Ifrs Statement Line Items

No definition available.

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- Definition

The amount of current financial assets. [Refer: Financial assets]

+ References

+ Details

Name:	ifrs-full_CurrentFinancialAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of current financial liabilities. [Refer: Financial liabilities]

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+ Details

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

- Definition

The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Classes of financial instruments [domain]; Financial liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 25
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_25&doctype=Standard
-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 35H
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35H&doctype=Standard
-URIDate 2024-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 35M
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35M&doctype=Standard
-URIDate 2024-03-27

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 35N
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35N&doctype=Standard
-URIDate 2024-03-27

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 35I
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_35I&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_FinancialAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Classes of financial instruments [domain]; Financial assets; Derivatives [member]]

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+ Details

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

- Definition

The amount of non-current financial assets. [Refer: Financial assets]

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+ Details

Name:	ifrs-full_NoncurrentFinancialAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	ifrs-full_TypesOfFinancialAssetsAxis=cig_AssetsRelatedToInfrastuctureMember
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- Details

Name:	ifrs-full_ServiceConcessionArrangementsAxis=cig_DistributionsConcessionsMember
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- Details

Name:	ifrs-full_ServiceConcessionArrangementsAxis=cig_GasConcessionsMember
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Data Type:	na
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- Details

Name:	ifrs-full_ServiceConcessionArrangementsAxis=cig_GenerationReceivableMember
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- Details

Name:	ifrs-full_ServiceConcessionArrangementsAxis=cig_ConcessionGrantFeeMember
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- Details

Name:	ifrs-full_ServiceConcessionArrangementsAxis=cig_CVAAndOtherFinancialComponentsInTariffAdjustmentsMember
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Data Type:	na
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- Details

Name:	ifrs-full_TypesOfFinancialAssetsAxis=cig_LiabilitiesRelatedToInfrastuctureMember
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Concession Financial and Sector Assets and Liabilities - Schedule of Financial Assets and Liabilities of Concession (Details) - BRL (R$) R$ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
IfrsStatementLineItems [Line Items]
Total assets	R$ 8,072	R$ 6,540
Total liabilities	(16)		R$ 56	R$ 42	R$ 38
Current assets	1,190	814
Non-current assets	6,882	5,726
Current liabilities	(16)
Assets related to infrastructure [member]
IfrsStatementLineItems [Line Items]
Total assets	6,776	5,735
Energy distribution concession [member] \| Assets related to infrastructure [member]
IfrsStatementLineItems [Line Items]
Total assets	2,714	1,881
Gas distribution concession [member] \| Assets related to infrastructure [member]
IfrsStatementLineItems [Line Items]
Total assets	92	38
Indemnifiable receivable - Generation [member] \| Assets related to infrastructure [member]
IfrsStatementLineItems [Line Items]
Total assets	871	785
Concession grant fee - Generation concessions [member] \| Assets related to infrastructure [member]
IfrsStatementLineItems [Line Items]
Total assets	3,099	3,031
Amounts receivable from Parcel A (CVA) and Other Financial Components [member] \| Assets related to infrastructure [member]
IfrsStatementLineItems [Line Items]
Total assets	1,296	805
Amounts receivable from Parcel A (CVA) and Other Financial Components [member] \| Liabilities related to infrastructure [member]
IfrsStatementLineItems [Line Items]
Total liabilities	R$ (16)