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Expenses - Other (losses) and gains (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
OTHER (LOSSES) AND GAINS |  |
(Loss) gain on foreign exchange | $ (3.1) | $ 6.5
Loss on disposal of assets | (0.3) | (2.0)
Loss on revaluation of investments | (4.4) | (28.0)
Unrealized (loss) gain on revaluation of non-current derivative financial liabilities | (108.2) | 3.0
Gain (loss) on foreign exchange derivative | 3.0 | (2.3)
(Loss) gain on fuel hedge swap contracts | (1.4) | 0.3
Revaluation of CSP's reclamation and closure cost obligation | (0.5) | (2.1)
Other | (0.4) | (1.1)
Total other losses | $ (115.3) | $ (25.7)

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- Definition The gains (losses) resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 85 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_85&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of exchange differences recognised in profit or loss that arise from foreign currency transactions, excluding those arising on financial instruments measured at fair value through profit or loss in accordance with IFRS 9. [Refer: At fair value [member]; Financial instruments, class [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 21 -IssueDate 2023-01-01 -Paragraph 52 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=21&code=ifrs-tx-2023-en-r&anchor=para_52_a&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 35 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_35&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The gains (losses) recognised in other comprehensive income on remeasuring available-for-sale financial assets, before tax, before reclassification adjustments. [Refer: Financial assets available-for-sale] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expired 2023-01-01 -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 20 -Subparagraph a -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_20_a_ii&doctype=Standard&book=b -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expired 2023-01-01 -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 91 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2017-en-b&anchor=para_91_b&doctype=Standard&forcepdf=true -URIDate 2023-03-23 + Details
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- Definition The gains (losses) that the entity does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 102 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_102&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 103 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_103&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition Gains (Losses) On Fuel Swap Hedging Instruments + References No definition available. + Details
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