v3.26.1
Loans and other financial assets at amortized cost - Details of due from banks (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2025
Dec. 31, 2024
Cash and cash equivalents [Line Items]    
Total ₩ 2,674,644 ₩ 2,630,604
Due from banks in local currency    
Cash and cash equivalents [Line Items]    
Total 1,155,760 512,050
Due from banks in local currency | Allowance for credit losses    
Cash and cash equivalents [Line Items]    
Total (408) (4)
Due from banks in local currency | Due from the depository banks | Gross carrying amount    
Cash and cash equivalents [Line Items]    
Total 531,542 200,366
Due from banks in local currency | Due from non-depository institutions | Gross carrying amount    
Cash and cash equivalents [Line Items]    
Total 20,624 152
Due from banks in local currency | Due from the Korea Exchange | Gross carrying amount    
Cash and cash equivalents [Line Items]    
Total 196,557 239,222
Due from banks in local currency | Others | Gross carrying amount    
Cash and cash equivalents [Line Items]    
Total 407,445 72,314
Due from banks in foreign currencies    
Cash and cash equivalents [Line Items]    
Total 1,518,884 2,118,554
Due from banks in foreign currencies | Allowance for credit losses    
Cash and cash equivalents [Line Items]    
Total (4,272) (6,323)
Due from banks in foreign currencies | Due from banks on demand | Gross carrying amount    
Cash and cash equivalents [Line Items]    
Total 149,839 177,886
Due from banks in foreign currencies | Due from banks on time | Gross carrying amount    
Cash and cash equivalents [Line Items]    
Total 276,498 193,654
Due from banks in foreign currencies | Others | Gross carrying amount    
Cash and cash equivalents [Line Items]    
Total ₩ 1,096,819 ₩ 1,753,337