XML 201 R165.htm IDEA: XBRL DOCUMENT
v3.22.1

The calculation of the minimum dividends proposed for distribution to Shareholders, considering the 2021 unrealized profit assumption mentioned in the previous paragraphs, is as follows: (Details) - BRL (R$) R$ / shares in Units, R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Calculation of Minimum Dividends required by the By-laws for the preferred shares |  |  |
Nominal value of the preferred shares | R$ 5,637 | R$ 5,055 | R$ 4,856
Preferred shares | R$ 5,637 | R$ 5,055 | R$ 4,856
Percentage applied to the nominal value of the preferred shares | 10.00% | 10.00% | 10.00%
Amount of the dividends by the first payment criterion | R$ 564 | R$ 506 | R$ 486
Equity | R$ 19,457 | R$ 17,473 | R$ 15,887
Preferred shares as a percentage of Equity (net of shares held in Treasury) | 66.56% | 66.56% | 66.56%
Portion of Equity represented by the preferred shares | R$ 12,950 | R$ 11,630 | R$ 10,574
[custom:PercentageAppliedToPortionOfEquityRepresentedByPreferredShares] | 3.00% | 3.00% | 3.00%
Amount of the dividends by the second payment criterion | R$ 389 | R$ 349 | R$ 317
Minimum Dividends required by the Bylaws for the preferred shares | 564 | 506 | 486
Net income for the year | 3,751 | 2,864 | 3,127
Mandatory dividends – 50% of Net income | 1,876 | 1,432 | 1,564
Unrealized profit reserve | (835) | (835) | (835)
Reversal of the unrealized profit reserve established in 2019 | 835 | 835 |
Withholding income tax on Interest on equity | 91 | 50 | 35
Minimum Dividend under the by-laws including income tax on interest on equity | 1,967 | 1,482 | 764
Dividends recorded, as specified in the by-laws |  |  |
Interest on Equity | 956 | 553 | 400
Ordinary dividends | 1,011 | 929 | 364
Total dividends for the preferred shares | 1,309 | 986 | 509
Total dividends for the common shares | R$ 658 | R$ 496 | R$ 255
Unit value of dividends – R$ |  |  |
Minimum dividends required by the by-laws for the preferred shares | R$ 0.50 | R$ 0.50 | R$ 0.50
Mandatory dividends (including withholding income tax on Interest on Equity) | 1.16 | 0.99 | 0.52
Dividends proposed: Common (ON) shares | 1.16 | 0.99 | 0.52
Dividends proposed: Preferred (PN) shares | R$ 1.16 | R$ 0.99 | R$ 0.52
Restated 1 [Member] |  |  |
Calculation of Minimum Dividends required by the By-laws for the preferred shares |  |  |
Minimum Dividend under the by-laws including income tax on interest on equity | R$ 1,967 | R$ 1,482 | R$ 764

X
- References No definition available. + Details
Name: | cig_AmountOfDividendsByFirstPaymentsCriterion
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_AmountOfDividendsBySecondPaymentCriterion
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_CalculationOfMinimumDividendsRequiredByBylawsForPreferredSharesAbstract
Namespace Prefix: | cig_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | cig_DividendsProposedCommonOnShares
Namespace Prefix: | cig_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_DividendsProposedPreferredPnShares
Namespace Prefix: | cig_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_DividendsRecordedAsSpecifiedInBylawsAbstract
Namespace Prefix: | cig_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | cig_EquityDividends
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_InterestOnEquity
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_MandatoryDividends50OfNetIncome
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_MandatoryDividendsIncludingWithholdingIncomeTaxOnInterestOnEquity
Namespace Prefix: | cig_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_MinimumDividendPerShareUnderByLaws
Namespace Prefix: | cig_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Minimum dividend under by laws including income tax on interest on equity. + References No definition available. + Details
Name: | cig_MinimumDividendUnderByLawsIncludingIncomeTaxOnInterestOnEquity
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | cig_MinimumDividendsRequiredByBylawsForPreferredShares
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_NetIncomeForYear
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_NominalValueOfPreferredShares
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_OrdinaryDividends
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_PercentageAppliedToNominalValueOfPreferredShares
Namespace Prefix: | cig_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | cig_PercentageAppliedToPortionOfEquityRepresentedByPreferredShares
Namespace Prefix: | cig_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | cig_PortionOfEquityRepresentedByPreferredShares
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_PreferredShares
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_PreferredSharesAsPercentageOfEquityNetOfSharesHeldInTreasury
Namespace Prefix: | cig_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | cig_ReversalOfUnrealizedProfitReserveEstablishedIn2019
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_TotalDividendsForCommonShares
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_TotalDividendsForPreferredShares
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_UnitValueOfDividendsRAbstract
Namespace Prefix: | cig_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | cig_UnrealizedProfitReserveDividend
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | cig_WithholdingIncomeTaxOnInterestOnEquity
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_RetrospectiveApplicationAndRetrospectiveRestatementAxis=cig_Restated1Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |