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Derivative financial instruments (Details 9) - BRL (R$) R$ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
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Derivative Financial Instruments |  |
Financial Treasury Bills - LFT | R$ 18,735,636 | R$ 23,592,560
National Treasury Bills - LTN | 15,971,113 | 6,891,750
National Treasury Notes - NTN | 7,063,913 | 4,775,236
Total | R$ 41,770,662 | R$ 35,259,546

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