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Loans at amortized cost, etc. - Changes in loans at amortized cost, etc. (Details) (Parenthetical) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024
Changes in loans at amortized cost and other assets [Abstract] |  |
Recovery of loans and advances uncollected amount written off. | ₩ 10,682,802 | ₩ 10,268,898

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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 Recovery of loans and advances uncollected amount written off. + References No definition available. + Details
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Namespace Prefix: | shg_
Data Type: | xbrli:monetaryItemType
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Period Type: | duration