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Finance Income and Costs (Tables)
12 Months Ended
Dec. 31, 2025
TextBlock 1 [Abstract]  
Details of Finance Income and Expense
Details of finance income and costs for the years ended December 31, 2023, 2024 and 2025 were as follows:
 
(in millions of Won)
  
2023
    
2024
    
2025
 
Finance income
        
Interest income
  
502,147        576,782        533,307  
Dividend income
     50,146        76,947        38,056  
Gain on foreign currency transactions
     1,660,713        1,419,887        1,339,770  
Gain on foreign currency translations
     292,581        1,187,507        722,904  
Gain on derivatives transactions
     333,197        437,999        298,505  
Gain on valuations of derivatives
     201,133        898,586        149,211  
Gain on disposals of financial assets at fair value through profit of loss
     203,795        164,556        58,487  
Gain on valuations of financial assets at fair value through profit or loss
     572,154        201,059        74,295  
Gain on valuations of financial liabilities at fair value through profit or loss
     —         239,120        —   
Others
     14,880        9,152        7,602  
  
 
 
    
 
 
    
 
 
 
  
3,830,746        5,211,595        3,222,137  
  
 
 
    
 
 
    
 
 
 
 
 
(in millions of Won)
  
2023
    
2024
    
2025
 
Finance costs
        
Interest expenses
  
(1,001,290      (1,051,511      (1,091,462
Loss on foreign currency transactions
     (1,595,430      (1,448,214      (1,354,094)  
Loss on foreign currency translations
     (705,866      (1,900,405      (707,838
Loss on derivatives transactions
     (320,374      (317,913      (435,463
Loss on valuations of derivatives
     (77,459      (108,625      (69,366
Loss on disposals of trade accounts and notes receivable
     (84,649      (82,615      (73,431
Loss on disposals of financial assets at fair value through profit or loss
     (13,264      (27,857      (7,134
Loss on valuations of financial assets at fair value through profit or loss
     (51,270      (80,515      (131,502
Loss on valuations of financial liabilities at fair value through profit or loss
     (305,562      —         (1,310
Others
     (47,832      (63,080      (38,682
  
 
 
    
 
 
    
 
 
 
  
(4,202,996      (5,080,735      (3,910,282