XML 214 R196.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Revenue - Schedule of Other Operating Revenues (Parenthetical) (Details) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 BRL (R$)
Debt recognition agreement |
IfrsStatementLineItems [Line Items] |
Rental and leasing | R$ 187

X
- Definition Ifrs Statement Line Items + References No definition available. + Details
Name: | cig_IfrsStatementLineItems
Namespace Prefix: | cig_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Rental And Leasing + References No definition available. + Details
Name: | cig_RentalAndLeasing
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ifrs-full_ProductsAndServicesAxis=cig_DebtRecognitionAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |