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INTEREST INCOME, DERIVATIVES AND OTHER INVESTMENT GAINS (LOSSES) (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Sep. 08, 2020 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of detailed information about borrowings [line items] |  |  |
Gain on sale of royalties |  | $ 45.9 | $ 0.0
Interest income |  | 4.2 | 8.9
Gains (losses) on non-hedge derivatives and warrants |  | (13.9) | (31.8)
Insurance recoveries2 |  | 10.2 | 0.0
Gain on sale of investment in INV Metals |  | 16.1 | 0.0
Fair value of deferred consideration from the sale of Sadiola |  | 4.6 | 0.0
Gain on establishment of the Rosebel UJV3 |  | 0.0 | 16.9
Gain on sale of 70% interest in the Eastern Borosi property |  | 0.0 | 4.1
Loss on redemption of 7% senior notes |  | 0.0 | (22.5)
Other gains (losses) |  | (0.4) | 0.5
Interest income, derivatives and other investment gains (losses) |  | $ 66.7 | (23.9)
Proportion of property sold |  | 70.00% |
Rosebel UJV |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Gain on establishment of the Rosebel UJV3 |  |  | $ 16.9
7.0% Senior Notes |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Loss on redemption of 7% senior notes | $ (22.5) |  |
7.0% Senior Notes | Fixed interest rate |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Interest rate | 7.00% |  | 7.00%

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