v3.25.2

Segment disclosure (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2025
Disclosure of operating segments [Abstract] |
Disclosure of detailed information about geographic revenues segment reporting [Table Text Block] |
|  | North America (i) |  |  | South America |  |  | Australia |  |  | Africa |  |  | Europe |  |  | Total |
|  | $ |  |  | $ |  |  | $ |  |  | $ |  |  | $ |  |  | $ |
2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalties |  | 165,738 |  |  | 5,765 |  |  | 347 |  |  | 5,414 |  |  | - |  |  | 177,264 |
Streams |  | 11,883 |  |  | 45,831 |  |  | 27,029 |  |  | - |  |  | 15,363 |  |  | 100,106 |
|  | 177,621 |  |  | 51,596 |  |  | 27,376 |  |  | 5,414 |  |  | 15,363 |  |  | 277,370 |
2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalties |  | 126,101 |  |  | 1,338 |  |  | 240 |  |  | 2,696 |  |  | - |  |  | 130,375 |
Streams |  | 8,204 |  |  | 22,371 |  |  | 19,808 |  |  | - |  |  | 10,399 |  |  | 60,782 |
|  | 134,305 |  |  | 23,709 |  |  | 20,048 |  |  | 2,696 |  |  | 10,399 |  |  | 191,157 |
Disclosure of detailed information about geographic net assets [Table Text Block] |
|  | North America (i) |  |  | South America |  |  | Australia |  |  | Africa |  |  | Asia |  |  | Europe |  |  | Total |
$ |  | $ |  |  | $ |  |  | $ |  |  | $ |  |  | $ |  |  | $ |
December 31, 2025 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalties |  | 404,599 |  |  | 131,823 |  |  | 58,078 |  |  | 48,841 |  |  | 5,248 |  |  | 10,847 |  |  | 659,436 |
Streams |  | 161,176 |  |  | 128,907 |  |  | 127,252 |  |  | - |  |  | 22,300 |  |  | 30,184 |  |  | 469,819 |
Offtakes |  | - |  |  | - |  |  | 7,067 |  |  | - |  |  | 3,704 |  |  | - |  |  | 10,771 |
|  | 565,775 |  |  | 260,730 |  |  | 192,397 |  |  | 48,841 |  |  | 31,252 |  |  | 41,031 |  |  | 1,140,026 |
December 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Royalties |  | 392,520 |  |  | 127,008 |  |  | 57,646 |  |  | 49,906 |  |  | - |  |  | 10,333 |  |  | 637,413 |
Streams |  | 146,408 |  |  | 127,974 |  |  | 136,386 |  |  | - |  |  | 22,300 |  |  | 32,603 |  |  | 465,671 |
Offtakes |  | - |  |  | - |  |  | 7,067 |  |  | - |  |  | 3,704 |  |  | - |  |  | 10,771 |
|  | 538,928 |  |  | 254,982 |  |  | 201,099 |  |  | 49,906 |  |  | 26,004 |  |  | 42,936 |  |  | 1,113,855 |

X
- References No definition available. + Details
Name: | ifrs-full_DisclosureOfOperatingSegmentsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of detailed information about geographical areas segment reporting explanatory [Table Text Block] + References No definition available. + Details
Name: | or_DisclosureOfDetailedInformationAboutGeographicalAreasSegmentReportingExplanatory
Namespace Prefix: | or_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of detailed information about the royalty, stream and other interests + References No definition available. + Details
Name: | or_DislcosureOfDetailedInformationAboutRoyaltyStreamAndOtherInterestsExplanatory
Namespace Prefix: | or_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration