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Cash and due from banks at amortized cost - Restricted due from banks at amortized cost (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2025 | Dec. 31, 2024
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Restricted due from banks at amortized cost [Line Items] |  |
Restricted due from banks at amortized cost, total | ₩ 18,259,001 | ₩ 24,618,870
Denominated in Korean won |  |
Restricted due from banks at amortized cost [Line Items] |  |
Reserve deposits | 8,164,072 | 11,594,266
Other | 1,727,588 | 1,978,415
Restricted due from banks at amortized cost, total | 9,891,660 | 13,572,681
Denominated in foreign currency |  |
Restricted due from banks at amortized cost [Line Items] |  |
Deposits | ₩ 8,367,341 | ₩ 11,046,189

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- Definition The amount of reserve that is kept in deposit at a central bank to fulfil regulatory reserve requirements. + 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 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_112_c&doctype=Standard -URIDate 2025-03-27 + Details
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Balance Type: | debit
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- References No definition available. + Details
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Namespace Prefix: | shg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | shg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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- References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Details
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- Details
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Period Type: |