v3.26.1
Risk management - EVE and NII based on interest rate risk in banking book of bank, consolidated trusts and subsidiaries of the bank (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Woori Venture Partners Co., Ltd.    
Statement One [Line Items]    
Change in EVE [1] ₩ 668 ₩ 705
Change in NII [2] 2,897 3,231
Woori Bank    
Statement One [Line Items]    
Change in EVE [1] 488,658 952,830
Change in NII [2] 685,472 668,290
Woori Card Co., Ltd.    
Statement One [Line Items]    
Change in EVE [1] 106,003 120,153
Change in NII [2] 53,435 79,515
Woori Financial Capital Co., Ltd.    
Statement One [Line Items]    
Change in EVE [1] 65,780 67,877
Change in NII [2] 9,773 16,151
Woori Investment Securities Co., Ltd.    
Statement One [Line Items]    
Change in EVE [1] 93,763 29,325
Change in NII [2] 90,407 24,911
Woori Asset Trust Co., Ltd.    
Statement One [Line Items]    
Change in EVE [1] 716 1,817
Change in NII [2] 4,982 12,802
Woori Asset Management Corp.    
Statement One [Line Items]    
Change in EVE [1] 1,134 504
Change in NII [2] 1,653 1,682
Woori Savings Bank    
Statement One [Line Items]    
Change in EVE [1] 29,858 15,117
Change in NII [2] 340 4,537
Woori Private Equity Asset Management Co., Ltd.    
Statement One [Line Items]    
Change in EVE [1] 6 17
Change in NII [2] 354 338
Woori Financial F&I Co., Ltd.    
Statement One [Line Items]    
Change in EVE [1] 86,260 97,936
Change in NII [2] ₩ 8,891 ₩ 6,858
[1] ΔEVE: change in Economic Value of Equity
[2] ΔNII: change in Net Interest Income