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SEGMENTED INFORMATION - Balance Sheet (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Disclosure of operating segments [line items] |  |
Total non- current assets | $ 3,020.5 | $ 2,758.8
Total assets | 3,971.6 | 4,154.3
Total liabilities | 1,654.5 | 1,608.8
Gold mines |  |
Disclosure of operating segments [line items] |  |
Total non- current assets | 1,779.3 | 2,007.1
Total assets | 2,252.1 | 2,684.9
Total liabilities | 851.8 | 889.3
Gold mines | Burkina Faso |  |
Disclosure of operating segments [line items] |  |
Total non- current assets | 860.0 | 976.9
Total assets | 1,153.4 | 1,332.5
Total liabilities | 275.4 | 284.4
Gold mines | Suriname |  |
Disclosure of operating segments [line items] |  |
Total non- current assets | 579.5 | 698.5
Total assets | 730.0 | 1,003.4
Total liabilities | 315.7 | 399.0
Gold mines | Canada |  |
Disclosure of operating segments [line items] |  |
Total non- current assets | 339.8 | 331.7
Total assets | 368.7 | 349.0
Total liabilities | 260.7 | 205.9
Côté Gold Project |  |
Disclosure of operating segments [line items] |  |
Total non- current assets | 1,022.8 | 566.8
Total assets | 1,118.1 | 618.2
Total liabilities | 109.0 | 35.6
Exploration and evaluation and development |  |
Disclosure of operating segments [line items] |  |
Total non- current assets | 120.0 | 85.7
Total assets | 148.3 | 234.3
Total liabilities | 9.4 | 11.6
Corporate |  |
Disclosure of operating segments [line items] |  |
Total non- current assets | 98.4 | 99.2
Total assets | 453.1 | 616.9
Total liabilities | $ 684.3 | $ 672.3

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