XML 178 R160.htm IDEA: XBRL DOCUMENT v3.24.1.u1

Regulatory charges -Schedule of Information about Amounts Recognised in relation to Regulatory Deferral Account Balances (Details) - BRL (R$) R$ in Millions	Dec. 31, 2023	Dec. 31, 2022
Liabilities
Global Reversion Reserve (RGR)	R$ 28	R$ 28
Energy Development Account (CDE)	133	127
Grantor inspection fee - ANEEL	3	3
Energy Efficiency Program	187	221
Research and development (R&D)	150	126
Energy System Expansion Research	5	4
National Scientific and Technological Development Fund	9	8
Proinfa - Alternative Energy Program	9	10
Royalties for use of water resources	11	10
Emergency capacity charge	26	26
CDE on R&D (1)	3	3
CDE on EEP	8	4
Others	5	5
Liability	577	575
Current liabilities	487	510
Non-current liabilities	R$ 90	R$ 65

X

- Definition

Aneel inspection charge.

+ References

No definition available.

+ Details

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

X

- Definition

Cde On Eep

+ References

No definition available.

+ Details

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

X

- Definition

Cde On Rd 1

+ References

No definition available.

+ Details

Name:	cig_CdeOnRd1
Namespace Prefix:	cig_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Current regulatory liability.

+ References

No definition available.

+ Details

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

X

- Definition

Emergency capacity charge.

+ References

No definition available.

+ Details

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

X

- Definition

Energy development account.

+ References

No definition available.

+ Details

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

X

- Definition

Energy efficiency program.

+ References

No definition available.

+ Details

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

X

- Definition

Energy system expansion research.

+ References

No definition available.

+ Details

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

X

- Definition

Global reversion reserve.

+ References

No definition available.

+ Details

Name:	cig_GlobalReversionReserve
Namespace Prefix:	cig_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

National scientific and technological development fund.

+ References

No definition available.

+ Details

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

X

- Definition

Noncurrent regulatory liability.

+ References

No definition available.

+ Details

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

X

- Definition

Other current regulatory liability.

+ References

No definition available.

+ Details

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

X

- Definition

Proinfa alternative energy program.

+ References

No definition available.

+ Details

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

X

- Definition

Research And Development Expense 1

+ References

No definition available.

+ Details

Name:	cig_ResearchAndDevelopmentExpense1
Namespace Prefix:	cig_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Royalties for use of water resources.

+ References

No definition available.

+ Details

Name:	cig_RoyaltiesForUseOfWaterResources
Namespace Prefix:	cig_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The amount of regulatory deferral account credit balances and the related deferred tax liability. [Refer: Regulatory deferral account credit balances; Deferred tax liability associated with regulatory deferral account balances]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 14
-IssueDate 2023-01-01
-Paragraph 24
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=14&code=ifrs-tx-2023-en-r&anchor=para_24&doctype=Standard
-URIDate 2023-03-23

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 14
-IssueDate 2023-01-01
-Paragraph B11
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=14&code=ifrs-tx-2023-en-r&anchor=para_B11_a&doctype=Appendix&subtype=B
-URIDate 2023-03-23

+ Details

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

X

- References

No definition available.

+ Details

Name:	ifrs-full_RegulatoryDeferralAccountCreditBalancesAndRelatedDeferredTaxLiabilityAbstract
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration