v3.26.1
Cover Page
 12 Months Ended
Dec. 31, 2025
shares
Document Information [Line Items]  
Document Type 20-F
Amendment Flag false
Document Period End Date Dec. 31, 2025
Document Fiscal Year Focus 2025
Document Fiscal Period Focus FY
Entity Registrant Name SK Telecom Co., Ltd.
Entity Central Index Key 0001015650
Current Fiscal Year End Date --12-31
Entity Well-known Seasoned Issuer Yes
Entity Current Reporting Status Yes
Entity Filer Category Large Accelerated Filer
Entity Shell Company false
Entity Emerging Growth Company false
Entity Common Stock, Shares Outstanding 212,982,275
Entity File Number 1-14418
Entity Voluntary Filers No
Entity Interactive Data Current Yes
Entity Address, Country KR
Entity Address, Address Line One 65, Eulji-ro
Document Annual Report true
Document Transition Report false
Document Shell Company Report false
ICFR Auditor Attestation Flag true
Document Registration Statement false
Entity Address, City or Town Jung-gu
Entity Address, Postal Zip Code 04539
Entity Incorporation, State or Country Code M5
Document Accounting Standard International Financial Reporting Standards
Auditor Name KPMG Samjong Accounting Corp.
Auditor Firm ID 1357
Auditor Location Seoul, Korea
Document Financial Statement Error Correction [Flag] false
Business Contact [Member]  
Document Information [Line Items]  
Entity Address, Country KR
Entity Address, Address Line One 65, Eulji-ro
Entity Address, City or Town Jung-gu
Entity Address, Postal Zip Code 04539
Contact Personnel Name Mr. Chang-Gyu Kim
Contact Personnel Fax Number 82-2-6100-7830
Local Phone Number 6100-1532
City Area Code 82-2
ADS [Member]  
Document Information [Line Items]  
Trading Symbol SKM
Title of 12(b) Security American Depositary Shares
Security Exchange Name NYSE
Common Stock [Member]  
Document Information [Line Items]  
Trading Symbol SKM
Title of 12(b) Security Common Stock
Security Exchange Name NYSE