The amount of deferred tax liabilities or assets. [Refer: Deferred tax liabilities; Deferred tax assets]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2025-01-01
-Paragraph 81
-Subparagraph g
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2025-en-r&anchor=para_81_g_i&doctype=Standard
-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_194_f_i&doctype=Standard
-URIDate 2025-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
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-IssueDate 2025-01-01
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_194_f_i&doctype=Standard
-URIDate 2025-03-27

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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- Definition

The amount of deferred tax assets net of deferred tax liabilities, when the absolute amount of deferred tax assets is greater than the absolute amount of deferred tax liabilities. [Refer: Deferred tax assets; Deferred tax liabilities]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 12
-IssueDate 2025-01-01
-Paragraph 81
-Subparagraph g
-Clause i
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=12&code=ifrs-tx-2025-en-r&anchor=para_81_g_i&doctype=Standard
-URIDate 2025-03-27

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- Definition

The amount of deferred tax liabilities net of deferred tax assets, when the absolute amount of deferred tax liabilities is greater than the absolute amount of deferred tax assets. [Refer: Deferred tax assets; Deferred tax liabilities]

+ References

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Income and mining taxes (Schedule of temporary differences recognized) (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax liability	$ (308.8)	$ (237.8)	$ (255.3)
Property, plant and equipment [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	(65.5)	(54.5)
Deferred income tax liability	526.9	451.6
Pension obligation [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	2.3	2.0
Other employee benefits [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	35.8	25.1
Deferred income tax liability	(1.7)	(1.2)
Decommissioning and restoration provision [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	24.4	19.3
Deferred income tax liability	(12.8)	(11.8)
Non-capital losses [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	53.7	107.3
Deferred income tax liability	(158.7)	(116.7)
Share issuance and debt cost [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	2.9	3.8
Deferred revenue [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	1.8	1.7
Other [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	11.1	(2.1)
Deferred income tax liability	(10.6)	(16.4)
Income tax effect of temporary differences [Member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Deferred income tax asset	66.5	102.6
Deferred income tax liability	343.1	305.5
Deferred income tax liability	$ (276.6)	$ (202.9)