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Property, Plant and Equipment (Details 2) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
HPP Gov. Jayme Canet Júnior (Mauá) [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Proportion of ownership interest in joint operation 51.00%  
Joint operations R$ 541,791 R$ 567,082
HPP Gov. Jayme Canet Júnior (Mauá) [Member] | In Service [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Joint operations R$ 860,522 859,888
Annual average depreciation rate 2.74%  
(-) Accumulated depreciation R$ (336,843) (313,253)
HPP Gov. Jayme Canet Júnior (Mauá) [Member] | In Progress [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Joint operations R$ 18,112 20,447
H P P Baixo Iguacu [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Proportion of ownership interest in joint operation 30.00%  
Joint operations R$ 603,298 630,175
H P P Baixo Iguacu [Member] | In Service [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Joint operations R$ 701,346 697,225
Annual average depreciation rate 3.30%  
(-) Accumulated depreciation R$ (132,481) (110,039)
H P P Baixo Iguacu [Member] | In Progress [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
Joint operations 34,433 42,989
Joint operations 1,145,089 1,197,257
(-) Accumulated depreciation (9,100,072) (9,421,666)
In Service [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
(-) Accumulated depreciation (9,100,072) (9,421,666)
In Progress [Member]    
Disclosure of detailed information about property, plant and equipment [line items]    
(-) Accumulated depreciation R$ 0 R$ 0