XML 146 R128.htm IDEA: XBRL DOCUMENT v3.24.1.u1

Investments - Schedule of Conclusion of the Transaction Cost Recognized the Following Accounting Effects (Parenthetical) (Details) R$ in Millions	12 Months Ended
	Dec. 31, 2023 BRL (R$)
Baguari Energia [Member]
IfrsStatementLineItems [Line Items]
Sales expenses	R$ 1

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

The amount of expense relating to the marketing and selling of goods or services.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 85
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_85&doctype=Standard
-URIDate 2023-03-23

+ Details

Name:	ifrs-full_SalesAndMarketingExpense
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	srt_CounterpartyNameAxis=cig_BaguariEnergiaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: