XML 223 R202.htm IDEA: XBRL DOCUMENT v3.25.1

Related Party Transactions (Details 1) - BRL (R$) R$ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Related Party Transaction
Taesa	R$ 111	R$ 50
Total	R$ 111	R$ 50

X

- Definition

Dvidends Receivable Taesa

+ References

No definition available.

+ Details

Name:	cig_DvidendsReceivableTaesa
Namespace Prefix:	cig_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Dvidends Receivable Total

+ 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