Adjusted Ratio of Debt to Earnings before Interest, Taxes, Depreciation and Amortization, Minimum

No definition available.

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

- Definition

Asset Acquisition, Cash Purchase Price, Percentage of Spot Price, Gold

+ References

No definition available.

+ Details

Name:	rgld_AssetAcquisitionCashPurchasePricePercentageOfSpotPriceGold
Namespace Prefix:	rgld_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Asset Acquisition, Gold Deliverable, Threshold Period

+ References

No definition available.

+ Details

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

- Definition

Asset Acquisition, Gold Deliverable, Value

+ References

No definition available.

+ Details

Name:	rgld_AssetAcquisitionGoldDeliverableValue
Namespace Prefix:	rgld_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Asset Acquisition, Gold Delivered, Ounce

+ References

No definition available.

+ Details

Name:	rgld_AssetAcquisitionGoldDeliveredOunce
Namespace Prefix:	rgld_
Data Type:	dtr-types:massItemType
Balance Type:	na
Period Type:	instant

- Definition

Asset Acquisition, Gold Option, Exercisable Period

+ References

No definition available.

+ Details

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

- Definition

Asset Acquisition, Ounces Of Gold Delivered Per Million Pounds Of Copper Recovered

+ References

No definition available.

+ Details

Name:	rgld_AssetAcquisitionOuncesOfGoldDeliveredPerMillionPoundsOfCopperRecovered
Namespace Prefix:	rgld_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Asset Acquisition, Reduction In Stream Rate And Delivery Thresholds, Percentage

+ References

No definition available.

+ Details

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

- Definition

Business Combination, Consideration transferred, Cash Paid Per Acquiree Share

+ References

No definition available.

+ Details

Name:	rgld_BusinessCombinationConsiderationTransferredCashPaidPerAcquireeShare
Namespace Prefix:	rgld_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Business Combination, Consideration Transferred, Equity Issued Per Acquiree Share

+ References

No definition available.

+ Details

Name:	rgld_BusinessCombinationConsiderationTransferredEquityIssuedPerAcquireeShare
Namespace Prefix:	rgld_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Ownership Interest Held By Parent, Percentage

+ References

No definition available.

+ Details

Name:	rgld_OwnershipInterestHeldByParentPercentage
Namespace Prefix:	rgld_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of consideration transferred in asset acquisition. Includes, but is not limited to, cash, liability incurred by acquirer, and equity interest issued by acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 55
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479908/805-50-55-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 25
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480060/805-50-25-1

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 30
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480027/805-50-30-1

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 805
-SubTopic 50
-Name Accounting Standards Codification
-Section 30
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480027/805-50-30-2

+ Details

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

- Definition

Percentage of voting equity interest acquired in business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479328/805-10-50-8

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 38
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479303/805-10-55-38

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479328/805-10-50-2

+ Details

Name:	us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479328/805-10-50-8

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 41
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479303/805-10-55-41

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479581/805-30-50-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479581/805-30-50-1

+ Details

Name:	us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(f))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

+ Details

Name:	us-gaap_ProceedsFromLinesOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483399/855-10-50-2

+ Details

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

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=rgld_KansanshiMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=rgld_SubsidiaryOfFirstQuantumMineralsLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=rgld_CreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	rgld_PreciousMetalsAgreementTermsAxis=rgld_ProductionThresholdOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	rgld_PreciousMetalsAgreementTermsAxis=rgld_ProductionThresholdTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	rgld_PreciousMetalsAgreementTermsAxis=rgld_ProductionThresholdThreeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	rgld_PreciousMetalsAgreementTermsAxis=rgld_AccelerationOption1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	rgld_PreciousMetalsAgreementTermsAxis=rgld_AccelerationOption2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=rgld_SandstormGoldLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=rgld_HorizonCopperCorp.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SUBSEQUENT EVENTS (Details) $ in Millions		3 Months Ended
SUBSEQUENT EVENTS (Details) $ in Millions	Aug. 05, 2025 USD ($) oz	Dec. 31, 2025 USD ($)	Dec. 31, 2025 $ / shares
Subsequent Event \| Kansanshi \| Subsidiary Of First Quantum Minerals Ltd
Subsequent Event [Line Items]
Ownership interest held by parent, percentage	0.80
Subsequent Event \| Revolving Credit Facility \| Credit Facility \| Line of Credit
Subsequent Event [Line Items]
Proceeds from lines of credit \| $	$ 825
Subsequent Event \| Kansanshi Gold Stream Acquisition
Subsequent Event [Line Items]
Asset acquisition, consideration transferred \| $	$ 1,000
Subsequent Event \| Kansanshi Gold Stream Acquisition \| Production Threshold One
Subsequent Event [Line Items]
Asset acquisition, number of gold produced per million, pounds of recovered copper \| oz	75
Asset acquisition, gold delivered, weight \| oz	425,000
Subsequent Event \| Kansanshi Gold Stream Acquisition \| Production Threshold Two
Subsequent Event [Line Items]
Asset acquisition, number of gold produced per million, pounds of recovered copper \| oz	55
Subsequent Event \| Kansanshi Gold Stream Acquisition \| Production Threshold Three
Subsequent Event [Line Items]
Asset acquisition, number of gold produced per million, pounds of recovered copper \| oz	45
Subsequent Event \| Kansanshi Gold Stream Acquisition \| Acceleration Option 1
Subsequent Event [Line Items]
Adjusted ratio of debt to earnings before interest, taxes, depreciation and amortization	2.25
Asset acquisition, gold option, exercisable period	1 year
Asset acquisition, gold deliverable, value \| $	$ 200
Asset acquisition, gold deliverable, threshold period	14 months
Asset acquisition, reduction in stream rate and delivery thresholds, percentage	20.00%
Asset acquisition, cash purchase price, percentage of spot price, gold	20.00%
Subsequent Event \| Kansanshi Gold Stream Acquisition \| Acceleration Option 2
Subsequent Event [Line Items]
Adjusted ratio of debt to earnings before interest, taxes, depreciation and amortization	1.25
Asset acquisition, gold option, exercisable period	1 year
Asset acquisition, gold deliverable, value \| $	$ 100
Asset acquisition, gold deliverable, threshold period	7 months
Asset acquisition, reduction in stream rate and delivery thresholds, percentage	10.00%
Asset acquisition, cash purchase price, percentage of spot price, gold	35.00%
Subsequent Event \| Kansanshi Gold Stream Acquisition \| Minimum \| Production Threshold Two
Subsequent Event [Line Items]
Asset acquisition, gold delivered, weight \| oz	425,001
Subsequent Event \| Kansanshi Gold Stream Acquisition \| Maximum \| Production Threshold Two
Subsequent Event [Line Items]
Asset acquisition, gold delivered, weight \| oz	650,000
Sandstorm Gold Ltd \| Forecast
Subsequent Event [Line Items]
Business combination, equity interest acquired, percentage			100.00%
Business combination, consideration transferred, equity issued per acquiree share			0.0625
Transaction equity value \| $		$ 3,500
Horizon Copper \| Forecast
Subsequent Event [Line Items]
Business combination, equity interest acquired, percentage			100.00%
Transaction equity value \| $		$ 196
Business combination, consideration transferred, cash paid per acquiree share (in dollars per share) \| $ / shares			$ 2.00