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Property and equipment - Changes in property and equipment (Details) (Parenthetical) - KRW (₩) ₩ in Millions	12 Months Ended
	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.

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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