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Cover - shares
 12 Months Ended
Dec. 31, 2021
Jul. 08, 2022
Cover [Abstract]    
Document Type 10-K/A  
Document Annual Report true  
Document Period End Date Dec. 31, 2021  
Current Fiscal Year End Date --12-31  
Document Transition Report false  
Entity File Number 001-35455  
Entity Registrant Name SSR MINING INC.  
Entity Incorporation, State or Country Code A1  
Entity Tax Identification Number 98-0211014  
Entity Address, Address Line One 6900 E Layton Ave.  
Entity Address, Address Line Two Suite 1300  
Entity Address, City or Town Denver  
Entity Address, State or Province CO  
Entity Address, Postal Zip Code 80237  
City Area Code 303  
Local Phone Number 292-1299  
Title of 12(b) Security Common shares without par value  
Trading Symbol SSRM  
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  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   211,841,990
Entity Central Index Key 0000921638  
Amendment Flag true  
Amendment Description This Amendment is being filed solely to reorganize information included in Part I, Item 2. Properties in the Initial Form 10-K Filing and to include additional information in Part I, Item 2. Properties that was previously included in the Çöpler District Master Plan 2021 Technical Report Summary, the Marigold 2021 Technical Report Summary, the Seabee 2021 Technical Report Summary and the Puna 2021 Technical Report Summary (collectively, the “Technical Report Summaries”), which were filed as exhibits to the Initial Form 10-K Filing.  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus FY