v3.26.1
Risk Management - Cash flow from principal and interest payments of nonderivative financial liabilities by remaining contractual maturities (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Financial liabilities at FVTPL ₩ 1,342,691 ₩ 256,683
Deposits due to customers 382,401,255 373,990,681
Borrowings 34,367,457 30,850,033
Debentures 59,707,068 51,817,223
Lease liabilities 617,790 563,389
Other financial liabilities [1] 29,846,233 24,990,015
Investment contract liabilities 3,702,780  
Total 511,985,274 482,468,024
Within 3 months    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Financial liabilities at FVTPL 456,606 74,205
Deposits due to customers 239,003,957 237,078,927
Borrowings 18,209,601 11,589,854
Debentures 7,015,353 4,635,557
Lease liabilities 66,838 60,099
Other financial liabilities [1] 24,614,468 19,417,326
Investment contract liabilities 3,702,780  
Total 293,069,603 272,855,968
4 to 6 months    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Financial liabilities at FVTPL 103,174 0
Deposits due to customers 43,936,717 41,568,072
Borrowings 4,676,557 6,676,926
Debentures 3,594,266 5,525,191
Lease liabilities 55,213 49,069
Other financial liabilities [1] 194,968 108,361
Investment contract liabilities 0  
Total 52,560,895 53,927,619
7 to 9 months    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Financial liabilities at FVTPL 131,181 69,534
Deposits due to customers 31,733,945 33,229,547
Borrowings 3,879,109 4,781,377
Debentures 4,732,824 4,442,376
Lease liabilities 50,236 45,534
Other financial liabilities [1] 35,049 30,995
Investment contract liabilities 0  
Total 40,562,344 42,599,363
10 to 12 months    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Financial liabilities at FVTPL 310,111 112,944
Deposits due to customers 47,843,702 43,680,907
Borrowings 3,202,042 3,676,310
Debentures 4,586,030 3,572,533
Lease liabilities 43,549 40,375
Other financial liabilities [1] 47,917 27,093
Investment contract liabilities 0  
Total 56,033,351 51,110,162
1 to 5 years    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Financial liabilities at FVTPL 324,118 0
Deposits due to customers 18,670,748 16,991,574
Borrowings 3,881,934 3,561,696
Debentures 35,650,614 30,967,974
Lease liabilities 357,379 317,971
Other financial liabilities [1] 1,103,857 1,118,751
Investment contract liabilities 0  
Total 59,988,650 52,957,966
Over 5 years    
Disclosure of maturity analysis for non-derivative financial liabilities [Line Items]    
Financial liabilities at FVTPL 17,501 0
Deposits due to customers 1,212,186 1,441,654
Borrowings 518,214 563,870
Debentures 4,127,981 2,673,592
Lease liabilities 44,575 50,341
Other financial liabilities [1] 3,849,974 4,287,489
Investment contract liabilities 0  
Total ₩ 9,770,431 ₩ 9,016,946
[1] Lease liabilities are not included.