XML 147 R133.htm IDEA: XBRL DOCUMENT
v3.23.2

LEASING (Details 4) - BRL (R$) R$ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
IfrsStatementLineItems [Line Items] |  |  |
Undiscounted values | R$ 806 |  |
Embedded interest | (452) |  |
Lease liabilities | 354 | R$ 244 | R$ 227
Later than one year and not later than two years [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Undiscounted values | 62 |  |
Later than three years and not later than four years [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Undiscounted values | 68 |  |
Later than four years and not later than five years [member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Undiscounted values | 58 |  |
Later Than Five Years And Not Later Than Six Years [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Undiscounted values | 58 |  |
Later Than Six Years And Not Later Than Seven Years [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Undiscounted values | 50 |  |
Later Than Seven Years [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Undiscounted values | R$ 510 |  |

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

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 liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2022-03-24 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2022-en-r&anchor=para_47_b&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_LeaseLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of undiscounted operating lease payments to be received. Operating lease is a lease that does not transfer substantially all the risks and rewards incidental to ownership of an underlying asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2022-03-24 -Paragraph 97 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2022-en-r&anchor=para_97&doctype=Standard -URIDate 2022-03-24 + Details
Name: | ifrs-full_UndiscountedOperatingLeasePaymentsToBeReceived
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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_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=cig_LaterThanFiveYearsAndNotLaterThanSixYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=cig_LaterThanSixYearsAndNotLaterThanSevenYearsMember
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: |