XML 128 R189.htm IDEA: XBRL DOCUMENT
v3.20.1

28. EQUITY AND REMUNERATION TO SHAREHOLDERS (Details Narrative) - BRL (R$) R$ / shares in Units, R$ in Millions |  | 12 Months Ended
--- | --- | ---
Apr. 23, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Share capital |  | R$ 7,294 | R$ 7,294 | R$ 7,294
Number of shares issued | 199,910,947 | 1,258,841,654 | 1,458,752,601 | 1,258,841,654
Nominal Value | R$ 5.00 | R$ 5.00 |  |
Net profit share |  | R$ 2,834 |  |
Dividend paid |  | R$ 1,564 |  |
Percentage of dividend distributed |  | 50.00% |  |
Unrealized profit reserve |  | R$ 835 | R$ 835 |
Percentage of right to reduction in income tax |  | 75.00% |  |
Period of right to reduction in income tax |  | 10 years |  |
Right to reduction in income tax, starting period |  | 2014 |  |
Amount of incentive recognized in statement of income |  | R$ 18 | 9 | R$ 1
Tax incentives reserve |  | R$ 85 | 67 | 58
Minimum percentage right to appoint board member |  | 10.00% |  |
Mandatory dividends payout percentage |  | 50.00% |  |
Percentage of dividend on portion of equity |  | 3.00% |  |
Percentage of dividend on par value |  | 10.00% |  |
Net income (loss) for the year |  | R$ 3,128 | 1,742 | 1,002
Realization of the deemed cost of PP&E |  | 25 |  |
Minimum mandatory dividend payable |  | 764 |  |
Interest on equity |  | 400 |  |
Dividend payable |  | 364 |  |
Retained earnings reserve |  | 1,535 |  |
Incentives tax reserve |  | 18 |  |
Profit reserve exceed share capital |  | 537 |  |
Increase in share capital | R$ 1,000 | R$ 7,594 |  |
Description of shares held by private individuals |  | Shares held by private individuals and issued up to August 5, 2004 have the right to a minimum dividend of 6% per year on their par value in all years. |  |
Subscribed paid up capital |  | R$ 1,325 |  |
Capital reserve |  | R$ 2,250 | R$ 2,250 | R$ 1,925
Bottom Of Range [Member] |  |  |  |
Increase in share capital | 6,294 |  |  |
Top of Range [Member] |  |  |  |
Percentage of increase in share capital |  | 10.00% |  |
Increase in share capital | R$ 7,294 |  |  |
Common Shares [Member] |  |  |  |
Number of shares issued | 199,910,947 | 487,614,213 | 487,614,213 |
Nominal Value |  | R$ 5.00 | R$ 5.00 |
Minimum percentage for multiple vote procedure |  | 5.00% |  |
Minimum percentage right to appoint board member |  | 15.00% |  |
Preferred Shares [Member] |  |  |  |
Number of shares issued | 199,910,947 | 971,138,388 | 971,138,388 | 838,076,946
Nominal Value |  | R$ 5.00 | R$ 5.00 |
Minimum percentage right to appoint board member |  | 10.00% |  |
Preferred Shares [Member] | Bottom Of Range [Member] |  |  |  |
Dividend paid |  | R$ 486 |  |

X
- Definition The amount refers to amount of incentive recognized in statement of income. + References No definition available. + Details
Name: | cig_AmountOfIncentiveRecognizedInStatementOfIncome
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Description of shares held by private individuals. + References No definition available. + Details
Name: | cig_DescriptionOfSharesHeldByPrivateIndividuals
Namespace Prefix: | cig_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount refers to incentives tax reserve. + References No definition available. + Details
Name: | cig_IncentivesTaxReserve
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount refers to increase in share capital. + References No definition available. + Details
Name: | cig_IncreaseInShareCapital
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount refers to interest on equity. + References No definition available. + Details
Name: | cig_InterestOnEquity
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Minimum obligatory dividend payable. + References No definition available. + Details
Name: | cig_MinimumObligatoryDividendPayable
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Minimum obligatory dividend pay-out as percentage of net profit. + References No definition available. + Details
Name: | cig_MinimumObligatoryDividendPayoutAsPercentageOfNetProfit
Namespace Prefix: | cig_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum percentage for multiple vote procedure. + References No definition available. + Details
Name: | cig_MinimumPercentageForMultipleVoteProcedure
Namespace Prefix: | cig_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum percentage, right to appoint determined number of board members. + References No definition available. + Details
Name: | cig_MinimumPercentageRightToAppointDeterminedNumberOfBoardMembers
Namespace Prefix: | cig_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount refers to net profit share. + References No definition available. + Details
Name: | cig_NetProfitShare
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Information about percentage of dividend distributed. + References No definition available. + Details
Name: | cig_PercentageOfDividendDistributed
Namespace Prefix: | cig_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Information about percentage of dividend on par value. + References No definition available. + Details
Name: | cig_PercentageOfDividendOnParValue
Namespace Prefix: | cig_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Information about percentage of dividend on portion of equity. + References No definition available. + Details
Name: | cig_PercentageOfDividendOnPortionOfEquity
Namespace Prefix: | cig_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Information about percentage of increase in share capital. + References No definition available. + Details
Name: | cig_PercentageOfIncreaseInShareCapital
Namespace Prefix: | cig_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Information about percentage of right to reduction in income tax. + References No definition available. + Details
Name: | cig_PercentageOfRightToReductionInIncomeTax
Namespace Prefix: | cig_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represent information about the profit reserve exceed share capital. + References No definition available. + Details
Name: | cig_ProfitReserveExceedShareCapital
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Realization of deemed cost of property, plant and equipment. + References No definition available. + Details
Name: | cig_RealizationOfTheDeemedCostOfPropertyPlantAndEquipment
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represent information about the retained earnings reserve1. + References No definition available. + Details
Name: | cig_RetainedEarningsReserve1
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Right to reduction in income tax starting period. + References No definition available. + Details
Name: | cig_RightToReductionInIncomeTaxStartingPeriod
Namespace Prefix: | cig_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Right to reduction in income tax period. + References No definition available. + Details
Name: | cig_RightToReductionsInIncomeTaxPeriod
Namespace Prefix: | cig_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amoun of subscribed paid up capital. + References No definition available. + Details
Name: | cig_SubscribedPaidUpCapital
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Tax incentives reserve. + References No definition available. + Details
Name: | cig_TaxIncentivesReserve
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount refers to unrealized profit reserve. + References No definition available. + Details
Name: | cig_UnrealizedProfitReserve
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition A component of equity representing the capital reserves. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_CapitalReserve
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of dividends that the company has declared but not yet paid. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_DividendPayables
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of dividends paid by the entity on shares other than ordinary shares. [Refer: Ordinary shares [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 34 -IssueDate 2019-01-01 -Paragraph 16A -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=34&code=ifrs-tx-2019-en-r&anchor=para_16A_f&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_DividendsPaidOtherShares
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The nominal value of capital issued. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 78 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_78_e&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_IssuedCapital
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The number of shares issued by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 106 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_106_d&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_NumberOfSharesIssued
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The nominal value per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 79 -Subparagraph a -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_79_a_iii&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ParValuePerShare
Namespace Prefix: | ifrs-full_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The total of income less expenses from continuing and discontinued operations, excluding the components of other comprehensive income. [Refer: Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2019-01-01 -Paragraph 18 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&anchor=para_18_b&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 1 -IssueDate 2019-01-01 -Paragraph 24 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2019-en-r&anchor=para_24_b&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 1 -IssueDate 2019-01-01 -Paragraph 32 -Subparagraph a -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2019-en-r&anchor=para_32_a_ii&doctype=Standard -URIDate 2019-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2019-01-01 -Paragraph 28 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_28_b&doctype=Standard -URIDate 2019-03-27 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Note Effective on first application of IFRS 9 -Name IFRS -Number 4 -IssueDate 2019-01-01 -Paragraph 39L -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=4&code=ifrs-tx-2019-en-b&anchor=para_39L_e&doctype=Standard -URIDate 2019-03-27 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2019-01-01 -Paragraph 23 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2019-en-r&anchor=para_23&doctype=Standard -URIDate 2019-03-27 Reference 7: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 12 -IssueDate 2019-01-01 -Paragraph B10 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_B10_b&doctype=Appendix&subtype=B -URIDate 2019-03-27 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 106 -Subparagraph d -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_106_d_i&doctype=Standard -URIDate 2019-03-27 Reference 9: http://www.xbrl.org/2003/role/exampleRef -Note Effective 2021-01-01 -Name IFRS -Number 17 -IssueDate 2019-01-01 -Paragraph 113 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2019-en-r&anchor=para_113_b&doctype=Standard -URIDate 2019-03-27 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 81A -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_81A_a&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ProfitLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_OrdinarySharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_PreferenceSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |