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Schedule of restrictive covenants (Details) | 12 Months Ended
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Dec. 31, 2021
Debentures Issue 1 [Member] |
IfrsStatementLineItems [Line Items] |
[custom:DescriptionOfTitleOfSecurities] | 7th Debentures Issue
Description of covenant | Net debt
[custom:DescriptionOfRatioRequiredIssuer] | The following or less:
[custom:DescriptionOfRatioRequiredCemig] | The following or less:
[custom:DescriptionOfComplianceRequired] | Semi-annual and annual
Debentures Issue 6 [Member] |
IfrsStatementLineItems [Line Items] |
[custom:DescriptionOfTitleOfSecurities] | Eurobonds
Description of covenant | EBITDA/Debt servicing
[custom:DescriptionOfRatioRequiredIssuer] | 1.3 or more
[custom:DescriptionOfComplianceRequired] | Annual
Debentures Issue 3 [Member] |
IfrsStatementLineItems [Line Items] |
Description of covenant | Ebitda adjusted for the Covenant (3)
Debentures Issue 2 [Member] |
IfrsStatementLineItems [Line Items] |
[custom:DescriptionOfTitleOfSecurities] | Cemig D
Description of covenant | Ebitda adjusted
[custom:DescriptionOfRatioRequiredIssuer] | The following or Less than 3.5
[custom:DescriptionOfRatioRequiredCemig] | The following or Less than 3.0
[custom:DescriptionOfComplianceRequired] | Semi-annual and annual
Debentures Issue 4 [Member] |
IfrsStatementLineItems [Line Items] |
[custom:DescriptionOfTitleOfSecurities] | Debentures
Description of covenant | Ebitda / Debt servicing
[custom:DescriptionOfRatioRequiredIssuer] | 1.3 or more
[custom:DescriptionOfComplianceRequired] | Annual
Debentures Issue 5 [Member] |
IfrsStatementLineItems [Line Items] |
[custom:DescriptionOfTitleOfSecurities] | GASMIG (4)
Description of covenant | Ebitda / Net finance income (expenses)
[custom:DescriptionOfRatioRequiredIssuer] | 2.5 or more
[custom:DescriptionOfComplianceRequired] | Annual
Debentures Issue 10 [Member] |
IfrsStatementLineItems [Line Items] |
Description of covenant | Overall indebtedness (Total liabilities/Total assets)
[custom:DescriptionOfRatioRequiredIssuer] | Less than 0.6
[custom:DescriptionOfComplianceRequired] | Annual
Debentures Issue 11 [Member] |
IfrsStatementLineItems [Line Items] |
[custom:DescriptionOfTitleOfSecurities] | Net debt / Ebitda
[custom:DescriptionOfRatioRequiredIssuer] | The following or less:
[custom:DescriptionOfComplianceRequired] | Annual
Debentures Issue [Member] |
IfrsStatementLineItems [Line Items] |
[custom:DescriptionOfTitleOfSecurities] | 8th Debentures Issue
Debentures Issue 7 [Member] |
IfrsStatementLineItems [Line Items] |
[custom:DescriptionOfTitleOfSecurities] | Financings Caixa Econômica Federal (CEF)
Description of covenant | Debt servicing coverage index
[custom:DescriptionOfRatioRequiredIssuer] | 1.20 or more
[custom:DescriptionOfComplianceRequired] | Annual (during amortization)

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