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Dividends - Details of dividends recognized as distributions to stockholders (Parenthetical) (Details) - ₩ / shares | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Details of dividends recognized as distributions to stockholders [Line Items] |  |  |
Treasury shares acquired at the end reporting period | 2,723,039 |  |
Common stocks |  |  |
Details of dividends recognized as distributions to stockholders [Line Items] |  |  |
Dividend per share | ₩ 2,590 | ₩ 2,160 | ₩ 2,100
Dividend rate per shares | 51.80% | 43.20% | 42.00%

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- Definition Dividend per share. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Dividend rate per shares. + References No definition available. + Details
Name: | shg_DividendRatePerShares
Namespace Prefix: | shg_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | shg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Treasury shares acquired at the end reporting period. + References No definition available. + Details
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Namespace Prefix: | shg_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |