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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, 2023
Dec. 31, 2022
Financial Assets At Fair Value Through Profit Or Loss [Line Items]    
Gains (losses) on financial assets at fair value through profit or loss ₩ 211,131 ₩ 32,661
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 (59) 4,527
Financial assets at fair value through profit or loss | Cooperative securities    
Financial Assets At Fair Value Through Profit Or Loss [Line Items]    
Gains (losses) on financial assets at fair value through profit or loss 272 120
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 2,934 946
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 ₩ 207,984 ₩ 27,068