XML 95 R74.htm IDEA: XBRL DOCUMENT
v3.25.1

Subsequent Event (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Disclosure of non-adjusting events after reporting period [line items] |
Schedule Of Average Adjustments Of Consumer Rates Table Text Block |
Market segment | Adjustment (%)
Industrial | (0.18)
Co-generation | (0.44)
Automotive | (0.33)
Compressed Natural Gas / Liquefied Natural Gas | (1.32)
Schedule of Debentures Issued |
Series | Quantity | Amount | Remuneration | Maturity | Amortization
First Series | 1,000,000 | R$1,000,000 | CDI + 0.55% | 7 years | 72 th e 84 th months
Second Series | 1,500,000 | R$1,500,000 | IPCA + 6.5769% | 12 years | 132 th e 144 th months
Series | Quantity | Amount | Remuneration | Maturity | Amortization
Single | 200,000 | R$200 | CDI + 0.47% | 5 years | 36 th , 48 th e 60 th months
Unsecured Debentures Tenth Issue Member |
Disclosure of non-adjusting events after reporting period [line items] |
Schedule of Debentures Issued |
Serie | Quantity | Value in million | Rate | Deadline | Amortization
Single | 625,000 | R$ 625 | CDI + 0.64% p.a. | 1,826 days | 48th and 60th month
Unsecured Debentures Twelth Issue Member |
Disclosure of non-adjusting events after reporting period [line items] |
Schedule of Debentures Issued |
Serie | Quantity | Value in million | Rate | Deadline | Amortization
1st | 1,640,000 | R$ 1,640 | CDI + 0.86% p.a. | 2,557 days | 72nd and 84th month
2nd | 860,000 | R$ 860 | IPCA + 7.5467% p.a. | 5,479 days | 156th, 168th and 180th month
Unsecured Debentures 13th Issue [Member] |
Disclosure of non-adjusting events after reporting period [line items] |
Schedule of Debentures Issued |
Series | Quantity | Value in millions | Rate | Term | Amortization
1 st | 1,143,000 | R$1.143 | CDI + 0.64% p.a. | 1,831 days | 48th and 60th months
2 nd | 752,000 | R$752 | IPCA + 0.80% p.a. | 2,562 days | 72nd and 84th months

X
- Definition Tabular disclosure of average adjustments of consumer rates. + References No definition available. + Details
Name: | cig_ScheduleOfAverageAdjustmentsOfConsumerRatesTableTextBlock
Namespace Prefix: | cig_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule of Debentures Issued. + References No definition available. + Details
Name: | cig_ScheduleOfDebenturesIssuedTableTextBlock
Namespace Prefix: | cig_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfNonadjustingEventsAfterReportingPeriodLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=cig_UnsecuredDebenturesTenthIssueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=cig_UnsecuredDebenturesTwelthIssueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=cig_UnsecuredDebentures13thIssueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |