v3.26.1
Assets subject to lien and assets acquired through foreclosures - Assets subjected to lien (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Assets pledged as collateral [Line Items]    
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 38,225,548 ₩ 25,855,966
Korean treasury and government bonds, etc    
Assets pledged as collateral [Line Items]    
Collateral given to Korea Securities Depository, etc. Shinhan Bank, etc.
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 1,935,048 ₩ 1,271,304
Reason for collateral Related to bonds sold under repurchase agreements Related to bonds sold under repurchase agreements [1]
Korean treasury and government bonds, etc    
Assets pledged as collateral [Line Items]    
Collateral given to Korea Securities Depository, etc. Korea Securities Depository
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 656,478 ₩ 240,005
Reason for collateral Securities borrowing collateral Securities borrowing collateral
Korean treasury and government bonds, etc    
Assets pledged as collateral [Line Items]    
Collateral given to The BOK, etc. SHINHAN SECURITIES CO, etc.
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 1,814,134 ₩ 11,134
Reason for collateral Settlement risk, etc. Future trading collateral
Korean treasury and government bonds, etc    
Assets pledged as collateral [Line Items]    
Collateral given to SHINHAN SECURITIES CO, etc.  
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 24,454  
Reason for collateral Future trading collateral  
Korean treasury and government bonds, etc    
Assets pledged as collateral [Line Items]    
Collateral given to NEXT SECURITIES (Futures), etc.  
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 36,743  
Reason for collateral Collateral for derivative contracts, etc.  
Korean financial institutions' debt securities, etc    
Assets pledged as collateral [Line Items]    
Collateral given to ING BANK, etc. DBS BANK LTD, SEL, etc.
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 587,591 ₩ 698,231
Reason for collateral Variable margin deposit for CSA, etc. Variable margin deposit for CSA, etc.
Korean capital contributions, etc    
Assets pledged as collateral [Line Items]    
Collateral given to Korea Software Financial Cooperative, etc. Korea Software Financial Cooperative
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 9,279 ₩ 109
Reason for collateral Bid guarantee Bid guarantee, etc.
Due from banks in local currency    
Assets pledged as collateral [Line Items]    
Collateral given to KB SECURITIES  
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 1,024  
Reason for collateral Equity-related derivatives, etc.  
Korean treasury and government bonds, etc.    
Assets pledged as collateral [Line Items]    
Collateral given to The BOK, etc. Industrial Bank of Korea
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 3,974,635 ₩ 10,115
Reason for collateral Related to bonds sold under repurchase agreements Related to bonds sold under repurchase agreements [1]
Korean financial institutions' debt securities, etc    
Assets pledged as collateral [Line Items]    
Collateral given to The BOK, etc. CITIBANK LONDON, etc.
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 927,890 ₩ 74,143
Reason for collateral Related to bonds sold under repurchase agreements Related to bonds sold under repurchase agreements [1]
Korean treasury and government bonds, etc.    
Assets pledged as collateral [Line Items]    
Collateral given to The BOK, etc.  
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 362,317  
Reason for collateral Settlement risk, etc.  
Korean financial institutions' debt securities, etc    
Assets pledged as collateral [Line Items]    
Collateral given to The BOK, etc. The BOK, etc.
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 9,283,095 ₩ 8,863,286
Reason for collateral Settlement risk, etc. Settlement risk, etc.
Korean treasury and government bonds, etc.    
Assets pledged as collateral [Line Items]    
Collateral given to Korea Securities Finance Corporation  
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 20,117  
Reason for collateral Securities borrowing collateral  
Korean treasury and government bonds, etc.    
Assets pledged as collateral [Line Items]    
Collateral given to Industrial Bank of Korea etc.  
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 1,137,895  
Reason for collateral Collateral for derivative contracts, etc.  
Foreign currency debt securities    
Assets pledged as collateral [Line Items]    
Collateral given to CCIL Exchange  
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 150,656  
Reason for collateral Related to bonds sold under repurchase agreements  
Foreign currency debt securities    
Assets pledged as collateral [Line Items]    
Collateral given to SOCIETE GENERALE  
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 386,609  
Reason for collateral Variable margin deposit for CSA, etc.  
Foreign currency debt securities    
Assets pledged as collateral [Line Items]    
Collateral given to RJF  
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 93,681  
Reason for collateral Related to the borrowing limit  
Korean treasury and government bonds, etc.    
Assets pledged as collateral [Line Items]    
Collateral given to The BOK, etc. The BOK, etc.
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 9,100,505 ₩ 11,526,197
Reason for collateral Settlement risk, etc. Settlement risk, etc.
Debt securities in foreign currencies    
Assets pledged as collateral [Line Items]    
Collateral given to   Central Bank of Brazil, etc.
Financial assets pledged as collateral for liabilities or contingent liabilities   ₩ 164,136
Reason for collateral [1]   Related to bonds sold under repurchase agreements
Debt securities in foreign currencies    
Assets pledged as collateral [Line Items]    
Collateral given to   RJF
Financial assets pledged as collateral for liabilities or contingent liabilities   ₩ 110,530
Reason for collateral   Related to the borrowing limit
Debt securities in foreign currencies    
Assets pledged as collateral [Line Items]    
Collateral given to   SOCIETE GENERALE, PAR, etc.
Financial assets pledged as collateral for liabilities or contingent liabilities   ₩ 358,781
Reason for collateral   Variable margin deposit for CSA, etc.
Debt securities in foreign currencies    
Assets pledged as collateral [Line Items]    
Collateral given to   NATIXIS
Financial assets pledged as collateral for liabilities or contingent liabilities   ₩ 41,442
Reason for collateral [1]   Related to bonds sold under repurchase agreements
Debt securities in foreign currencies    
Assets pledged as collateral [Line Items]    
Collateral given to   RJF, etc.
Financial assets pledged as collateral for liabilities or contingent liabilities   ₩ 34,508
Reason for collateral   Related to the borrowing limit
Korean financial institutions' debt securities, etc.    
Assets pledged as collateral [Line Items]    
Collateral given to The BOK, etc.  
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 5,098,911  
Reason for collateral Settlement risk, etc.  
Foreign currency debt securities    
Assets pledged as collateral [Line Items]    
Collateral given to NATIXIS  
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 12,145  
Reason for collateral Related to bonds sold under repurchase agreements  
Foreign currency debt securities    
Assets pledged as collateral [Line Items]    
Collateral given to RJF, etc.  
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 30,441  
Reason for collateral Related to the borrowing limit  
Due from banks in local currency    
Assets pledged as collateral [Line Items]    
Collateral given to KEB Hana Bank Co., Ltd., etc. KEB Hana Bank Co., Ltd., etc.
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 40,431 ₩ 6,431
Reason for collateral Collateral for difference settlement Collateral for difference settlement
Due from banks in local currency    
Assets pledged as collateral [Line Items]    
Collateral given to Shinhan Life Insurance Co., Ltd.  
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 30  
Reason for collateral Related to refund liabilities for insurance contract commissions  
Other due from banks in local currency    
Assets pledged as collateral [Line Items]    
Collateral given to MetLife Insurance Co., Ltd. Korea Exchange Co.,Ltd.
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 25 ₩ 3
Reason for collateral Related to refund liabilities for insurance contract commissions Korean Won CCP margin
Other due from banks in local currency    
Assets pledged as collateral [Line Items]    
Collateral given to Korea Exchange Co., Ltd.  
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 3,362  
Reason for collateral Korean Won CCP margin  
Other due from banks in local currency    
Assets pledged as collateral [Line Items]    
Collateral given to MSBI LIMITED Seoul  
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 12,634  
Reason for collateral Variable margin deposit for CSA, etc  
Other due from banks in foreign currency    
Assets pledged as collateral [Line Items]    
Collateral given to GOLDMAN SACHS INTL, etc. BNP-PARIBAS, PAR, etc.
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 353,030 ₩ 647,782
Reason for collateral Variable margin deposit for CSA, etc Variable margin deposit for CSA, etc.
Mortgage loan    
Assets pledged as collateral [Line Items]    
Collateral given to Public offering Public offering
Financial assets pledged as collateral for liabilities or contingent liabilities ₩ 2,067,313 ₩ 1,790,810
Reason for collateral Related to covered bonds Related to covered bonds
Premises and equipment    
Assets pledged as collateral [Line Items]    
Collateral given to Gakorea Co., Ltd., etc. Gakorea Co., Ltd , etc.
Property, plant and equipment, pledged as security ₩ 1,808 ₩ 1,808
Reason for collateral Right to collateral and others Right to collateral and others [2]
Investment properties    
Assets pledged as collateral [Line Items]    
Collateral given to Gakorea Co., Ltd., etc. Gakorea Co., Ltd.
Property, plant and equipment, pledged as security ₩ 103,267 ₩ 5,211
Reason for collateral Right to collateral Right to collateral [2]
[1] The Group has the agreements to repurchase the sold assets at the predetermined price or the price that includes the rate of return and to provide the guarantee on the assets. The transferee has the right to sell or to provide as guarantee. Therefore, the Group does not derecognize the assets, but recognizes the relevant amounts as liability (bonds sold under repurchase agreements). The asset is equivalent to a mortgage-backed debt security.
[2] The maximum pledge amount is 339 million Won.