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Other assets and other liabilities (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Datailed information about other assets and liabilities [Line Items]    
Other non-financial assets R$ 5,922,872 R$ 5,528,190
Other non-financial liabilities 560,191 1,080,090
Energy contracts    
Datailed information about other assets and liabilities [Line Items]    
Other non-financial assets 5,661,136 5,164,402
Other non-financial liabilities 442,003 1,012,855
Other assets (liabilities)    
Datailed information about other assets and liabilities [Line Items]    
Other non-financial assets 261,736 363,788
Other non-financial liabilities R$ 118,188 R$ 67,235