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Equity (Details 2) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Equity [abstract]    
Revaluation surplus, beginning balance R$ 307,050 R$ 593,382
Post employment benefits 363,466 (379,126)
Taxes on adjustments (123,578) 129,007
Deemed cost of fixed assets (50,552) (49,322)
Taxes on adjustments 2 17,188 16,769
Actuarial liability - investment realization 4,018  
Adjustments on financial assets - subsidiaries (569) (6,373)
Taxes on other adjustments 3 243 2,167
Attributed to non-controlling interest 142 546
Revaluation surplus, ending balance R$ 517,408 R$ 307,050