XML 89 R74.htm IDEA: XBRL DOCUMENT
v3.23.1

BASIS OF PREPARATION (Details) | 12 Months Ended
--- | ---
Dec. 31, 2022
I A S 37 [Member] |
IfrsStatementLineItems [Line Items] |
Standard | IAS 37 - Provisions, Contingent Liabilities and Contingent Assets
Main charges | Specification of which costs the entity needs to include when assessing whether a contract is onerous. The amendment applies a 'directly related cost approach', whereby the cost that directly relates to a contract to provide goods or services includes incremental costs and a cost allocation directly related to the contract activities. General and administrative costs do not relate directly to a contract and are excluded unless they are explicitly charged to the counterparty under the contract.
Effective date | January 1, 2022
I A S 16 [Member] |
IfrsStatementLineItems [Line Items] |
Standard | IAS 16 - Fixed Assets
Main charges | Refers to the impossibility for entities to deduct from the cost of property, plant and equipment any revenues arising from the sale of items produced while the asset is established in the location and condition necessary for it to be capable of operating in the manner intended by management. These revenues and associated costs must be recognized directly in income.
Effective date | January 1, 2022
I F R S 3 [Member] |
IfrsStatementLineItems [Line Items] |
Standard | IFRS 3 - Business Combination
Main charges | In addition to the changes related to the reference to the conceptual framework, which did not significantly change the required standards, an exception to the IFRS 3 recognition principle was added to avoid the problem of potential ‘day 2’ gains and losses arising from contingent liabilities and liabilities that would be in the scope of IAS 37 or IFRIC 21 if incurred separately.
Effective date | January 1, 2022
IFRS 17 [member] |
IfrsStatementLineItems [Line Items] |
Standard | IFRS 17 - Insurance contracts, issued by the IASB in May 2017
Main charges | The standard, not yet issued in Brazil, has the general objective of providing an accounting model for insurance contracts, regardless of the type of entity that issues them, that is more useful and consistent for insurance issuers, and is not initially applicable to the Company and its subsidiaries. This standard does not have a corresponding standard in Brazil.
Effective date | January 1, 2023
I A S 1 [Member] |
IfrsStatementLineItems [Line Items] |
Standard | IAS 1 - Review of the classification of liabilities as current and non-current
Main charges | Clarify, among others, the concept of deferring the settlement of a liability, in addition to defining that the right to defer must exist at the end of the reporting period and that the classification is independent of the probability that the entity will exercise its right to defer. In addition, the revision states that only if the derivative embedded in a convertible liability is an equity instrument will the terms of the liability not impact its classification.
Effective date | January 1, 2023
I A S 8 [Member] |
IfrsStatementLineItems [Line Items] |
Standard | IAS 08 - Accounting Policies, Changes in Estimates and Correction of Errors - Definition of accounting estimates
Main charges | Clarify the distinction between changes in accounting estimates, changes in accounting policies, and correction of errors, as well as how entities use measurement techniques and inputs to develop accounting estimates
Effective date | January 1, 2023
I F R S Practice Statement 2 [Member] |
IfrsStatementLineItems [Line Items] |
Standard | IAS 01 and IFRS Practice Statement 2 - Making Materiality Judgements
Main charges | Assists entities in providing accounting policy disclosures that are more useful by replacing the requirement to disclose significant accounting policies with disclosure of material accounting policies and adds guidance on how the entity applies the concept of materiality when making accounting policy disclosure decisions.
Effective date | January 1, 2023
I A S 12 [Member] |
IfrsStatementLineItems [Line Items] |
Standard | IAS 12 - Deferred tax related to assets and liabilities arising from a unique transaction
Main charges | Restrict the scope of the initial recognition exemption so that it does not apply to transactions that give rise to equal and offsetting temporary differences, resulting in the recognition of a deferred tax asset and a deferred tax liability for temporary differences arising from the initial recognition of leases and decommissioning provisions.
Effective date | January 1, 2023

X
- References No definition available. + Details
Name: | cig_IfrsStatementLineItems
Namespace Prefix: | cig_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The description of the fact that a new or amended IFRS Standard is applied earlier than its effective date. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2025-01-01 -Name IFRS -Number 17 -IssueDate 2022-03-24 -Paragraph C1 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2022-en-r&anchor=para_C1&doctype=Appendix&subtype=C -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2024-01-01 -Name IFRS -Number 1 -IssueDate 2022-03-24 -Paragraph 39AG -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2022-en-r&anchor=para_39AG&doctype=Standard -URIDate 2022-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2024-01-01 -Name IAS -Number 37 -IssueDate 2022-03-24 -Paragraph 105 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=37&code=ifrs-tx-2022-en-r&anchor=para_105&doctype=Standard -URIDate 2022-03-24 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2024-01-01 -Name IAS -Number 41 -IssueDate 2022-03-24 -Paragraph 65 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=41&code=ifrs-tx-2022-en-r&anchor=para_65&doctype=Standard -URIDate 2022-03-24 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -Name IFRS -Number 16 -IssueDate 2022-03-24 -Paragraph C1B -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2022-en-r&anchor=para_C1B&doctype=Appendix&subtype=C -URIDate 2022-03-24 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2024-01-01 -Name IAS -Number 16 -IssueDate 2022-03-24 -Paragraph 81N -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=16&code=ifrs-tx-2022-en-r&anchor=para_81N&doctype=Standard -URIDate 2022-03-24 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -Name IFRS -Number 4 -IssueDate 2022-03-24 -Paragraph 50 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=4&code=ifrs-tx-2022-en-r&anchor=para_50&doctype=Standard -URIDate 2022-03-24 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2025-01-01 -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 139U -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_139U&doctype=Standard -URIDate 2022-03-24 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2024-01-01 -Name IFRS -Number 9 -IssueDate 2022-03-24 -Paragraph 7.1.9 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=9&code=ifrs-tx-2022-en-r&anchor=para_7.1.9&doctype=Standard -URIDate 2022-03-24 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -Name IFRS -Number 9 -IssueDate 2022-03-24 -Paragraph 7.1.10 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=9&code=ifrs-tx-2022-en-r&anchor=para_7.1.10&doctype=Standard -URIDate 2022-03-24 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -Name IAS -Number 39 -IssueDate 2022-03-24 -Paragraph 108H -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=39&code=ifrs-tx-2022-en-r&anchor=para_108H&doctype=Standard -URIDate 2022-03-24 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2025-01-01 -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 139V -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_139V&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_DescriptionOfFactThatNewOrAmendedIFRSStandardIsAppliedEarly
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The description of the nature of a change in accounting policy related to an initial application of an IFRS. [Refer: IFRSs [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 8 -IssueDate 2022-03-24 -Paragraph 28 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=8&code=ifrs-tx-2022-en-r&anchor=para_28_c&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_DescriptionOfNatureOfChangeInAccountingPolicy
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The title of an initially applied IFRS. [Refer: IFRSs [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 8 -IssueDate 2022-03-24 -Paragraph 28 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=8&code=ifrs-tx-2022-en-r&anchor=para_28_a&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_TitleOfInitiallyAppliedIFRS
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_InitiallyAppliedIFRSsAxis=cig_IAS37Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_InitiallyAppliedIFRSsAxis=cig_IAS16Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_InitiallyAppliedIFRSsAxis=cig_IFRS3Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_InitiallyAppliedIFRSsAxis=ifrs-full_IFRS17Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_InitiallyAppliedIFRSsAxis=cig_IAS1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_InitiallyAppliedIFRSsAxis=cig_IAS8Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_InitiallyAppliedIFRSsAxis=cig_IFRSPracticeStatement2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_InitiallyAppliedIFRSsAxis=cig_IAS12Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |