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Loans at amortized cost, etc. (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Loans at amortized cost [Abstract]      
Retail loans ₩ 173,568,321 ₩ 166,140,123  
Corporate loans [1] 259,593,754 251,011,516  
Public and other loans 4,845,465 5,253,071  
Loans between banks 1,691,536 1,946,442  
Credit card receivables 28,653,978 28,894,371  
Loans at amortized cost, Gross, Total 468,353,054 453,245,523  
Discount (26,251) (29,923)  
Deferred loan origination costs 727,749 645,569 ₩ 505,986
Loans at amortized cost before Allowance for credit losses, Total 469,054,552 453,861,169  
Less: Allowance for credit loss (4,280,672) (4,565,931)  
Loans at amortized cost, Net, Total ₩ 464,773,880 ₩ 449,295,238  
[1] Includes SOHO loans.