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Royalty, stream and other interests (Narrative) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2022 CAD ($) Rate | Dec. 31, 2022 USD ($) Rate | Dec. 31, 2021 CAD ($) Royalties | Dec. 31, 2021 USD ($) Royalties
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Number of royalties acquired | Royalties |  |  | 6 | 6
Investments in royalty, payment |  |  | $ 32.6 | $ 26,000,000
Long term gold price per ounce |  |  |  | $ 700
Marimaca Copper Project [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired | 1.00% | 1.00% |  |
Investments in royalty, payment | $ 20.3 | $ 15,500,000 |  |
Cascabel Copper Gold Project [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired | 0.60% | 0.60% |  |
Investments in royalty, payment | $ 67.2 | $ 50,000,000 |  |
Minimum annual royalty payments |  | $ 4,000,000 |  |
CSA Silver Stream [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired | 100.00% | 100.00% |  |
Description of revised binding agreement | Under the revised CSA Silver Stream agreement, the upfront cash payment payable by Osisko Bermuda to MAC has been reduced from US$90.0 million to US$75.0 million (the "Silver Deposit"). In the event the silver price averages at least US$25.50 per ounce over the ten business days immediately prior to the closing of the transaction, the Silver Deposit will be increased by US$15.0 million to a total of US$90.0 million. | Under the revised CSA Silver Stream agreement, the upfront cash payment payable by Osisko Bermuda to MAC has been reduced from US$90.0 million to US$75.0 million (the "Silver Deposit"). In the event the silver price averages at least US$25.50 per ounce over the ten business days immediately prior to the closing of the transaction, the Silver Deposit will be increased by US$15.0 million to a total of US$90.0 million. |  |
Investments in royalty, payment |  | $ 90,000,000 |  |
Equity of Metals Acquisition Corp |  | 15,000,000 |  |
Potential Backstop Copper Stream [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Payment of up-front cash deposit |  | 75,000,000 |  |
Equity of Metals Acquisition Corp |  | $ 25,000,000 |  |
Potential Backstop Copper Stream [Member] | First Threshold Stream [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired | 3.00% | 3.00% |  |
Potential Backstop Copper Stream [Member] | Second Threshold Stream [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired | Rate | 4.875% | 4.875% |  |
Potential Backstop Copper Stream [Member] | Remaining life of mine [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired | 2.25% | 2.25% |  |
Cariboo Property [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired | 5.00% | 5.00% |  |
San Antonio Property [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired | 15.00% | 15.00% |  |
Description of cash payments | on-going per-ounce cash payments equal to 15% of the applicable spot metal price on the business day immediately preceding the date of delivery of such refined metal | on-going per-ounce cash payments equal to 15% of the applicable spot metal price on the business day immediately preceding the date of delivery of such refined metal |  |
Tintic Property [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Description of cash payments | on-going per-ounce cash payments equal to 25% of the applicable spot metal price on the business day immediately preceding the date of delivery of such refined metal | on-going per-ounce cash payments equal to 25% of the applicable spot metal price on the business day immediately preceding the date of delivery of such refined metal |  |
Tintic Property [Member] | First Threshold Stream [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired | 2.50% | 2.50% |  |
Tintic Property [Member] | Second Threshold Stream [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired | 2.00% | 2.00% |  |
Spring Valley Project [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired |  |  | 0.50% | 0.50%
Number of royalties acquired | Royalties |  |  | 4 | 4
Spring Valley Project [Member] | Minimum [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired |  |  | 2.50% | 2.50%
Spring Valley Project [Member] | Maximum [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired |  |  | 3.00% | 3.00%
Moonlight Exploration Property [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired |  |  | 1.00% | 1.00%
Almaden Project [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired |  |  | 0.50% | 0.50%
Gold and silver offtake right acquired |  |  | 30.00% | 30.00%
Sailfish Royalty Corp.[Member] | Tocantinzinho Gold Project [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Investments in royalty, payment |  |  | $ 12.6 | $ 10,000,000
Royalty interest after buy-down payment option |  |  | 0.75% | 0.75%
Falco Resources Ltd. [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Additional investments in royalty, stream and other interests |  |  | $ 10.0 |
Amount of second installment payment |  |  | $ 20.0 |
Barrick TZ Limited [Member] | AfriOre and Gold Rim [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired |  |  | 2.00% | 2.00%
Investments in royalty, payment |  |  |  | $ 11,800,000
Barrick TZ Limited [Member] | Frontier Project [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired |  |  | 1.00% | 1.00%
Barrick TZ Limited [Member] | Central Hounde Project [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of NSR acquired |  |  | 1.00% | 1.00%
GoGold Resources Inc [Member] |  |  |  |
Royalty, Stream And Other Interests [Line Items] |  |  |  |
Percentage of gold and silver from tailings piles |  |  | 2.40% | 2.40%
Percentage of transfer price of gold and silver spot prices |  |  | 30.00% | 30.00%

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