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Reclamation and closure cost obligations (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
RECLAMATION AND CLOSURE COST OBLIGATIONS |  |
Beginning Balance | $ 119.2 | $ 107.0
Reclamation expenditures | (9.8) | (6.8)
Unwinding of discount | 2.2 | 1.7
Revisions to expected cash flows | 48.4 | 25.4
Foreign exchange movement | 0.2 | 1.8
Liabilities sold |  | (9.9)
Ending Balance | 160.2 | 119.2
Less: current portion of closure costs (Note 7) | (5.6) | (5.7)
Non-current portion of closure costs | 154.6 | 113.5
Rainy River |  |
RECLAMATION AND CLOSURE COST OBLIGATIONS |  |
Beginning Balance | 81.4 | 67.0
Reclamation expenditures | (3.6) | (1.2)
Unwinding of discount | 1.6 | 1.0
Revisions to expected cash flows | 30.0 | 12.9
Foreign exchange movement | 0.0 | 1.7
Liabilities sold |  | 0.0
Ending Balance | 109.4 | 81.4
Less: current portion of closure costs (Note 7) | (4.2) | (2.5)
Non-current portion of closure costs | 105.2 | 78.9
New Afton |  |
RECLAMATION AND CLOSURE COST OBLIGATIONS |  |
Beginning Balance | 34.2 | 18.0
Reclamation expenditures | 0.0 | 0.0
Unwinding of discount | 0.6 | 0.2
Revisions to expected cash flows | 14.2 | 15.1
Foreign exchange movement | 0.3 | 0.9
Liabilities sold |  | 0.0
Ending Balance | 49.3 | 34.2
Less: current portion of closure costs (Note 7) | 0.0 | 0.0
Non-current portion of closure costs | 49.3 | 34.2
Cerro San Pedro |  |
RECLAMATION AND CLOSURE COST OBLIGATIONS |  |
Beginning Balance | 3.6 | 12.6
Reclamation expenditures | (6.2) | (5.6)
Unwinding of discount | 0.0 | 0.4
Revisions to expected cash flows | 4.2 | (3.4)
Foreign exchange movement | (0.1) | (0.4)
Liabilities sold |  | 0.0
Ending Balance | 1.5 | 3.6
Less: current portion of closure costs (Note 7) | (1.4) | (3.2)
Non-current portion of closure costs | 0.1 | 0.4
Blackwater |  |
RECLAMATION AND CLOSURE COST OBLIGATIONS |  |
Beginning Balance | 0.0 | 9.4
Reclamation expenditures | 0.0 | 0.0
Unwinding of discount | 0.0 | 0.1
Revisions to expected cash flows | 0.0 | 0.8
Foreign exchange movement | 0.0 | (0.4)
Liabilities sold |  | (9.9)
Ending Balance | 0.0 | 0.0
Less: current portion of closure costs (Note 7) | 0.0 | 0.0
Non-current portion of closure costs | $ 0.0 | $ 0.0

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