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Derivative instruments - Provisionally priced sales (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
GAIN ON THE PROVISIONAL PRICING OF CONCENTRATE SALES |  |
Realized | $ 9.1 | $ 9.5
Unrealized | 1.2 | 8.9
Total gain | 10.3 | 18.4
Gold |  |
GAIN ON THE PROVISIONAL PRICING OF CONCENTRATE SALES |  |
Realized | (0.1) | 3.2
Unrealized | 0.5 | 0.7
Total gain | 0.4 | 3.9
Copper |  |
GAIN ON THE PROVISIONAL PRICING OF CONCENTRATE SALES |  |
Realized | 9.2 | 6.3
Unrealized | 0.7 | 8.2
Total gain | $ 9.9 | $ 14.5

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- References No definition available. + Details
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- Definition The gains (losses) on the provisionally pricing of concentrate sales which realised during the reporting period. + References No definition available. + Details
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- Definition Totals gains (losses) on the provisionally pricing of concentrate sales which recognised during the reporting period. + References No definition available. + Details
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- Definition The gains (losses) on the provisionally pricing of concentrate sales which recognised as unrealised during the reporting period. + References No definition available. + Details
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