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LONG-TERM DEBT AND CREDIT FACILITY - Uncollateralized Surety and Performance Bonds (Details) $ in Millions, $ in Millions | Dec. 31, 2021 CAD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 CAD ($) | Dec. 31, 2020 USD ($)
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Doyon and Côté Gold |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Bonds outstanding to guarantee asset retirement obligations related to the Doyon division | $ 215.3 | $ 170.1 | $ 215.3 | $ 168.8
Côté Gold project |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |
Bonds outstanding to guarantee asset retirement obligations related to the Doyon division | $ 39.1 | $ 30.9 | $ 39.1 | $ 30.7

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