XML 197 R179.htm IDEA: XBRL DOCUMENT v3.24.1.u1
Provisions - Additional Information (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended 28 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2006
Mar. 31, 2022
Dec. 31, 2021
IfrsStatementLineItems [Line Items]          
Tax credit R$ 148,000 R$ 164,000      
Provision 1,000 1,000      
Amount of contingency 368,000 276,000      
Estimated probable contingent amount R$ 24,000 23,000      
Indemnity of employees, paid     R$ 178,000    
Social security contribution amount     R$ 122,000    
Shareholding transaction description The federal tax authority issued a tax assessment against CEMIG as a jointly responsible party with its jointly controlled entity Parati S.A. Participações em Ativos de Energia Elétrica (Parati), relating to withholding income tax (Imposto de Renda Retido na Fonte, or IRRF) allegedly applicable to returns paid by reason of a capital gain in a shareholding transaction relating to the purchase by Parati, and sale, by Enlighted, at July 7, 2011, of 100.00% of the equity interests in Luce LLC (a company with head office in Delaware, USA), holder of 75.00% of the shares in the Luce Brasil equity investment fund (FIP Luce), which was indirect holder, through Luce Empreendimentos e Participações S.A., of 13.03% of the total and voting shares of Light S.A. (Light).        
Energy billing dispute, refund amount R$ 234,000        
Administrative penalty, amount 26,000        
Interest on Equity [Member]          
IfrsStatementLineItems [Line Items]          
Amount of contingency 74,000 67,000      
Deposit amount 82,000 68,000      
Labor Claims [Member]          
IfrsStatementLineItems [Line Items]          
Amount of contingency 1,795,000 1,613,000      
Estimated probable contingent amount 432,000 415,000      
Customers Claims [member]          
IfrsStatementLineItems [Line Items]          
Contigent liability amount 287,000 272,000      
Estimated probable contingent amount 45,000 41,000      
Other Civil Proceedings [member]          
IfrsStatementLineItems [Line Items]          
Contigent liability amount 653,000 573,000      
Estimated probable contingent amount 40,000 36,000      
Regulatory [Member]          
IfrsStatementLineItems [Line Items]          
Contigent liability amount 589,000 323,000      
Estimated probable contingent amount 26,000 25,000      
Public Lighting Contribution (CIP) [member]          
IfrsStatementLineItems [Line Items]          
Estimate contigent liability amount 1,582,000       R$ 1,433,000
Accounting Of Energy Sale Transactions In The Electricity Trading Chamber (CCEE) [member]          
IfrsStatementLineItems [Line Items]          
Contigent liability amount 594,000 507,000      
Tariff Increases [member]          
IfrsStatementLineItems [Line Items]          
Provision 26,000 22,000      
Amount of contingency 66,000 53,000      
Environmental Claims [member]          
IfrsStatementLineItems [Line Items]          
Contigent liability amount 149,000 137,000      
Other legal Actions [member]          
IfrsStatementLineItems [Line Items]          
Contigent liability amount 7,000        
Estimated probable contingent amount 13,000 6,000      
Estimate contigent liability amount 511,000 434,000      
Deposit amount 38,000        
Luz Para Todos' Program [member]          
IfrsStatementLineItems [Line Items]          
Estimated probable contingent amount 154 141      
Estimate contigent liability amount 515,000 470,000      
Contractual Imbalance [Member]          
IfrsStatementLineItems [Line Items]          
Estimate contigent liability amount 246,000 223,000      
IPTU [Member]          
IfrsStatementLineItems [Line Items]          
Amount of contingency 186,000 94,000      
Estimated probable contingent amount 2,000 4,000      
Social Security Contributions on Income Sharing Payments [Member]          
IfrsStatementLineItems [Line Items]          
Amount of contingency 1,789,000 1,640,000      
Estimated probable contingent amount 1,449,000 1,311,000      
Indemnity of Employees Future Benefit [Member]          
IfrsStatementLineItems [Line Items]          
Provision 142,000 136,000      
Amount of contingency 319,000 305,000      
Social Security Contributions [Member]          
IfrsStatementLineItems [Line Items]          
Amount of contingency 148,000 125,000      
Income Tax Withheld on Capital Gain in a Shareholding Transaction [Member]          
IfrsStatementLineItems [Line Items]          
Amount of contingency 274,000 256,000      
CSLL [Member]          
IfrsStatementLineItems [Line Items]          
Amount of contingency 587,000 517,000      
ICMS [Member]          
IfrsStatementLineItems [Line Items]          
Amount of contingency 223,000 182,000      
Infraction notices, amount       R$ 357,000  
Infraction notices, principal amount       124,000  
Infraction notices, penalty payments       201,000  
Infraction notices, interest amount       R$ 32,000  
Pasep and Cofins Taxes [Member]          
IfrsStatementLineItems [Line Items]          
Amount of contingency 200,000 180,000      
Power Supply Outages [Member]          
IfrsStatementLineItems [Line Items]          
Amount of contingency 103,000        
Administrative Penalty [Member]          
IfrsStatementLineItems [Line Items]          
Amount of contingency 132,000 108,000      
Application to Override Corporate Identity [Member]          
IfrsStatementLineItems [Line Items]          
Estimate contigent liability amount 127,000 103,000      
Clearance of Residential Occupation under High Voltage Lines [Member]          
IfrsStatementLineItems [Line Items]          
Estimate contigent liability amount 130,000 R$ 25,000      
Volta do Rio Wind Farm [Member]          
IfrsStatementLineItems [Line Items]          
Estimate contigent liability amount R$ 174,000