XML 140 R126.htm IDEA: XBRL DOCUMENT
v3.23.2

INTANGIBLE ASSETS (Details 3) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 BRL (R$)
IfrsStatementLineItems [Line Items] |
Intangible assets right to extension of concession | R$ 1,033
Cemig Geracao Camargos [Member] |
IfrsStatementLineItems [Line Items] |
Intangible assets right to extension of concession | R$ 9
End of concession | Jan. 05, 2046
Extension in years | 7 years
New end of concession | Jan. 03, 2053
Cemig Geracao Itutinga [Member] |
IfrsStatementLineItems [Line Items] |
Intangible assets right to extension of concession | R$ 8
End of concession | Jan. 05, 2046
Extension in years | 7 years
New end of concession | Jan. 03, 2053
Dona Rita [Member] |
IfrsStatementLineItems [Line Items] |
End of concession | Jul. 03, 2046
Extension in years | 4 years
New end of concession | Jul. 19, 2050
Ervalia [Member] |
IfrsStatementLineItems [Line Items] |
End of concession | Jul. 03, 2046
Extension in years | 9 months 18 days
New end of concession | Apr. 19, 2047
Neblina [Member] |
IfrsStatementLineItems [Line Items] |
End of concession | Jul. 03, 2046
Extension in years | 9 months 18 days
New end of concession | Apr. 19, 2047
Peti [Member] |
IfrsStatementLineItems [Line Items] |
End of concession | Jan. 05, 2046
Extension in years | 7 years
New end of concession | Jan. 03, 2053
Sinceridade [Member] |
IfrsStatementLineItems [Line Items] |
End of concession | Jul. 03, 2046
Extension in years | 8 months 12 days
New end of concession | Mar. 12, 2047
Tronqueiras [Member] |
IfrsStatementLineItems [Line Items] |
End of concession | Jan. 05, 2046
Extension in years | 1 year
New end of concession | Dec. 26, 2046
Cajuru Cemig [Member] |
IfrsStatementLineItems [Line Items] |
End of concession | Jan. 05, 2046
Extension in years | 7 years
New end of concession | Jan. 03, 2053
Cemig Geracao Salto Grande [Member] |
IfrsStatementLineItems [Line Items] |
Intangible assets right to extension of concession | R$ 40
End of concession | Jan. 05, 2046
Extension in years | 7 years
New end of concession | Jan. 03, 2053
Cemig Geracao Sul [Member] |
IfrsStatementLineItems [Line Items] |
Intangible assets right to extension of concession | R$ 2
Coronel Domiciano [Member] |
IfrsStatementLineItems [Line Items] |
End of concession | Jul. 03, 2046
Extension in years | 9 months 18 days
New end of concession | Apr. 11, 2047
Joasal [Member] |
IfrsStatementLineItems [Line Items] |
End of concession | Jan. 05, 2046
Extension in years | 7 years
New end of concession | Jan. 03, 2053
Marmelos [Member] |
IfrsStatementLineItems [Line Items] |
End of concession | Jan. 05, 2046
Extension in years | 7 years
New end of concession | Jan. 03, 2053
Paciencia [Member] |
IfrsStatementLineItems [Line Items] |
End of concession | Jan. 05, 2046
Extension in years | 7 years
New end of concession | Jan. 03, 2053
Piau [Member] |
IfrsStatementLineItems [Line Items] |
Intangible assets right to extension of concession | R$ 1
End of concession | Jan. 05, 2046
Extension in years | 7 years
New end of concession | Jan. 03, 2053
C E M I G Geracao Tres Marias [Member] |
IfrsStatementLineItems [Line Items] |
Intangible assets right to extension of concession | R$ 116
End of concession | Jan. 05, 2046
Extension in years | 7 years
New end of concession | Jan. 03, 2053
Cemig Poco Fundo [Member] |
IfrsStatementLineItems [Line Items] |
Intangible assets right to extension of concession | R$ 1
End of concession | May 29, 2045
Extension in years | 7 years
New end of concession | May 27, 2052
Cemig P C H Pai Joaquim [Member] |
IfrsStatementLineItems [Line Items] |
End of concession | Apr. 04, 2032
Extension in years | 4 months 24 days
New end of concession | Sep. 14, 2032
Machado Mineiro [Member] |
IfrsStatementLineItems [Line Items] |
End of concession | Jul. 08, 2025
Extension in years | 1 year 10 months 24 days
New end of concession | May 21, 2027
Rosal [Member] |
IfrsStatementLineItems [Line Items] |
Intangible assets right to extension of concession | R$ 9
End of concession | May 08, 2032
Extension in years | 3 years 7 months 6 days
New end of concession | Dec. 13, 2035
Sa Carvalho [Member] |
IfrsStatementLineItems [Line Items] |
Intangible assets right to extension of concession | R$ 40
End of concession | Dec. 01, 2024
Extension in years | 1 year 8 months 12 days
New end of concession | Aug. 27, 2026
Total [Member] |
IfrsStatementLineItems [Line Items] |
Intangible assets right to extension of concession | R$ 226
Nova Ponte [Member] |
IfrsStatementLineItems [Line Items] |
Intangible assets right to extension of concession | R$ 256
End of concession | Jul. 23, 2025
Extension in years | 2 years 1 month 6 days
New end of concession | Aug. 11, 2027
Irape [Member] |
IfrsStatementLineItems [Line Items] |
Intangible assets right to extension of concession | R$ 105
End of concession | Feb. 28, 2035
Extension in years | 2 years 7 months 6 days
New end of concession | Sep. 18, 2037
Queimado [Member] |
IfrsStatementLineItems [Line Items] |
Intangible assets right to extension of concession | R$ 19
End of concession | Dec. 18, 2032
Extension in years | 1 year 9 months 18 days
New end of concession | Jun. 26, 2034
Sao Bernardo Cemig [Member] |
IfrsStatementLineItems [Line Items] |
Intangible assets right to extension of concession | R$ 1
End of concession | Aug. 19, 2025
Extension in years | 1 year 10 months 24 days
New end of concession | Jun. 27, 2027
Emborcacao [Member] |
IfrsStatementLineItems [Line Items] |
Intangible assets right to extension of concession | R$ 426
End of concession | Jul. 23, 2025
Extension in years | 1 year 9 months 18 days
New end of concession | May 26, 2027
Total Cemig G T [Member] |
IfrsStatementLineItems [Line Items] |
Intangible assets right to extension of concession | R$ 807

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

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

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_IntangibleAssetsRightToExtensionOfConcession
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_CemigGeracaoCamargosMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_CemigGeracaoItutingaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_DonaRitaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_ErvaliaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_NeblinaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_PetiMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_SinceridadeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_TronqueirasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_CajuruCemigMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_CemigGeracaoSaltoGrandeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_CemigGeracaoSulMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_CoronelDomicianoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_JoasalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_MarmelosMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_PacienciaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_PiauMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_CEMIGGeracaoTresMariasMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_CemigPocoFundoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_CemigPCHPaiJoaquimMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_MachadoMineiroMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_RosalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_SaCarvalhoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_TotalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_NovaPonteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_IrapeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_QueimadoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_SaoBernardoCemigMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_EmborcacaoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfIntangibleAssetsAndGoodwillAxis=cig_TotalCemigGTMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |