XML 161 R140.htm IDEA: XBRL DOCUMENT
v3.25.1

Taxes Payable and Amounts to be Refunded to Customers - Schedule of Taxes and Amounts to be Restituted to Customers (Details) - BRL (R$) R$ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
IfrsStatementLineItems [Line Items] |  |  |  |  |
Current taxes payable | R$ 725 |  | R$ 644 |  |
Non current Taxes payable | 496 |  | 362 |  |
Total tax payable | 1,221 |  | 1,006 |  |
Pasep and Cofins taxes to be reimbursed to customers | 692 |  | 1,518 | R$ 3,304 | R$ 3,023
ICMS [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Current taxes payable | 146 |  | 113 |  |
COFINS [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Current taxes payable | 278 | [1] | 225 |  |
Non current Taxes payable | 407 |  | 297 |  |
PIS/PASEP [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Current taxes payable | 61 |  | 49 |  |
Non current Taxes payable | 89 |  | 65 |  |
INSS [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Current taxes payable | 59 |  | 54 |  |
Other Tax Authority [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Current taxes payable | 181 | [2] | 203 |  |
PIS/PASEP and COFINS [member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Current taxes payable | 185 |  | 513 |  |
Non current Taxes payable | 166 |  | 664 |  |
ICMS [Member] |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |
Current taxes payable | R$ 341 |  | R$ 341 |  |
[1] | PIS/Pasep and Cofins recorded in current liabilities include the deferral on the financial remuneration of the contract asset and on the construction and improvement revenues linked to the transmission contracts. For more information, see Note 15.
[2] | This includes the retention, at source, of income tax on the Interest on Equity declared. This tax was paid in the subsequent month, in accordance with the tax legislation. More details in note 25.

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 Net Deferred Tax Liabilitie + References No definition available. + Details
Name: | cig_NetDeferredTaxLiabilitie
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Pasep and Cofins taxes to be reimbursed to customers. + References No definition available. + Details
Name: | cig_PasepAndCofinsTaxesToBeReimbursedToCustomers
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The current amount of current tax liabilities. [Refer: Current tax liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 54 -Subparagraph n -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_n&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_CurrentTaxLiabilitiesCurrent
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The non-current amount of current tax liabilities. [Refer: Current tax liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 54 -Subparagraph n -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_54_n&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_CurrentTaxLiabilitiesNoncurrent
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=cig_ICMSRelatedMattersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=cig_COFINSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=cig_PasepMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=cig_INSSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=cig_OtherTaxAuthorityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=cig_PasepAndCofinsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfLiabilitiesAxis=cig_ICMSMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |