v3.26.1
Risk Management - Credit quality of off balancesheet items (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of credit risk exposure [Line Items]    
Off balance accounts ₩ 150,356,165 ₩ 150,474,850
Payment Guarantees    
Disclosure of credit risk exposure [Line Items]    
Off balance accounts 16,070,098 16,611,262
Loan commitments    
Disclosure of credit risk exposure [Line Items]    
Off balance accounts 134,286,067 133,863,588
Stage 1 | Above appropriate credit rating    
Disclosure of credit risk exposure [Line Items]    
Off balance accounts [1] 142,632,581 143,302,263
Stage 1 | Above appropriate credit rating | Payment Guarantees    
Disclosure of credit risk exposure [Line Items]    
Off balance accounts [1] 15,186,145 15,679,374
Stage 1 | Above appropriate credit rating | Loan commitments    
Disclosure of credit risk exposure [Line Items]    
Off balance accounts [1] 127,446,436 127,622,889
Stage 1 | Less than a limited credit rating    
Disclosure of credit risk exposure [Line Items]    
Off balance accounts [2] 4,597,428 4,210,784
Stage 1 | Less than a limited credit rating | Payment Guarantees    
Disclosure of credit risk exposure [Line Items]    
Off balance accounts [2] 776,039 808,182
Stage 1 | Less than a limited credit rating | Loan commitments    
Disclosure of credit risk exposure [Line Items]    
Off balance accounts [2] 3,821,389 3,402,602
Stage 2 | Above appropriate credit rating    
Disclosure of credit risk exposure [Line Items]    
Off balance accounts [1] 2,479,619 2,339,922
Stage 2 | Above appropriate credit rating | Payment Guarantees    
Disclosure of credit risk exposure [Line Items]    
Off balance accounts [1] 18,603 41,866
Stage 2 | Above appropriate credit rating | Loan commitments    
Disclosure of credit risk exposure [Line Items]    
Off balance accounts [1] 2,461,016 2,298,056
Stage 2 | Less than a limited credit rating    
Disclosure of credit risk exposure [Line Items]    
Off balance accounts [2] 587,900 561,758
Stage 2 | Less than a limited credit rating | Payment Guarantees    
Disclosure of credit risk exposure [Line Items]    
Off balance accounts [2] 66,204 59,688
Stage 2 | Less than a limited credit rating | Loan commitments    
Disclosure of credit risk exposure [Line Items]    
Off balance accounts [2] 521,696 502,070
Stage 3    
Disclosure of credit risk exposure [Line Items]    
Off balance accounts 58,637 60,123
Stage 3 | Payment Guarantees    
Disclosure of credit risk exposure [Line Items]    
Off balance accounts 23,107 22,152
Stage 3 | Loan commitments    
Disclosure of credit risk exposure [Line Items]    
Off balance accounts ₩ 35,530 ₩ 37,971
[1] Credit grade of corporates are AAA ~ BBB, and consumers are grades 1 ~ 6.
[2] Credit grade of corporate are BBB- ~ C, and consumers are grades 7 ~ 10.