 7,900
Less than 1 year | Lead [Member]    
Property, plant, equipment and development costs    
Commodity price estimates 2,050 1,900
Less than 1 year | Zinc [Member]    
Property, plant, equipment and development costs    
Commodity price estimates 2,600 3,000
Between 1 and 2 years | Gold per ounce [Member]    
Property, plant, equipment and development costs    
Commodity price estimates | $ / oz 2,036 1,735
Between 1 and 2 years | Silver [Member]    
Property, plant, equipment and development costs    
Commodity price estimates | $ / oz 27 23.17
Between 1 and 2 years | Copper [Member]    
Property, plant, equipment and development costs    
Commodity price estimates 10,822 9,625
Between 1 and 2 years | Lead [Member]    
Property, plant, equipment and development costs    
Commodity price estimates 2,449 2,181
Between 1 and 2 years | Zinc [Member]    
Property, plant, equipment and development costs    
Commodity price estimates 3,071 2,648