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Shareholders equipty -Income reserves (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure of classes of share capital [line items]    
Operating Profit, Reserve Balance R$ 299,515  
Reserve Balance Increase (Decrease) R$ 14,574 R$ 7,582
Legal Reserve    
Disclosure of classes of share capital [line items]    
Reserve as Percentage of Share Capital 20.00%  
Equity, Reserve Balance R$ 1,847,109 1,847,109
Legal Reserve | Top of range [member]    
Disclosure of classes of share capital [line items]    
Percentage of Remaining Balance of Net Income 5.00%  
Reserve as Percentage of Share Capital 20.00%  
Percentage of Limited Legal Reserve Plus Capital Reserve of Share Capital 30.00%  
Capital increase reserve    
Disclosure of classes of share capital [line items]    
Reserve as Percentage of Share Capital 80.00%  
Equity, Reserve Balance R$ 2,807,632 15,670,952
Capital increase reserve | Top of range [member]    
Disclosure of classes of share capital [line items]    
Percentage of Remaining Balance of Net Income 90.00%  
Reserve as Percentage of Share Capital 80.00%  
Special statutory reserve    
Disclosure of classes of share capital [line items]    
Reserve as Percentage of Share Capital 20.00%  
Equity, Reserve Balance R$ 1,847,109 1,887,576
Special statutory reserve | Top of range [member]    
Disclosure of classes of share capital [line items]    
Percentage of Remaining Balance of Net Income 10.00%  
Reserve as Percentage of Share Capital 20.00%  
Tax incentives    
Disclosure of classes of share capital [line items]    
Equity, Reserve Balance R$ 1,319,908 998,237
Investment reserve    
Disclosure of classes of share capital [line items]    
Equity, Reserve Balance 5,157,140 R$ 14,972,324
Loss absorption (Note 24.3) R$ (7,315,184)