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CONCESSIONS AND AUTHORIZATIONS (Details Narrative) - BRL (R$)
R$ in Millions
 1 Months Ended 12 Months Ended
Sep. 19, 2019
Dec. 31, 2021
Dec. 31, 2020
IfrsStatementLineItems [Line Items]      
Discount of future payments     12.50%
Concession grant fee R$ 852    
Two Thousand And Nineteen [Member]      
IfrsStatementLineItems [Line Items]      
Percentage of Selic rate   80.00%  
Two Thousand Twenty [Member]      
IfrsStatementLineItems [Line Items]      
Percentage of Selic rate   111.00%  
Cemig Distribution [Member]      
IfrsStatementLineItems [Line Items]      
Concession expired   December 2045