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Derivatives - Additional Information (Details) ₩ in Millions	Dec. 31, 2025 KRW (₩)
Derivatives [Abstract]
Derivative Held As Collateral Deposite	₩ 1,614,291
Derivative Held As Collateral Security	₩ 1,550,509

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- Definition

Derivative held as collateral deposite

+ References

No definition available.

+ Details

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

X

- Definition

Derivative Held As Collateral Security

+ References

No definition available.

+ Details

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

X

- Definition

Derivatives

+ References

No definition available.

+ Details

Name:	shg_DerivativesAbstract
Namespace Prefix:	shg_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration