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Intangible assets - Goodwill allocated in the Group's CGUs (Details) - KRW (₩) ₩ in Millions | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Goodwill |  |
Goodwill allocated in the Group's CGUs [Line Items] |  |
Goodwill allocated in the Group's CGUs | ₩ 4,656,673 | ₩ 4,665,417
Banking |  |
Goodwill allocated in the Group's CGUs [Line Items] |  |
Goodwill allocated in the Group's CGUs | 769,304 | 771,156
Credit card |  |
Goodwill allocated in the Group's CGUs [Line Items] |  |
Goodwill allocated in the Group's CGUs | 2,894,610 | 2,901,502
Life insurance |  |
Goodwill allocated in the Group's CGUs [Line Items] |  |
Goodwill allocated in the Group's CGUs | 850,238 | 850,238
Others |  |
Goodwill allocated in the Group's CGUs [Line Items] |  |
Goodwill allocated in the Group's CGUs | ₩ 142,521 | ₩ 142,521

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