Property, plant and equipment - Additional information (Details) $ in Millions	12 Months Ended
Dec. 31, 2024 USD ($) $ / oz
Disclosure of detailed information about property, plant and equipment [abstract]
Increase or decrease in long-term gold price (usd per oz) \| $ / oz	50
Recoverable amount due to gold price change	$ 28
Increase (decrease) in discount rate	0.25%
Increase in the discount rate, increase in the recoverable amount	$ 19
Decrease in discount rate, decrease in the recoverable amount	$ 19

Sensitivity Analysis, Decrease Discount Rate, Decrease in Fair Value of Recoverable Amount

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Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Percent

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Sensitivity Analysis For Types Of Market Risk, Reasonably Possible Change In Risk Variable, Price Per Unit

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Sensitivity Analysis, Increase (Decrease) Of Fair Value Less Costs Of Disposal Due To Gold Price Change

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Sensitivity Analysis, Increase Discount Rate, Increase in Fair Value of Recoverable Amount

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