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14. ESCROW DEPOSITS (Details) - BRL (R$) R$ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Disclosure of escrow deposits [abstract] |  |  |
Labor claims |  | R$ 355 | R$ 335
Tax contingencies |  |  |
Income tax on Interest on Equity |  | 29 | 28
PIS/Pasep and Cofins taxes | [1] | 1,448 | 1,402
Donations and legacy tax (ITCD) |  | 53 | 51
Urban property tax (IPTU) |  | 79 | 87
Finsocial tax |  | 40 | 38
Income tax and social contr. tax on indemnity for employees' 'Anuenio' benefit | [2] | 282 | 275
Income tax withheld at source on inflationary profit |  | 9 | 8
Contribution tax effective rate | [3] | 18 | 18
ICMS (VAT) credits on PP&E |  | 39 | 38
Others | [4] | 92 | 118
Escrow deposits tax issues |  | 2,089 | 2,063
Others |  |  |
Regulatory |  | 43 | 53
Third party |  | 11 | 9
Customer relations |  | 7 | 6
Court embargo |  | 12 | 12
Others |  | 23 | 24
Escrow deposits other |  | 96 | 104
Long term escrow deposit |  | R$ 2,540 | R$ 2,502
[1] | This refers to escrow deposits in the action challenging the constitutionality of inclusion of ICMS value added tax within the taxable amount for calculation of PIS/Pasep and Cofins taxes. On February 13, 2020 Company's wholly-owned subsidiaries Cemig D and Cemig GT escrow deposits were released, totaling R$1,382, comprising monetary update. The expectation is that the escrow deposits from the others wholly-owned subsidiaries will be received as their judicial claims reach the final judgement. See more details in Note 10 - PIS/Pasep and Cofins taxes credits over ICMS - Final court judgement.
[2] | See more details in Note 27 - Provisions under the section relating to the 'Anuenio indemnity'.
[3] | Escrow deposit in the legal action challenging an infringement claim relating to application of social contribution tax to amounts of cultural and artistic donations and sponsorship, expenses on punitive fines, and taxes with liability suspended.
[4] | Includes escrow deposits from legal actions related to INSS and PIS/Pasep and Cofins taxes

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- Definition Represent information about the contribution tax effective rate1. + References No definition available. + Details
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- Definition Court embargo escrow deposits. + References No definition available. + Details
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- Definition Customer relations escrow deposits. + References No definition available. + Details
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- Definition Disclosure of information about escrow deposits. + References No definition available. + Details
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- Definition Donations and legacy tax. + References No definition available. + Details
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- Definition Escrow deposits labor claims. + References No definition available. + Details
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- Definition Escrow deposits other. + References No definition available. + Details
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- Definition Disclosure of information about escrow deposits other. + References No definition available. + Details
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- Definition Escrow deposits other tax issues. + References No definition available. + Details
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- Definition Disclosure of information about escrow deposits tax contingencies. + References No definition available. + Details
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- Definition Escrow deposits tax issues. + References No definition available. + Details
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- Definition Finsocial tax. + References No definition available. + Details
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- Definition Represent information about the icms vat credits on ppe. + References No definition available. + Details
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Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Income And Social Contribution Tax On Indemnity For Employees Anuenio Benefit + References No definition available. + Details
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- Definition Income tax on interest on equity. + References No definition available. + Details
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- Definition Represent information about the income tax withheld at source on inflationary profit1. + References No definition available. + Details
Name: | cig_IncomeTaxWithheldAtSourceOnInflationaryProfit1
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
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- Definition Long term escrow deposit. + References No definition available. + Details
Name: | cig_LongTermEscrowDeposit
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Other escrow deposits. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Pasep and cofins tax. + References No definition available. + Details
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- Definition Regulatory escrow deposits. + References No definition available. + Details
Name: | cig_RegulatoryEscrowDeposits
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Third party escrow deposits. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Urban property tax. + References No definition available. + Details
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Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant