XML 160 R90.htm IDEA: XBRL DOCUMENT v3.20.1

Significant accounting policies - Disclosure of detailed information about estimated useful life or depreciation rate (Details)	12 Months Ended
	Dec. 31, 2019
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
Exploration equipment and facilities [Member]
Significant Accounting Policies [Line Items]
Useful life of property, plant and equipment	3-20 years
Mining plant and equipment (development) [Member]
Significant Accounting Policies [Line Items]
Useful life of property, plant and equipment	5-20 years

X

- Definition

The useful lives or depreciation rates 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 2018-01-01
-Paragraph 73
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=16&date=2018-03-01&anchor=para_73_c&doctype=Standard
-URIDate 2018-03-16

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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

X

- Details

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

X

- Details

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

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_ExplorationAndEvaluationAssetsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfPropertyPlantAndEquipmentAxis=ifrs-full_MiningPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: