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Financial assets at fair value through profit or loss - Financial assets at fair value through profit or loss (Details) (Parenthetical) - KRW (₩) ₩ in Millions	Dec. 31, 2025	Dec. 31, 2024
Financial assets at fair value through profit or loss [abstract]
Customer deposits	₩ 2,965,469	₩ 1,731,224

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- References

No definition available.

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
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- Definition

Customers' deposits.

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No definition available.

+ Details

Name:	shg_CustomersDeposits
Namespace Prefix:	shg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant