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Loans and Debentures - Schedule of Restrictive Covenants (Details) | 12 Months Ended
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Dec. 31, 2023
Eurobonds CEMIG GT [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Title | Eurobonds | [1]
Covenant | Net debt / Adjusted Ebitda for the Covenant |
Ratio required Issuer | 2.5 or less |
Ratio required cemig | 3.0 or less |
Compliance required | Semi-annual and annual |
7th and 8th Debentures Issuance CEMIG D [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Title | 7th and 8th Debentures Issuance |
Covenant | Net debt / Adjusted Ebitda |
Ratio required Issuer | 3.5 or less |
Ratio required cemig | 3.0 or less |
Compliance required | Semi-annual and annual |
8th Debentures Issuance Gasmig [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Title | 8th Debentures Issuance |
Covenant | Ebitda/Debt servicingNet debt/EBITDA |
Ratio required Issuer | 1.3 or more3.0 or less |
Compliance required | Annual |
9th Debenture Issue CEMIG GT 1st and 2nd Series [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Title | 9th Debenture Issue |
Covenant | Net debt / Adjusted Ebitda |
Ratio required Issuer | 3.5 or less |
Ratio required cemig | 3.0 or less from Dec. 31, 2022 onwards3.5 or less from Dec. 31, 2026 onwards |
Compliance required | Semi-annual and annual |
9th Debentures Issuance CEMIG D [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Title | 9th Debentures Issuance |
Covenant | Net debt / Adjusted Ebitda |
Ratio required Issuer | 3.5 or less from June 30, 2023 onwards |
Ratio required cemig | 3.5 or less from June 30, 2023 onwards |
Compliance required | Semi-annual and annual |
[1] | Adjusted Ebitda corresponds to earnings before interest, income taxes and social contribution on net income, depreciation and amortization, calculated in accordance with CVM Resolution 156, dated June 23, 2022, from which non-operating income, any credits and non-cash gains that increase net income are subtracted, to the extent that they are non-recurring, and any cash payments made on a consolidated basis during such period in respect of non-cash charges that were added back in the determination of Ebitda in any prior period, and increased by non-cash expenses and non-cash charges, to the extent that they are non-recurring.

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