General administrative expenses and other net operating income (expenses) - Details of other operating expenses (Details) - KRW (₩) ₩ in Millions |
12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Other operating expenses [Abstract] | |||||||
| Net foreign exchange loss | [1] | ₩ 1,190,288 | ₩ 1,754,516 | ₩ 1,295,557 | |||
| KDIC deposit insurance premium | 500,480 | 509,832 | 464,213 | ||||
| Contribution to miscellaneous funds | 528,863 | 533,335 | 453,805 | ||||
| Gain related to derivatives (designated for hedging) | 624,781 | 24,252 | 35,583 | ||||
| Losses on fair value hedged items | 92,138 | 64,571 | 72,601 | ||||
| Others | [2] | 1,280,617 | 1,121,479 | 1,040,424 | |||
| Total | 4,217,167 | 4,007,985 | 3,362,183 | ||||
| Amortization cost of intangible assets included in other expenses | 32,495 | 28,509 | 22,349 | ||||
| Lease depreciation cost | ₩ 629,079 | ₩ 587,148 | ₩ 462,394 | ||||
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