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RELATED PARTY TRANSACTIONS (Details 1) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Related party transactions [abstract] |  |  |
Light |  |  | R$ 71
Aliança Geração |  | 127 | 225
Taesa |  | 5 | 32
Others | [1] | 14 | 7
Dividends Receivable Total |  | R$ 155 | R$ 335
[1] | The subsidiaries grouped in ‘Others’ are identified in the table above under ‘Interest on Equity, and Dividends’.

X
- References No definition available. + Details
Name: | cig_DvidendsReceivableAlianca
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | cig_DvidendsReceivableLight
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | cig_DvidendsReceivableOther
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | cig_DvidendsReceivableTaesa
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | cig_DvidendsReceivableTotal
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | ifrs-full_RelatedPartyTransactionsAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration