XML 34 R13.htm IDEA: XBRL DOCUMENT
v3.25.1

Marketable Securities | 12 Months Ended
--- | ---
Dec. 31, 2024
Marketable Securities |
Marketable Securities | 7. MARKETABLE SECURITIES
| Index | Average rate per year | Dec. 31, 2024 |  | Dec. 31, 2023
|  | Dec. 31, 2024 | Dec. 31, 2023 |
Investments |  |  |  |  |  |
Current |  |  |  |  |  |
Bank deposit certificates | CDI | - | 103% to 104.3% | - |  | 74
Financial Notes – Banks | CDI | 104.2% to 112% | 108.6% to 111.98% | 279 |  | 475
Treasury Financial Notes | Selic | 12.41% to 12.45% | 11.83% to 11.85% | 72 |  | 214
Others |  |  |  | 7 |  | 11
|  |  |  | 358 |  | 774
Non-current |  |  |  |  |  |
Financial Notes – Banks | CDI | 104.2% to 112% | - | 135 |  | -
|  |  |  | 135 |  | -
Total |  |  |  | 493 |  | 774
The material accounting policies and classification of these securities are shown in note 30. Investments in marketable securities of related parties are shown in Note 29. The Company and its subsidiaries consistently classify the income related to these securities as part of the cash flow of the operating activity, because they believe that this is the most appropriate presentation to properly reflect the activities.

X
- Definition Disclosure Of Investment Securities Explanatory + References No definition available. + Details
Name: | cig_DisclosureOfInvestmentSecuritiesExplanatory
Namespace Prefix: | cig_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of marketable securities. + References No definition available. + Details
Name: | cig_DisclosureOfMarketableSecuritiesAbstract
Namespace Prefix: | cig_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration