XML 178 R163.htm IDEA: XBRL DOCUMENT
v3.23.1

PROVISIONS (Details 1) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Labour Provision [member] |  |
IfrsStatementLineItems [Line Items] |  |
Possible losses | R$ 1,199 | R$ 1,167
Customer Relations [member] |  |
IfrsStatementLineItems [Line Items] |  |
Possible losses | 231 | 149
Other Civil Actions [member] |  |
IfrsStatementLineItems [Line Items] |  |
Possible losses | 537 | 422
Civil Cases [member] |  |
IfrsStatementLineItems [Line Items] |  |
Possible losses | 768 | 571
Provision for taxes other than income tax [member] |  |
IfrsStatementLineItems [Line Items] |  |
Possible losses | 2,149 | 2,114
Regulatory [member] |  |
IfrsStatementLineItems [Line Items] |  |
Possible losses | 2,976 | 2,457
Other [member] |  |
IfrsStatementLineItems [Line Items] |  |
Possible losses | 1,361 | 1,213
Possiblelosses [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Possible losses | R$ 8,453 | R$ 7,522

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

X
- References No definition available. + Details
Name: | cig_PossibleLosses
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=cig_LabourProvisionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=cig_CustomerRelationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=cig_OtherCivilActionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=cig_CivilCaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=ifrs-full_ProvisionForTaxesOtherThanIncomeTaxMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=cig_RegulatoryOtherProvisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=cig_OtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=cig_PossiblelossesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |