XML 180 R162.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Regulatory charges - Schedule of Research Development and Innovation (Parenthetical) (Details) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Regulatory Charges |  |
Research and development expense | R$ 6 | R$ 2

X
- Definition Disclosure Regulatory Charges Abstract + References No definition available. + Details
Name: | cig_DisclosureRegulatoryChargesAbstract
Namespace Prefix: | cig_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of expenditure directly attributable to research or development activities, recognised in profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2023-01-01 -Paragraph 126 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=38&code=ifrs-tx-2023-en-r&anchor=para_126&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_ResearchAndDevelopmentExpense
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration