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Personnel expenses (Details 2) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023
Santander Brasil Bank Shares [Member] | Local [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Impact on results - personnel expenses | R$ 8,407 | R$ 6,178 | R$ 17,097
Santander Spain Shares And Options [Member] | Global [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Impact on results - personnel expenses | R$ 5,971 | R$ 6,953 | R$ 6,380

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