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Income and mining taxes - Deferred income tax (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
DEFERRED TAX LIABILITIES |  |  |
Deferred tax liabilities | $ (69.6) | $ (53.5) |
Deferred tax assets and liabilities |  |  |
Deferred income tax liabilities, net | (69.6) | (53.5) | $ (48.3)
Canada |  |  |
DEFERRED TAX ASSETS |  |  |
Deferred tax assets | 328.4 | 319.7 |
DEFERRED TAX LIABILITIES |  |  |
Deferred tax liabilities | (69.6) | (53.5) |
Unrecognized deferred tax asset | 328.4 | 319.7 |
Deferred tax assets and liabilities |  |  |
Deferred income tax liabilities, net | (69.6) | (53.5) |
Canada | Capital losses |  |  |
DEFERRED TAX ASSETS |  |  |
Deferred tax assets | 7.0 | 19.3 |
Canada | Property, plant and equipment and Mining interests |  |  |
DEFERRED TAX ASSETS |  |  |
Deferred tax assets | 52.9 | 44.6 |
Canada | Tax credits |  |  |
DEFERRED TAX ASSETS |  |  |
Deferred tax assets | 66.5 | 51.3 |
Canada | Ontario Mining Tax |  |  |
DEFERRED TAX ASSETS |  |  |
Deferred tax assets | 53.2 | 58.5 |
Canada | Other |  |  |
DEFERRED TAX ASSETS |  |  |
Deferred tax assets | 148.8 | 146.0 |
Canada | British Columbia Mining Tax |  |  |
DEFERRED TAX LIABILITIES |  |  |
Deferred tax liabilities | $ (69.6) | $ (53.5) |

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