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Financial Instruments and Risk Management - Schedule of Changes in Value of Options (Parenthetical) (Details) R$ in Millions | 12 Months Ended
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Dec. 31, 2023 BRL (R$)
Put option - SAAG [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Aggregate value of related assets | R$ 50 | [1]
[1] | With the acquisition of the share units then held by the Funds in the Investment Structure, Cemig GT became the holder of the related assets, which have aggregate value of R$50. This amount is recognized in Other assets in the Statement of financial position.

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- Definition Related Assets + References No definition available. + Details
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Balance Type: | credit
Period Type: | duration

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- 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
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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