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Material accounting policies - Additional Information (Details) ₩ in Millions | 12 Months Ended
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Dec. 31, 2025 KRW (₩)
Accounting Policies [Line Items] |
Low value assets | ₩ 6

X
- Definition Accounting policies. + References No definition available. + Details
Name: | shg_AccountingPoliciesLineItems
Namespace Prefix: | shg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Low value asset lease. + References No definition available. + Details
Name: | shg_LowValueAssetLease
Namespace Prefix: | shg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration