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Property and equipment - Changes in property and equipment (Details) (Parenthetical) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024
Changes in property, plant and equipment [abstract] |  |
Transferred from assets under construction | ₩ 36,258 | ₩ 26,185

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- References No definition available. + Details
Name: | ifrs-full_ChangesInPropertyPlantAndEquipmentAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Transferred from assets under construction. + References No definition available. + Details
Name: | shg_TransferredFromAssetsUnderConstruction
Namespace Prefix: | shg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration