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Expenses - Other (losses) and gains (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021
OTHER GAINS AND (LOSSES) |  |  |  |
Gain on foreign exchange |  | $ 6.5 | $ 1.4 |
Loss on disposal of assets |  | (2.0) | (2.0) |
Loss on revaluation of investments |  | (28.0) | (21.3) |
Unrealized gain (loss) on revaluation of non-current derivative financial liabilities |  | 3.0 | (62.9) |
Loss on revaluation of copper price option contracts |  | 0.0 | (1.5) |
(Loss) gain on foreign exchange derivative |  | (2.3) | 1.5 |
Gain on fuel hedge swap contracts |  | 0.3 | 0.0 |
Gain on disposal of Blackwater stream | $ 147.3 | 0.0 | 147.3 |
Revaluation of CSP's reclamation and closure cost obligation |  | (2.1) | (4.2) |
Flow through share premium |  | 0.0 | 1.7 |
Other |  | (1.1) | (2.5) |
Total other (losses) gains |  | $ (25.7) | 57.5 |
Proceeds from sale of Blackwater stream | $ 300.0 |  | $ 300.0 | [1]
[1] | In 2021 the Company disposed of the Blackwater gold stream for $300.0 million. Blackwater stream transaction costs of $2.6 million were paid in 2022.

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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 2022-03-24 -Paragraph 52 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=21&code=ifrs-tx-2022-en-r&anchor=para_52_a&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 35 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_35&doctype=Standard -URIDate 2022-03-24 + 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 Expiry date 2023-01-01 -Name IFRS -Number 7 -IssueDate 2022-03-24 -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 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -Name IAS -Number 1 -IssueDate 2022-03-24 -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 2022-03-24 + Details
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- Definition The cash inflow from the disposal of mining assets. [Refer: Mining assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2022-03-24 -Paragraph 16 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_16&doctype=Standard -URIDate 2022-03-24 + Details
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