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Commitments (Tables)
 12 Months Ended
Dec. 31, 2022
Commitments [Abstract]  
Disclosure of detailed information about significant commitments related to the acquisition of royalties and streams [Table Text Block]
Company Project (asset) Installments Triggering events
       
Aquila Resources Inc. Back Forty project
(gold stream)		 US$5.0 million Receipt of all material permits for the construction and operation of the project.
    US$25.0 million Pro rata to drawdowns with construction finance facility.
       
Falco Resources Ltd. Horne 5 project
(silver stream)		 $45.0 million Receipt of all necessary material third-party approvals, licenses, rights of way, surface rights on the property and all material construction permits, positive construction decision, and raising a minimum of $100.0 million in non-debt financing.
    $60.0 million Upon total projected capital expenditure having been demonstrated to be financed.
    $40.0 million
(optional)		 Payable with fourth installment, at sole election of Osisko, to increase the silver stream to 100% of payable silver (from 90%).
       
Metals Acquisition Corp. (i) CSA mine
(silver stream)		 US$75.0 million Closing of the acquisition of the CSA mine by MAC.
       
Metals Acquisition Corp. (i) CSA mine
(copper stream)		 Up to US$75.0 million Closing of the acquisition of the CSA mine by MAC.
       

(i) Refer to Note 11 for details on the proposed transactions.
Disclosure of detailed information about significant commitments for streams and offtakes [Table Text Block]
    Attributable payable production
to be purchased		     Per ounce/carat
cash payment (US$)		     Term of
agreement		     Date of contract  
Interest   Gold     Silver     Diamond     Gold     Silver     Diamond  
Amulsar stream(1),(8),(9)   4.22%     62.5%           $400     $4           40 years     November 2015
Amended Jan. 2019		  
Amulsar offtake(2),(8),(9)   81.91%                 Based on quotational period                 Until delivery of
2,110,425 ounces Au 		    November 2015
Amended Jan. 2019		  
Back Forty stream(3),(9)   18.5%     85%           30% spot price
(max $600) 		    $4           Life of mine     March 2015 (silver)
Nov. 2017 (gold)
Amended Dec. 2021		  
Gibraltar stream(4)         75%                 nil           Life of mine     March 2018
Amended April 2020		  
Mantos Blancos
stream(5)		         100%                 8% spot           Life of mine     September 2015
Amended Aug. 2019		  
Renard stream               9.6%                 Lesser of 40% of sales price or $40     40 years     July 2014
Amended Oct. 2018		  
San Antonio stream   15%     15%           15% spot price     15% spot price           Life of mine     November 2020  
Sasa stream(6)         100%                 $6.21           40 years     November 2015  
Tintic stream(7)   2.5%     2.5%           25% spot price     25% spot price           Life of mine     September 2022  

(1) Stream capped at 89,034 ounces of gold and 434,093 ounces of silver delivered. Subject to multiple buy-down options: 50% for US$34.4 million and US$31.3 million on 2nd and 3rd anniversary of commercial production, respectively.

(2)  Offtake percentage will increase to 84.87% if the operator elects to reduce the gold stream as outlined above. The Amulsar offtake applies to the sales from the first 2,110,425 ounces of refined gold, of which 1,853,751 ounces are attributable to Osisko Bermuda (less any ounces delivered pursuant to the Amulsar stream).

(3) The gold stream will be reduced to 9.25% after the delivery of 105,000 gold ounces.

(4) Osisko will receive from Taseko an amount equal to 100% of Gibco's share of silver production, which represents 75% of Gibraltar mine's production, until reaching the delivery to Osisko of 5.9 million ounces of silver, and 35% of Gibco's share of silver production thereafter. As of September 30, 2022, a total of 1.0 million ounces of silver have been delivered under the stream agreement.

(5) The stream percentage shall be payable on 100% of silver until 19,300,000 ounces have been delivered, after which the stream percentage will be 40%. As of September 30, 2022, a total of 3.4 million ounces of silver have been delivered under the stream agreement.

(6)  3% or consumer price index (CPI) per ounce price escalation after 2016.

(7) 2.5% stream on all metals produced until 27,150 ounces of refined gold have been delivered, and thereafter 2.0% steam on all metals produced.

(8) In December 2019, Lydian International Limited, the owner of the Amulsar project, was granted protection under the Companies' Creditors Arrangement Act. In July 2020, Osisko became a shareholder of Lydian following a credit bid transaction (35.98% as at December 31, 2022).

(9) As of December 31, 2022, these assets were not in production.