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Financial risk management - Credit loss allowances of financial assets (Parenthetical) (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2025 | Dec. 31, 2024
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Financial assets at fair value through other comprehensive income |  |
Impairment information by credit risk of financial assets [Line Items] |  |
Credit loss allowance recognised | ₩ 60,301 | ₩ 38,346

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- Definition Allowance for credit losses of financial assets. + References No definition available. + Details
Name: | shg_AllowanceForCreditLossesOfFinancialAssets
Namespace Prefix: | shg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

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- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=ifrs-full_FinancialAssetsAtFairValueThroughOtherComprehensiveIncomeCategoryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |