XML 149 R134.htm IDEA: XBRL DOCUMENT
v3.23.1

SUPPLIERS (Details) - BRL (R$) R$ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
IfrsStatementLineItems [Line Items] |  |
Suppliers | R$ 2,832 | R$ 2,683
Energy Purchased For Resale [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Suppliers | 1,162 | 1,314
Energy On Spot Market [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Suppliers | 110 | 130
Charges Energy Network [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Suppliers | 207 | 175
Itaipu Binacional [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Suppliers | 274 | 331
Gas Purchased For Resale [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Suppliers | 278 | 228
Materials And Services [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Suppliers | R$ 801 | R$ 505

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 non-current amount of payment due to suppliers for goods and services used in the entity's business. [Refer: Trade payables] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 78 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_78&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_NoncurrentPayablesToTradeSuppliers
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=cig_EnergyPurchasedForResaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=cig_EnergyOnSpotMarketMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=cig_ChargesEnergyNetworkMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=cig_ItaipuBinacionalMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=cig_GasPurchasedForResaleMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=cig_MaterialsAndServicesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |