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Cover - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2024
Feb. 03, 2025
Jun. 28, 2024
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-13357    
Entity Registrant Name Royal Gold, Inc    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 84-0835164    
Entity Address, Address Line One 1144 15th Street    
Entity Address, Address Line Two Suite 2500    
Entity Address, City or Town Denver    
Entity Address, State or Province CO    
Entity Address, Postal Zip Code 80202    
City Area Code 303    
Local Phone Number 573-1660    
Title of 12(b) Security Common Stock, $0.01 par value    
Trading Symbol RGLD    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 8.2
Entity Common Stock, Shares Outstanding   65,758,616  
Documents Incorporated by Reference [Text Block]
DOCUMENTS INCORPORATED BY REFERENCE
Certain information required by Items 10, 11, 12, 13, and 14 of Part III of Form 10-K is incorporated by reference from portions of Royal Gold’s definitive proxy statement relating to its 2025 annual meeting of stockholders to be filed within 120 days after December 31, 2024. 		   
Amendment Flag false    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000085535