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EXPENSES - Other (losses) and gains (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Other (losses) and gains |  |
Rainy River Underground project costs | $ (3.4) | $ 0.0
(Loss) gain on foreign exchange | (3.7) | 6.6
Loss on disposal of assets | (1.2) | (0.3)
Loss on revaluation of investments | 0.0 | (0.2)
Unrealized gain on revaluation of gold stream obligation (Note 12) | 20.1 | 11.7
Settlement and loss on revaluation of gold price option contracts | (21.7) | (4.8)
Settlement and (loss) gain on revaluation of copper price option contracts | (0.7) | 4.8
Settlement and gain on revaluation of foreign exchange forward contracts | 1.5 | 0.0
Revaluation of Cerro San Pedro's reclamation and closure cost obligation(2) | 0.6 | (1.0)
Gain on receivable associated with Mesquite sale(3) | 4.0 | 0.0
Other | (1.1) | 1.3
Total other (losses) gains | $ (5.6) | $ 18.1

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- Definition The gains (losses) recognised in other comprehensive income on remeasuring available-for-sale financial assets, before tax. [Refer: Financial assets available-for-sale] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 91 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2017-en-b&anchor=para_91_b&doctype=Standard&forcepdf=true -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 20 -Subparagraph a -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_20_a_ii&doctype=Standard&book=b -URIDate 2019-03-27 + 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 2019-01-01 -Paragraph 102 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_102&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 103 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_103&doctype=Standard -URIDate 2019-03-27 + Details
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