XML 116 R95.htm IDEA: XBRL DOCUMENT v3.25.1

Recoverable Taxes - Additional Information (Details) - BRL (R$) R$ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
IfrsStatementLineItems [Line Items]
Period Of Recoverable Non Current Tax Assets Credit Offset Against Taxes Payable	next 48 months
PIS/PasepTaxes and Cofins [member]
IfrsStatementLineItems [Line Items]
Tax credit amount corresponds to original credit	R$ 565
Tax payables	R$ 137	R$ 1,335

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

Recoverable non-current tax assets credit offset against taxes payable period.

+ References

No definition available.

+ Details

Name:	cig_PeriodOfRecoverableNonCurrentTaxAssetsCreditOffsetAgainstTaxesPayable
Namespace Prefix:	cig_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Tax credit amount corresponds to original credit

+ References

No definition available.

+ Details

Name:	cig_TaxCreditAmountCorrespondsToOriginalCredit
Namespace Prefix:	cig_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

The amount of current excise tax payables. [Refer: Excise tax payables]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 78
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_78&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_CurrentExciseTaxPayables
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	ifrs-full_ClassesOfAcquiredReceivablesAxis=cig_PISAndPaseptaxesAndCofinsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: