XML 120 R99.htm IDEA: XBRL DOCUMENT
v3.25.1

Income and Social Contribution Taxes - Schedule of Estimated Balance of Deferred Tax Asset (Details) R$ in Millions | Dec. 31, 2024 BRL (R$)
--- | ---
IfrsStatementLineItems [Line Items] |
Deferred tax assets future taxable profits | R$ 3,601
2025 [member] |
IfrsStatementLineItems [Line Items] |
Deferred tax assets future taxable profits | 528
2025 [member] |
IfrsStatementLineItems [Line Items] |
Deferred tax assets future taxable profits | 451
2026 [member] |
IfrsStatementLineItems [Line Items] |
Deferred tax assets future taxable profits | 414
2027 [member] |
IfrsStatementLineItems [Line Items] |
Deferred tax assets future taxable profits | 440
2029 to 2031 |
IfrsStatementLineItems [Line Items] |
Deferred tax assets future taxable profits | 891
2032 to 2034 |
IfrsStatementLineItems [Line Items] |
Deferred tax assets future taxable profits | R$ 877

X
- Definition Deferred income and social contribution taxes assets. + References No definition available. + Details
Name: | cig_DeferredIncomeAndSocialContributionTaxesAssets
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=cig_LaterThanFiveYearsAndNotLaterThanEightYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=cig_LaterThanEightYearsAndNotLaterThanTenYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |