XML 196 R160.htm IDEA: XBRL DOCUMENT
v3.22.1

The calculation of basic and diluted earnings per share 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
IfrsStatementLineItems [Line Items] |  |  |
Net income for the year attributed to equity holders of the parent | R$ 3,751 | R$ 2,864 | R$ 3,194
Minimum mandatory dividend from net income for the year - preferred shares | 1,309 | 986 | 509
Net income for the year not distributed - preferred shares | 1,188 | 920 | 1,617
Total earnings - preferred shares (A) | 2,497 | 1,906 | 2,126
Minimum mandatory dividend from net income for the year - common shares | 657 | 496 | 256
Net income for the year not distributed - common shares | 597 | 462 | 812
Total earnings - common shares (B) | R$ 1,254 | R$ 958 | R$ 1,068
Basic and diluted earnings from continuing operations per preferred share (A.1 / number of preferred shares) | R$ 1.70 | R$ 1.30 | R$ 1.45
Basic and diluted earnings from continuing operations per common share (B.1 / number of common shares) | 1.70 | 1.30 | 1.45
Continuing Operations Of Shareholder [Member] |  |  |
IfrsStatementLineItems [Line Items] |  |  |
Basic and diluted earnings from continuing operations per preferred share (A.1 / number of preferred shares) | 1.70 | 1.30 | 1.35
Basic and diluted earnings from continuing operations per common share (B.1 / number of common shares) | R$ 1.70 | R$ 1.30 | R$ 1.35
Net income for the year from continuing operations attributed to equity holders of the parent | R$ 3,751 | R$ 2,864 | R$ 2,970
Minimum mandatory dividend from net income for the year from continuing operations – preferred shares | 1,309 | 986 | 509
Net income for the year from continuing operations not distributed – preferred shares | 1,188 | 920 | 1,468
Total earnings from continuing operations - preferred shares (A.1) | 2,497 | 1,906 | 1,977
Minimum mandatory dividend from net income for the year from continuing operations - common shares | 657 | 496 | 256
Net income for the year from continuing operations not distributed – common shares | 597 | 462 | 737
Total earnings from continuing operations - common shares (B.1) | R$ 1,254 | R$ 958 | R$ 993

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

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

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

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

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

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

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

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

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

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

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

X
- References No definition available. + Details
Name: | cig_ProfitLossFromContinuingOperations1
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- References No definition available. + Details
Name: | cig_TotalEarningsFromContinuingOperationsCommonSharesB.1
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | cig_TotalEarningsFromContinuingOperationsPreferredSharesA.1
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Basic earnings (loss) per share from continuing operations. [Refer: Basic earnings (loss) per share; Continuing operations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2021-01-01 -Paragraph 66 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=33&code=ifrs-tx-2021-en-r&anchor=para_66&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2021-01-01 -Paragraph 67 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=33&code=ifrs-tx-2021-en-r&anchor=para_67&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_BasicEarningsLossPerShareFromContinuingOperations
Namespace Prefix: | ifrs-full_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The profit (loss) from continuing operations attributable to ordinary equity holders of the parent entity. [Refer: Continuing operations [member]; Profit (loss) from continuing operations] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2021-01-01 -Paragraph 70 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=33&code=ifrs-tx-2021-en-r&anchor=para_70_a&doctype=Standard -URIDate 2021-03-24 + Details
Name: | ifrs-full_ProfitLossFromContinuingOperationsAttributableToOrdinaryEquityHoldersOfParentEntity
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | cig_ContinuingAndDiscontinuedOperationsOfShareholderAxis=cig_ContinuingOperationsOfShareholderMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |