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Significant accounting policies (Tables)
12 Months Ended
Dec. 31, 2022
Significant Accounting Policies [Abstract]  
Disclosure of principal subsidiaries and their geographic location [Table Text Block]

As at December 31, 2022:

Entity Jurisdiction Participation Functional currency
Osisko Bermuda Limited Bermuda 100% United States dollar
Osisko Mining (USA) Inc. Delaware 100% United States dollar
       
As at December 31, 2021:      
       
Entity Jurisdiction Participation Functional currency
Osisko Bermuda Limited Bermuda 100% United States dollar
Osisko Mining (USA) Inc. Delaware 100% United States dollar
Osisko Development Corp. (i) Québec 75.1% Canadian dollar
Disclosure of detailed Information about financial instruments [Table Text Block]
Category   Financial instrument
     
Financial assets at amortized cost   Cash
    Notes and loans receivable
Revenues receivable from royalty, stream and other interests
Interest income receivable
Amounts receivable from associates and other receivables
Reclamation deposits (i)
     
Financial assets at fair value through profit or loss   Investments in derivatives and convertible debentures
     
Financial assets at fair value through other comprehensive income or loss   Investments in shares and equity instruments, other than in derivatives
     
Financial liabilities at amortized cost   Accounts payable and accrued liabilities
Liability component of convertible debentures
Borrowings under revolving credit facilities
Equipment financings (i)

i) Related exclusively to Osisko Development, which was deconsolidated on September, 30, 2022 (Note 31).

Disclosure of detailed information about estimated useful life or depreciation rate [Table Text Block]
Leasehold improvements Lease term
Furniture and office equipment 3-5 years
Right-of-use assets Shorter of useful life and lease term