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Reporting entity - Ownership of Shinhan Financial Group and its material consolidated subsidiaries (Details) | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024
Shinhan Bank Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Card Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Securities Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Life Insurance Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Capital Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Jeju Bank |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 64.00% | 75.30%
Shinhan Asset Management Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
SHC Management Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Data System |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Savings Bank |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Asset Trust Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Fund Partners Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 99.80% | 99.80%
Shinhan REITs Management Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Venture Investment Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan EZ General Insurance Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 91.70% | 85.10%
Shinhan Bank America |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | USA | USA
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Bank Europe GmbH |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Germany | Germany
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Bank Cambodia |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Cambodia | Cambodia
Proportion of ownership interest in subsidiary | 97.50% | 97.50%
Shinhan Bank Kazakhstan Limited |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Kazakhstan | Kazakhstan
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Bank Canada |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Canada | Canada
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Bank (China) Limited |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | China | China
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Bank Japan |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Japan | Japan
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Bank Vietnam Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Vietnam | Vietnam
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Banco Shinhan de Mexico |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Mexico | Mexico
Proportion of ownership interest in subsidiary | 99.90% | 99.90%
PT Bank Shinhan Indonesia |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Indonesia | Indonesia
Proportion of ownership interest in subsidiary | 99.00% | 99.00%
HIEP HIEP THANH Investment Company Limited |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Vietnam | Vietnam
Proportion of ownership interest in subsidiary | 100.00% | 0.00%
Khoi Phat Investment Company Limited |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Vietnam | Vietnam
Proportion of ownership interest in subsidiary | 100.00% | 0.00%
SBJ DNX |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Japan | Japan
Proportion of ownership interest in subsidiary | 90.00% | 100.00%
Shinhan Credit Information Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
LLP MFO Shinhan Finance |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Kazakhstan | Kazakhstan
Proportion of ownership interest in subsidiary | 72.10% | 75.00%
PT. Shinhan Indo Finance |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Indonesia | Indonesia
Proportion of ownership interest in subsidiary | 76.30% | 76.30%
Shinhan Microfinance Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Myanmar | Myanmar
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Vietnam Finance Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Vietnam | Vietnam
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Securities America Inc. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | USA | USA
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Securities Asia Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Hong Kong | Hong Kong
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
SHINHAN SECURITIES VIETNAM CO., LTD. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Vietnam | Vietnam
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
PT. Shinhan Sekuritas Indonesia |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Indonesia | Indonesia
Proportion of ownership interest in subsidiary | 99.00% | 99.00%
Shinhan Financial Plus Co., Ltd |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan LifeCare Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Korea | Korea
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan Life Insurance Vietnam Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Vietnam | Vietnam
Proportion of ownership interest in subsidiary | 100.00% | 100.00%
Shinhan DS Vietnam Co., Ltd. |  |
Ownership of Shinhan Financial Group and its material consolidated subsidiaries [Line Items] |  |
Country of incorporation of subsidiary | Vietnam | Vietnam
Proportion of ownership interest in subsidiary | 100.00% | 100.00%

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