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Financial risk management - Market risk management from trading positions (Parenthetical) (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2025 | Dec. 31, 2024
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Market risk management from trading positions [Abstract] |  |
Market risk exposure for performance dividend type held | ₩ 5,687,547 | ₩ 4,956,743
Minimum guaranteed risk amount that could result in a possible impact | ₩ 264,326 | ₩ 280,577

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- Definition Market risk exposure for performance dividend type characteristics. + References No definition available. + Details
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- Definition Minimum guaranteed risk amount that could result in a possible impact. + References No definition available. + Details
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