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Financial Assets at Fair Value Through Profit or Loss - Summary of Income (Loss) from Financial Assets at fair Value Through Profit or Loss (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Financial Assets At Fair Value Through Profit Or Loss [Line Items]    
Gains (losses) on financial assets at fair value through profit or loss ₩ 173,417 ₩ 211,131
Financial assets at fair value through profit or loss | Beneficiary certificate    
Financial Assets At Fair Value Through Profit Or Loss [Line Items]    
Gains (losses) on financial assets at fair value through profit or loss 34,481 (59)
Financial assets at fair value through profit or loss | Cooperative    
Financial Assets At Fair Value Through Profit Or Loss [Line Items]    
Gains (losses) on financial assets at fair value through profit or loss 118 272
Financial assets at fair value through profit or loss | Debt with embedded derivatives    
Financial Assets At Fair Value Through Profit Or Loss [Line Items]    
Gains (losses) on financial assets at fair value through profit or loss 2,435 2,934
Financial assets at fair value through profit or loss | Others    
Financial Assets At Fair Value Through Profit Or Loss [Line Items]    
Gains (losses) on financial assets at fair value through profit or loss ₩ 136,383 ₩ 207,984