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Derivative instruments - Provisionally priced sales (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
GAIN ON THE PROVISIONAL PRICING OF CONCENTRATE SALES |  |
Realized | $ (7.4) | $ 9.1
Unrealized | 2.3 | 1.2
Total gain | (5.1) | 10.3
Gold |  |
GAIN ON THE PROVISIONAL PRICING OF CONCENTRATE SALES |  |
Realized | (1.0) | (0.1)
Unrealized | 0.7 | 0.5
Total gain | (0.3) | 0.4
Copper |  |
GAIN ON THE PROVISIONAL PRICING OF CONCENTRATE SALES |  |
Realized | (6.4) | 9.2
Unrealized | 1.6 | 0.7
Total gain | $ (4.8) | $ 9.9

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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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