Operating Segments - Details by reporting segment Parentheticals (Details) - KRW (₩) ₩ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
|
| Disclosure of operating segments [line items] | |||
| Reclassification of deposit Insurance premiums from net interest income expense to non interest income expense | ₩ 500,480 | ₩ 509,832 | ₩ 464,213 |
| Reclassification of fund contributuion fees from net interest income expense to non interest income expense | 528,863 | 533,335 | 453,805 |
| Consolidated Adjustments | |||
| Disclosure of operating segments [line items] | |||
| Related party transaction interest income | 133,276 | ||
| Dividend received by the holding company from the subsidiary company | ₩ 1,448,486 | 1,208,522 | 1,482,956 |
| Consolidated Adjustments | Woori FIS Co., Ltd. | |||
| Disclosure of operating segments [line items] | |||
| Related party transaction interest income | ₩ 175,437 | ₩ 343,810 | |