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v3.23.1

RECEIVABLES FROM CUSTOMERS (Details 2) - Eletrobras [Member] - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
IfrsStatementLineItems [Line Items] |  |  |
Beginning balance | R$ 833 | R$ 712 | R$ 810
Additions | 109 | 144 | 146
Disposals | (122) | (23) | (244)
Ending Balance | R$ 820 | R$ 833 | R$ 712

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- Definition Additions to advances payable. + References No definition available. + Details
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Namespace Prefix: | cig_
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Balance Type: | credit
Period Type: | duration

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- Definition Represent information about the disposals to advance payable. + References No definition available. + Details
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Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition The amount of current advances received representing current contract liabilities for performance obligations satisfied at a point in time. [Refer: Advances received, representing contract liabilities for performance obligations satisfied at point in time] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 78 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_78&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 55 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard -URIDate 2022-03-24 + Details
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Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |