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Mining interests - Carrying amount (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Mining Interests |  |
Property, plant and equipment | $ 1,687.1 | $ 1,927.2
New Afton |  |
Mining Interests |  |
Property, plant and equipment | 843.8 | 1,032.3
Rainy River |  |
Mining Interests |  |
Property, plant and equipment | 839.4 | 890.4
Other |  |
Mining Interests |  |
Property, plant and equipment | 3.9 | 4.5
Depletable |  |
Mining Interests |  |
Property, plant and equipment | 1,142.8 | 755.1
Depletable | New Afton |  |
Mining Interests |  |
Property, plant and equipment | 684.6 | 373.5
Depletable | Rainy River |  |
Mining Interests |  |
Property, plant and equipment | 458.2 | 381.6
Depletable | Other |  |
Mining Interests |  |
Property, plant and equipment | 0.0 | 0.0
Non- depletable |  |
Mining Interests |  |
Property, plant and equipment | 4.0 | 367.2
Non- depletable | New Afton |  |
Mining Interests |  |
Property, plant and equipment | 0.0 | 359.9
Non- depletable | Rainy River |  |
Mining Interests |  |
Property, plant and equipment | 2.9 | 6.2
Non- depletable | Other |  |
Mining Interests |  |
Property, plant and equipment | 1.1 | 1.1
Plant & equipment |  |
Mining Interests |  |
Property, plant and equipment | 358.2 | 692.4
Plant & equipment | New Afton |  |
Mining Interests |  |
Property, plant and equipment | 78.1 | 275.2
Plant & equipment | Rainy River |  |
Mining Interests |  |
Property, plant and equipment | 277.3 | 413.8
Plant & equipment | Other |  |
Mining Interests |  |
Property, plant and equipment | 2.8 | 3.4
Construction in progress |  |
Mining Interests |  |
Property, plant and equipment | 182.1 | 112.5
Construction in progress | New Afton |  |
Mining Interests |  |
Property, plant and equipment | 81.1 | 23.7
Construction in progress | Rainy River |  |
Mining Interests |  |
Property, plant and equipment | 101.0 | 88.8
Construction in progress | Other |  |
Mining Interests |  |
Property, plant and equipment | $ 0.0 | $ 0.0

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- Definition The amount of property, plant and equipment including right-of-use assets whose underlying assets would be presented as property, plant and equipment if they were owned. [Refer: Property, plant and equipment; Right-of-use assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 16 -IssueDate 2024-01-01 -Paragraph 73 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2024-en-r&anchor=para_73_e&doctype=Standard -URIDate 2024-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2024-01-01 -Paragraph 47 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_a&doctype=Standard -URIDate 2024-03-27 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 54 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_a&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition . + References No definition available. + Details
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- Details
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