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EXPENSES (Details 2) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Other gains and losses [abstract] |  |  |
Unrealized gain on share purchase warrants |  | $ 0.0 | $ 1.2
Gain (loss) on foreign exchange |  | 6.6 | 43.8
Gain on disposal of El Morro stream |  | 0.0 | 33.0
Other (loss) gain on disposal of assets |  | (0.3) | 0.3
Loss on revaluation of investments |  | (0.2) | (0.2)
Unrealized gain (loss) on revaluation of gold stream obligation (Note 12) |  | 11.7 | (21.8)
Settlement and loss on revaluation of gold price option contracts |  | (4.8) | (6.5)
Gain (loss) on revaluation of copper forward contracts and copper price option contracts |  | 4.8 | (4.4)
Revaluation of CSP's reclamation and closure cost obligation | [1] | (1.0) | 0.0
Other |  | 1.3 | 1.2
Total other gains |  | $ 18.1 | $ 46.6
[1] | Cerro San Pedro has transitioned to the reclamation phase of its mine life cycle effective December 31, 2018. As a result, changes in estimate to Cerro San Pedro’s reclamation and closure cost obligation resulting from revisions to the expected cash flows will be recognized within other gains and losses.

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