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Trade Accounts and Notes Receivable (Tables)
12 Months Ended
Dec. 31, 2025
Trade accounts and notes receivables, net [member]  
Statements [Line Items]  
Summary of Financial Assets
Trade accounts and notes receivable as of December 31, 2024 and 2025 are as follows:
 
(in millions of Won)
  
2024
    
2025
 
Current
     
Trade accounts and notes receivable
  
 9,654,809         10,133,140  
Due from customers for contract work
     1,488,180        1,580,558  
Less: Allowance for doubtful accounts
     (321,501 )
 
     (529,724 )
 
  
 
 
    
 
 
 
  
 10,821,488         11,183,974  
  
 
 
    
 
 
 
Non-current
     
Trade accounts and notes receivable
  
72,387        64,902  
Less: Allowance for doubtful accounts
     (44,608 )      (45,194 )
  
 
 
    
 
 
 
  
27,779        19,708