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Deposits - Summary of deposits (Details) - KRW (₩) ₩ in Millions	Dec. 31, 2025	Dec. 31, 2024
Deposits [Line Items]
Deposits	₩ 447,648,971	₩ 422,781,045
Demand Deposits
Deposits [Line Items]
Deposits	172,840,773	160,031,759
Time Deposits
Deposits [Line Items]
Deposits	238,328,250	236,527,490
Certificates of deposits
Deposits [Line Items]
Deposits	17,001,339	10,409,701
Discount note deposits
Deposits [Line Items]
Deposits	8,921,064	7,624,787
CMA
Deposits [Line Items]
Deposits	4,889,093	4,451,561
Others
Deposits [Line Items]
Deposits	5,668,452	3,735,747
Domestic currency [Member] | Demand Deposits
Deposits [Line Items]
Deposits	146,969,815	134,283,019
Domestic currency [Member] | Time Deposits
Deposits [Line Items]
Deposits	202,475,134	202,699,097
Foreign currency [Member] | Demand Deposits
Deposits [Line Items]
Deposits	25,870,958	25,748,740
Foreign currency [Member] | Time Deposits
Deposits [Line Items]
Deposits	₩ 35,853,116	₩ 33,828,393

X

- Definition

The amount of deposit liabilities held by the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_55&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_DepositLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- References

No definition available.

+ Details

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

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- Details

Name:	shg_DepositAccountAxis=shg_DemandDepositMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	shg_DepositAccountAxis=shg_BankTimeDepositMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	shg_DepositAccountAxis=shg_CertificatesOfDepositsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	shg_DepositAccountAxis=shg_NoteDiscountDepositsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	shg_DepositAccountAxis=shg_CmaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	shg_DepositAccountAxis=shg_OtherDepositsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CurrencyAxis=shg_DomesticCurrencyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CurrencyAxis=shg_ForeignCurrencyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: