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v3.23.1

Significant accounting policies - Disclosure of detailed information about estimated useful life or depreciation rate (Details) | 12 Months Ended
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Dec. 31, 2022
Leasehold improvements [Member] |
Significant Accounting Policies [Line Items] |
Useful life of property, plant and equipment | Lease term
Furniture and office equipment [Member] |
Significant Accounting Policies [Line Items] |
Useful life of property, plant and equipment | 3-5 years
Right-of-use assets [Member] |
Significant Accounting Policies [Line Items] |
Useful life of property, plant and equipment | Shorter of useful life and lease term

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- Definition The depreciation method used for property, plant and equipment. [Refer: Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2022-03-24 -Paragraph 73 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2022-en-r&anchor=para_73_b&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_DepreciationMethodPropertyPlantAndEquipment
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | or_SignificantAccountingPoliciesLineItems
Namespace Prefix: | or_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_LeaseholdImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_OfficeEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_RightofuseAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |