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Net other operating income and expenses - Summary of Other operating income and expenses (Details) - KRW (₩)
₩ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Other operating income      
Loans at amortized cost ₩ 249,842 ₩ 206,643 ₩ 178,158
Miscellaneous other operating income      
Gain on hedged items 607,993 753,798 422,074
Reversal of allowance for guarantees and acceptances 0 8,471 4,856
Gain on other trust accounts 0 0 2
Reversal of other allowance 1,086 8,022 1,790
Others 747,904 750,170 547,573
Miscellaneous other operating income 1,356,983 1,520,461 976,295
Other operating income 1,606,825 1,727,104 1,154,453
Other operating expense      
Loans at amortized cost (161,910) (97,821) (19,723)
Miscellaneous other operating expense      
Loss on hedged items (753,529) (626,116) (448,664)
Fund contribution (559,455) (526,196) (470,227)
Provision for payment guarantee liabilities (404) 0 0
Provision for other debt allowances (35,164) (98,344) (15,516)
Depreciation of operating lease assets (445,157) (465,716) (445,006)
Others [1] (1,977,199) (1,979,135) (1,942,047)
Miscellaneous other operating expense (3,770,908) (3,695,507) (3,321,460)
Other operating expense (3,932,818) (3,793,328) (3,341,183)
Other operating expenses, net ₩ (2,325,993) ₩ (2,066,224) ₩ (2,186,730)
[1] Includes W293,824 million for vulnerable groups such as self-employed people, small business owners and institutions supporting vulnerable groups, etc. in accordance with the “Banking financial support plan for people’s livelihood” for the year ended December 31, 2023.