v3.26.1
Risk Management - Cash flow from principal and interest payments of nonderivative financial liabilities by expected maturities (Details) - KRW (₩)
₩ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of maturity analysis for derivative financial liabilities by estimated redemption or withdrawal [Line Items]    
Financial liabilities at FVTPL ₩ 1,339,901 ₩ 256,683
Deposits due to customers 381,944,148 373,377,659
Borrowings 34,367,457 30,850,033
Debentures 59,375,865 51,817,223
Lease liabilities 621,498 571,206
Other financial liabilities [1] 29,846,233 24,990,015
Investment contract liabilities 3,702,780  
Total 511,197,882 481,862,819
Within 3 months    
Disclosure of maturity analysis for derivative financial liabilities by estimated redemption or withdrawal [Line Items]    
Financial liabilities at FVTPL 465,982 74,205
Deposits due to customers 245,944,516 242,795,510
Borrowings 18,211,997 11,592,268
Debentures 7,015,353 4,635,557
Lease liabilities 66,842 60,092
Other financial liabilities [1] 24,614,468 19,418,010
Investment contract liabilities 3,702,780  
Total 300,021,938 278,575,642
4 to 6 months    
Disclosure of maturity analysis for derivative financial liabilities by estimated redemption or withdrawal [Line Items]    
Financial liabilities at FVTPL 110,167 0
Deposits due to customers 46,024,410 43,419,738
Borrowings 4,677,678 6,678,053
Debentures 3,594,266 5,525,191
Lease liabilities 56,355 50,205
Other financial liabilities [1] 194,968 108,690
Investment contract liabilities 0  
Total 54,657,844 55,781,877
7 to 9 months    
Disclosure of maturity analysis for derivative financial liabilities by estimated redemption or withdrawal [Line Items]    
Financial liabilities at FVTPL 135,894 69,534
Deposits due to customers 31,302,585 32,989,627
Borrowings 3,880,180 4,782,453
Debentures 4,732,824 4,442,376
Lease liabilities 51,392 46,727
Other financial liabilities [1] 35,049 31,315
Investment contract liabilities 0  
Total 40,137,924 42,362,032
10 to 12 months    
Disclosure of maturity analysis for derivative financial liabilities by estimated redemption or withdrawal [Line Items]    
Financial liabilities at FVTPL 314,271 112,944
Deposits due to customers 42,075,527 38,822,980
Borrowings 3,204,104 3,678,378
Debentures 4,586,030 3,572,533
Lease liabilities 44,714 41,569
Other financial liabilities [1] 47,917 27,708
Investment contract liabilities 0  
Total 50,272,563 46,256,112
1 to 5 years    
Disclosure of maturity analysis for derivative financial liabilities by estimated redemption or withdrawal [Line Items]    
Financial liabilities at FVTPL 296,086 0
Deposits due to customers 16,164,093 14,857,886
Borrowings 3,875,284 3,555,011
Debentures 36,831,544 30,967,974
Lease liabilities 357,620 322,272
Other financial liabilities [1] 1,103,857 1,116,803
Investment contract liabilities 0  
Total 58,628,484 50,819,946
Over 5 years    
Disclosure of maturity analysis for derivative financial liabilities by estimated redemption or withdrawal [Line Items]    
Financial liabilities at FVTPL 17,501 0
Deposits due to customers 433,017 491,918
Borrowings 518,214 563,870
Debentures 2,615,848 2,673,592
Lease liabilities 44,575 50,341
Other financial liabilities [1] 3,849,974 4,287,489
Investment contract liabilities 0  
Total ₩ 7,479,129 ₩ 8,067,210
[1] Lease liabilities are not included.