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Segmented information - Information about major customers (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
SEGMENTED INFORMATION |  |
Revenues | $ 745.5 | $ 643.4
Major Customer |  |
SEGMENTED INFORMATION |  |
Percentage of entity's revenue | 99.40% | 91.40%
Customer |  |
SEGMENTED INFORMATION |  |
Revenues | $ 741.2 | $ 587.9
New Afton |  |
SEGMENTED INFORMATION |  |
Revenues | 319.6 | 274.7
New Afton | Customers one |  |
SEGMENTED INFORMATION |  |
Revenues | 178.6 | 154.2
New Afton | Customers two |  |
SEGMENTED INFORMATION |  |
Revenues | 138.8 | 93.7
Rainy River |  |
SEGMENTED INFORMATION |  |
Revenues | 425.9 | 368.7
Rainy River | Customers one |  |
SEGMENTED INFORMATION |  |
Revenues | 174.2 | 139.0
Rainy River | Customers two |  |
SEGMENTED INFORMATION |  |
Revenues | 144.0 | 133.2
Rainy River | Customers three |  |
SEGMENTED INFORMATION |  |
Revenues | $ 105.6 | $ 67.8

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