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Income and mining taxes - Deferred income tax (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
DEFERRED TAX LIABILITIES |  |  |
Deferred tax liabilities | $ (66.8) | $ (69.6) |
Deferred tax assets and liabilities |  |  |
Deferred income tax liabilities, net | (66.8) | (69.6) | $ (53.5)
Canada |  |  |
DEFERRED TAX ASSETS |  |  |
Deferred tax assets | 285.6 | 328.4 |
DEFERRED TAX LIABILITIES |  |  |
Deferred tax liabilities | (66.8) | (69.6) |
Unrecognized deferred tax asset | 285.6 | 328.4 |
Deferred tax assets and liabilities |  |  |
Deferred income tax liabilities, net | (66.8) | (69.6) |
Canada | Capital losses |  |  |
DEFERRED TAX ASSETS |  |  |
Deferred tax assets | 6.0 | 7.0 |
Canada | Property, plant and equipment and Mining interests |  |  |
DEFERRED TAX ASSETS |  |  |
Deferred tax assets | 45.5 | 52.9 |
Canada | Tax credits |  |  |
DEFERRED TAX ASSETS |  |  |
Deferred tax assets | 62.7 | 66.5 |
Canada | Ontario Mining Tax |  |  |
DEFERRED TAX ASSETS |  |  |
Deferred tax assets | 43.5 | 53.2 |
Canada | Other |  |  |
DEFERRED TAX ASSETS |  |  |
Deferred tax assets | 127.9 | 148.8 |
Canada | British Columbia Mining Tax |  |  |
DEFERRED TAX LIABILITIES |  |  |
Deferred tax liabilities | $ (66.8) | $ (69.6) |

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