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Financial Instruments and Risk Management - Schedule of Risk of Increase In Inflation (Details) - BRL (R$)
R$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Assets      
Concession financial assets related to Distribution infrastructure - IPCA R$ 1,920 R$ 1,407  
Concession Grant Fee - IPCA (Note 14) 3,031 2,950  
Asset 4,951 4,357  
Liabilities      
Loans, financing and debentures - IPCA and IGP-DI (Note 22) (4,522) (4,630)  
Debt with pension fund (Forluz) - IPCA (Note 24) (90) (251)  
Deficit of pension plan (Forluz) - IPCA (Note 24) (521) (545)  
Leasing liabilities (433) (354) R$ (244)
Liability (5,566) (5,780)  
Net assets exposed R$ (615) R$ (1,423)