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Insurance Risk - Summary of amount of the reinsurance contracts held (Details) - AA+ ~ AA- [member] - KRW (₩) ₩ in Millions	Dec. 31, 2025	Dec. 31, 2024
Reinsurance Residual Coverage Assets [Member]
Disclosure of information about credit risk that arises from contracts within scope of IFRS 17 [line items]
Credit risk arising from insurance contracts	₩ 335,136	₩ 0
Reinsurance Incident Assets [Member]
Disclosure of information about credit risk that arises from contracts within scope of IFRS 17 [line items]
Credit risk arising from insurance contracts	₩ 20,462	₩ 146

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

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- Definition

The amount that best represents the maximum exposure at the end of the reporting period to credit risk that arises from contracts within the scope of IFRS 17. [Refer: Credit risk [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 17
-IssueDate 2025-01-01
-Paragraph 131
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2025-en-r&anchor=para_131_a&doctype=Standard
-URIDate 2025-03-27

+ Details

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Balance Type:	na
Period Type:	instant

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- Details

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X

- Details

Name:	ifrs-full_ClassesOfAssetsAxis=shg_ReinsuranceResidualCoverageAssetsMember
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X

- Details

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