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Other Liabilities (Tables)
 12 Months Ended
Dec. 31, 2025
TextBlock 1 [Abstract]  
Summary of Other Liabilities
Other liabilities as of December 31, 2024 and 2025 are as follows:
 
(in millions of Won)
   
2024
     
  2025  
  
Current
      
Due to customers for contract work
   
￦
 452,839        727,902  
Advances received
      253,171        500,831  
Unearned revenue
      87,969        102,275  
Withholdings
      307,753        209,450  
Firm commitment liability
      10,384        2,910  
Others (*1)
      22,723        30,827  
  
 
 
     
 
 
  
  
￦
 1,134,843        1,574,195  
  
 
 
     
 
 
  
Non-current
      
Advances received
   
￦
 90,084        145,815  
Unearned revenue
      4,317        3,704  
Others (*1)
      90,651        98,294  
  
 
 
     
 
 
  
  
￦
 185,052        247,813  
  
 
 
     
 
 
  
 
(*1)
As of December 31, 2024 and 2025, the Company recognized the assumed liability amounting to
￦
41,770 million and
￦
43,850 million, respectively, related to unfavorable terms of a customer contract relative to market-terms upon the acquisition of Senex Energy Limited by Senex Holdings PTY LTD, a subsidiary.