Property, plant, equipment and development costs - Estimates prices for the current and long-term periods (Details)	Dec. 31, 2024 $ / t $ / oz	Dec. 31, 2023 $ / t $ / oz	Dec. 31, 2022 $ / t $ / oz
Less than 1 year \| Gold per ounce [Member]
Property, plant, equipment and development costs
Commodity price estimates \| $ / oz	2,000	1,900	1,750
Less than 1 year \| Silver [Member]
Property, plant, equipment and development costs
Commodity price estimates \| $ / oz	26	23	21
Less than 1 year \| Copper [Member]
Property, plant, equipment and development costs
Commodity price estimates	8,900	8,500	7,900
Less than 1 year \| Lead [Member]
Property, plant, equipment and development costs
Commodity price estimates	1,900	2,050	1,900
Less than 1 year \| Zinc [Member]
Property, plant, equipment and development costs
Commodity price estimates	2,500	2,600	3,000
Between 1 and 2 years \| Gold per ounce [Member]
Property, plant, equipment and development costs
Commodity price estimates \| $ / oz	2,304	2,036	1,735
Between 1 and 2 years \| Silver [Member]
Property, plant, equipment and development costs
Commodity price estimates \| $ / oz	30	27	23.17
Between 1 and 2 years \| Copper [Member]
Property, plant, equipment and development costs
Commodity price estimates	10,175	10,822	9,625
Between 1 and 2 years \| Lead [Member]
Property, plant, equipment and development costs
Commodity price estimates	2,185	2,449	2,181
Between 1 and 2 years \| Zinc [Member]
Property, plant, equipment and development costs
Commodity price estimates	2,721	3,071	2,648