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Concession Contract Assets - Schedule of Periodic Tariff Review (Details)
R$ in Millions
 12 Months Ended
Dec. 31, 2024
BRL (R$)
IfrsStatementLineItems [Line Items]  
Results of the Periodic Tariff Revision R$ 1,676
RBSE - Assets until 12/2012 [Member]  
IfrsStatementLineItems [Line Items]  
Results of the Periodic Tariff Revision 164
RBNI Cycle 2013-2018 - Original [Member]  
IfrsStatementLineItems [Line Items]  
Results of the Periodic Tariff Revision 10
RBNI Cycle 2013-2018 - Revised RTP 2024 [Member]  
IfrsStatementLineItems [Line Items]  
Results of the Periodic Tariff Revision 89
RBNI Cycle 2018-2023 – Small Improvements [Member]  
IfrsStatementLineItems [Line Items]  
Results of the Periodic Tariff Revision 205
RBNI Cycle 2018-2023 – Major Improvements and Reinforcements [Member]  
IfrsStatementLineItems [Line Items]  
Results of the Periodic Tariff Revision R$ 1,208