Percentage of royalty interest that acquiree can purchase under the cooperation agreement.

No definition available.

Name:	rgld_CoOperationAgreementOptionToPurchaseRoyaltyInterestPercentage
Namespace Prefix:	rgld_
Data Type:	dtr-types:percentItemType
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Period Type:	duration

- Definition

Threshold period for acquiree to purchase royalty interest after the transaction closing date.

+ References

No definition available.

+ Details

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Namespace Prefix:	rgld_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents percentage of net smelter return.

+ References

No definition available.

+ Details

Name:	rgld_PercentageOfNetSmelterReturn
Namespace Prefix:	rgld_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of purchase price equal to option to purchase royalty interest.

+ References

No definition available.

+ Details

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Namespace Prefix:	rgld_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the area of interest surrounding the presently owned mine, as well as any other mining concessions presently owned or acquired.

+ References

No definition available.

+ Details

Name:	rgld_RoyaltyAgreementMiningConcessionsAreaOfInterestRange
Namespace Prefix:	rgld_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_AssetAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow from the acquisition of a mineral right which is the right to extract a mineral from the earth or to receive payment, in the form of royalty, for the extraction of minerals.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3213-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_AssetAcquisitionAxis=rgld_GreatBearRoyaltyAcquisitionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=rgld_KinrossMember
Namespace Prefix:
Data Type:	na
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Period Type:

ACQUISITIONS - Great Bear (Details) $ in Thousands, $ in Millions			9 Months Ended
	Sep. 09, 2022 USD ($) area	Sep. 09, 2022 CAD ($) area	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)
Acquisitions
Acquisition consideration paid \| $			$ 715,829	$ 384,315
GBR
Acquisitions
Acquisition consideration paid	$ 151,679	$ 199.6
Net smelter return (NSR) (as a percent)	2.00%	2.00%
Area of mining \| area	9,140	9,140
Option to purchase royalty interest (as a percent)	25.00%	25.00%
Option purchase price based on original price (as a percent)	25.00%	25.00%
Threshold period for option purchase	10 years	10 years
GBR \| Kinross
Acquisitions
Net smelter return (NSR) (as a percent)	0.50%	0.50%