v3.26.1
Share-based payment Arrangement - Summary of Terms and Conditions Related to Grants of Share Based Payment Arrangement (Detail) - 12 months ended Dec. 31, 2025
shares
₩ / shares
$ / shares
Series 5 [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Grant date March 26, 2020  
Types of shares to be issued Registered common shares of the Parent Company  
Grant method Reissue of treasury shares, Cash settlement  
Number of shares | shares 32,947  
Exercise price | ₩ / shares ₩ 38,452  
Exercise period Mar. 27, 2023 ~ Mar. 26, 2027  
Vesting conditions 3 years’ service from the grant date  
Series 6 [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Grant date March 25, 2021  
Types of shares to be issued Registered common shares of the Parent Company  
Grant method Reissue of treasury shares, Cash settlement  
Number of shares | shares 71,726  
Exercise price | ₩ / shares ₩ 50,276  
Exercise period Mar. 26, 2023 ~ Mar. 25, 2026  
Vesting conditions 2 years’ service from the grant date  
Series 7-1 [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Types of shares to be issued Registered common shares of the Parent Company  
Grant method Reissue of treasury shares, Cash settlement  
Number of shares | shares 98,425  
Exercise price | ₩ / shares ₩ 56,860  
Exercise period Mar. 26, 2025 ~ Mar. 25, 2029  
Vesting conditions 2 years’ service from the grant date  
Series 7-2 [member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Grant date March 25, 2022  
Types of shares to be issued Registered common shares of the Parent Company  
Grant method Reissue of treasury shares, Cash settlement  
Number of shares 96,820  
Exercise price | $ / shares   $ 56,860
Exercise period Mar. 26, 2024 ~ Mar. 25, 2027  
Vesting conditions 2 years’ service from the grant date  
PSU of SK Telecom Co., Ltd. [member] | Equity Settled Share Based Payment Arrangement Two [Member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Grant date March 26, 2024  
Grant method Reissue of treasury shares  
Reference share price | $ / shares   52,720
Reference index 362  
PSU of SK Telecom Co., Ltd. [member] | Equity Settled Share Based Payment Arrangement One [Member]    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Grant date March 28, 2023  
Types of shares to be issued Registered common shares of the Parent Company  
Number of shares Fluctuates according to the share price on the expiration date and the cumulative increase rate of KOSPI200  
Reference share price | $ / shares   $ 47,280
Reference index 315  
Maturity (exercise date) The day in which the annual general meeting of shareholders is held after 3 years from the grant date  
Vesting conditions Full service in the year in which the grant date is included