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FINANCIAL INSTRUMENTS AND RISK MANAGEMENT (Details 10) - BRL (R$)
R$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Assets    
Concession financial assets related to Distribution infrastructure - IPCA [1] R$ 1,407 R$ 718
Concession Grant Fee - IPCA (Note 14) 2,950 2,792
Assets 53,671 52,046
Liabilities    
Loans and debentures - IPCA and IGP-DI (Note 22) (4,630) (4,322)
Deficit of pension plan (Forluz) (Note 24) (545) (539)
Liabilities (31,887) R$ (32,584)
IPCA [member] | Amount Book Value [Member]    
Assets    
Concession financial assets related to Distribution infrastructure - IPCA 1,370  
Concession financial assets related to gas distribution infrastructure - IGPM 37  
Concession Grant Fee - IPCA (Note 14) 2,950  
Assets 4,357  
Liabilities    
Loans and debentures - IPCA and IGP-DI (Note 22) (4,630)  
Debt agreed with pension fund (Forluz) - IPCA (Note 24) (251)  
Deficit of pension plan (Forluz) (Note 24) (545)  
Liabilities (5,426)  
Net liabilities exposed (1,069)  
IPCA [member] | Probable Ccenario [Member]    
Assets    
Concession financial assets related to Distribution infrastructure - IPCA 1,442  
Concession financial assets related to gas distribution infrastructure - IGPM 38  
Concession Grant Fee - IPCA (Note 14) 3,107  
Assets 4,587  
Liabilities    
Loans and debentures - IPCA and IGP-DI (Note 22) (4,875)  
Debt agreed with pension fund (Forluz) - IPCA (Note 24) (265)  
Deficit of pension plan (Forluz) (Note 24) (574)  
Liabilities (5,714)  
Net liabilities exposed (1,127)  
Net effect of fluctuation in IPCA and IGP-M indexes (58)  
IPCA [member] | Adverse Scenario [Member]    
Assets    
Concession financial assets related to Distribution infrastructure - IPCA 1,478  
Concession financial assets related to gas distribution infrastructure - IGPM 39  
Concession Grant Fee - IPCA (Note 14) 3,184  
Assets 4,701  
Liabilities    
Loans and debentures - IPCA and IGP-DI (Note 22) (4,996)  
Debt agreed with pension fund (Forluz) - IPCA (Note 24) (271)  
Deficit of pension plan (Forluz) (Note 24) (588)  
Liabilities (5,855)  
Net liabilities exposed (1,154)  
Net effect of fluctuation in IPCA and IGP-M indexes R$ (85)  
[1] Portion of the concession financial assets relating to the Regulatory Remuneration Base of Assets ratified by the grantor (ANEEL) after the 4th tariff review cycle.