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Segmented information - Segmented assets and liabilities (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
SEGMENTED ASSETS AND LIABILITIES |  |
Capital expenditure | $ 292.9 | $ 247.3
Total assets | 2,243.5 | 2,476.8
Total liabilities | 1,284.0 | 1,520.9
Total capital expenditures | 292.9 | 247.3
Corporate & Other |  |
SEGMENTED ASSETS AND LIABILITIES |  |
Assets | 196.2 | 498.0
Liabilities | 425.5 | 524.6
Capital expenditure | 0.1 | 0.1
Rainy River |  |
SEGMENTED ASSETS AND LIABILITIES |  |
Assets | 1,067.4 | 1,077.1
Liabilities | 340.1 | 371.5
Capital expenditure | 144.8 | 102.9
New Afton |  |
SEGMENTED ASSETS AND LIABILITIES |  |
Assets | 979.9 | 901.7
Liabilities | 518.4 | 624.8
Capital expenditure | $ 148.0 | $ 144.3

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