Income and mining taxes (Schedule of changes in deferred tax assets and liabilities) (Details) - USD ($) $ in Millions |
12 Months Ended | |
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Dec. 31, 2025 |
Dec. 31, 2024 |
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| Major components of tax expense (income) [abstract] | ||
| Net deferred tax liability balance, beginning of year | $ (237.8) | $ (255.3) |
| Deferred tax expense | (56.4) | (6.9) |
| OCI transactions | (0.7) | (3.2) |
| Foreign currency translation on the deferred tax liability | (13.9) | 27.6 |
| Net deferred tax liability balance, end of year | $ (308.8) | $ (237.8) |
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- References Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of income tax relating to amounts recognised in other comprehensive income. [Refer: Other comprehensive income] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The increase (decrease) in deferred tax liability (asset) resulting from the net exchange differences arising when the financial statements are translated from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Deferred tax liability (asset)] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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