XML 220 R206.htm IDEA: XBRL DOCUMENT
v3.23.2

COMMITMENTS (Details) R$ in Millions | Dec. 31, 2022 BRL (R$)
--- | ---
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | R$ 199,656
Purchase of energy from itaipu [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 45,470
Purchase of energy auctions [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 72,892
Purchase of energy bilateral contracts [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 1,464
Quotas of angra 1 and angra 2 [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 9,469
Transport of energy from itaipu [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 4,392
Other energy purchase contracts [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 51,338
Physical quota guarantees [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 14,631
Later than one year and not later than two years [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 13,140
Later than one year and not later than two years [member] | Purchase of energy from itaipu [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 1,819
Later than one year and not later than two years [member] | Purchase of energy auctions [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 3,886
Later than one year and not later than two years [member] | Purchase of energy bilateral contracts [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 488
Later than one year and not later than two years [member] | Quotas of angra 1 and angra 2 [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 375
Later than one year and not later than two years [member] | Transport of energy from itaipu [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 201
Later than one year and not later than two years [member] | Other energy purchase contracts [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 5,543
Later than one year and not later than two years [member] | Physical quota guarantees [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 828
Later than two years and not later than three years [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 12,661
Later than two years and not later than three years [member] | Purchase of energy from itaipu [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 1,819
Later than two years and not later than three years [member] | Purchase of energy auctions [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 3,932
Later than two years and not later than three years [member] | Purchase of energy bilateral contracts [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 489
Later than two years and not later than three years [member] | Quotas of angra 1 and angra 2 [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 378
Later than two years and not later than three years [member] | Transport of energy from itaipu [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 222
Later than two years and not later than three years [member] | Other energy purchase contracts [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 5,044
Later than two years and not later than three years [member] | Physical quota guarantees [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 777
Later than three years and not later than four years [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 11,442
Later than three years and not later than four years [member] | Purchase of energy from itaipu [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 1,819
Later than three years and not later than four years [member] | Purchase of energy auctions [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 3,524
Later than three years and not later than four years [member] | Purchase of energy bilateral contracts [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 310
Later than three years and not later than four years [member] | Quotas of angra 1 and angra 2 [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 377
Later than three years and not later than four years [member] | Transport of energy from itaipu [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 222
Later than three years and not later than four years [member] | Other energy purchase contracts [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 4,486
Later than three years and not later than four years [member] | Physical quota guarantees [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 704
Later than four years and not later than five years [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 11,044
Later than four years and not later than five years [member] | Purchase of energy from itaipu [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 1,819
Later than four years and not later than five years [member] | Purchase of energy auctions [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 3,808
Later than four years and not later than five years [member] | Purchase of energy bilateral contracts [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 99
Later than four years and not later than five years [member] | Quotas of angra 1 and angra 2 [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 377
Later than four years and not later than five years [member] | Transport of energy from itaipu [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 221
Later than four years and not later than five years [member] | Other energy purchase contracts [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 4,086
Later than four years and not later than five years [member] | Physical quota guarantees [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 634
Later than five years [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 10,571
Later than five years [member] | Purchase of energy from itaipu [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 1,819
Later than five years [member] | Purchase of energy auctions [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 3,631
Later than five years [member] | Purchase of energy bilateral contracts [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 19
Later than five years [member] | Quotas of angra 1 and angra 2 [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 379
Later than five years [member] | Transport of energy from itaipu [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 221
Later than five years [member] | Other energy purchase contracts [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 3,967
Later than five years [member] | Physical quota guarantees [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 535
Later Than Seven Years [Member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 140,798
Later Than Seven Years [Member] | Purchase of energy from itaipu [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 36,375
Later Than Seven Years [Member] | Purchase of energy auctions [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 54,111
Later Than Seven Years [Member] | Purchase of energy bilateral contracts [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 59
Later Than Seven Years [Member] | Quotas of angra 1 and angra 2 [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 7,583
Later Than Seven Years [Member] | Transport of energy from itaipu [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 3,305
Later Than Seven Years [Member] | Other energy purchase contracts [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | 28,212
Later Than Seven Years [Member] | Physical quota guarantees [member] |
IfrsStatementLineItems [Line Items] |
Total contractual obligations and commitments | R$ 11,153

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 amount of capital commitments for which the entity has entered into a contract. [Refer: Capital commitments] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_112_c&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_ContractualCapitalCommitments
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=cig_PurchaseOfEnergyFromItaipuMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=cig_PurchaseOfEnergyAuctionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=cig_PurchaseOfEnergyBilateralContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=cig_QuotasOfAngra1AndAngra2Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=cig_TransportOfEnergyFromItaipuMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=cig_OtherEnergyPurchaseContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfFinancialInstrumentsAxis=cig_PhysicalQuotaGuaranteesMember
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=ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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