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Other investments - Disclosure of detailed information about other investments (Details) - CAD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Other Investments [Line Items]    
Total $ 73,504 $ 169,010
Fair value through profit or loss (warrants and convertible instruments) [Member]    
Other Investments [Line Items]    
Balance - January 1 47,981 25,063
Acquisitions 4,438 17,754
Exercise of warrants (80) (1,122)
Change in fair value (17,236) 6,286
Acquisition of Tintic by Osisko Development (10,827) 0
Foreign exchange impact revaluation 50 0
Investments held by Osisko Development and deconsolidated on September 30, 2022 (109) 0
Balance - December 31 24,217 47,981
Fair value through other comprehensive (loss) income (common shares) [Member]    
Other Investments [Line Items]    
Balance - January 1 94,231 115,590
Acquisitions 5,260 18,668
Exercise of warrants 0 600
Transfer from associates 15,343 0
Change in fair value (43,486) 7,303
Disposals (21,634) (47,930)
Investments held by Osisko Development and deconsolidated on September 30, 2022 (31,377) 0
Balance - December 31 18,337 94,231
Amortized cost (notes) [Member]    
Other Investments [Line Items]    
Balance - January 1 26,798 16,861
Acquisitions 5,175 12,849
Repayments (2,960) (3,007)
Foreign exchange impact revaluation 1,937 95
Balance - December 31 $ 30,950 $ 26,798