XML 245 R227.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Financial Instruments and Risk Management - Schedule of Risk of Increase In Inflation (Details) - BRL (R$) R$ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Assets |  |  |
Concession financial assets related to Distribution infrastructure - IPCA | R$ 1,920 | R$ 1,407 |
Concession Grant Fee - IPCA (Note 14) | 3,031 | 2,950 |
Asset | 4,951 | 4,357 |
Liabilities |  |  |
Loans, financing and debentures - IPCA and IGP-DI (Note 22) | (4,522) | (4,630) |
Debt with pension fund (Forluz) - IPCA (Note 24) | (90) | (251) |
Deficit of pension plan (Forluz) - IPCA (Note 24) | (521) | (545) |
Leasing liabilities | (433) | (354) | R$ (244)
Liability | (5,566) | (5,780) |
Net assets exposed | R$ (615) | R$ (1,423) |

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

X
- Definition The amount of concession financial assets related to Distribution infrastructure IPCA. + References No definition available. + Details
Name: | cig_ConcessionFinancialAssetsRelatedToDistributionInfrastructureIpca
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount fo concession Grant Fee &amp;amp;amp;#8211; IPCA. + References No definition available. + Details
Name: | cig_ConcessionGrantFeeIpca
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of debt with pension fund. + References No definition available. + Details
Name: | cig_DebtWithPensionFund
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition THer amount of deficit of pension plan. + References No definition available. + Details
Name: | cig_DeficitOfPensionPlanForluzIpca
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition The amount of loans, financing and debentures. + References No definition available. + Details
Name: | cig_LoansFinancingAndDebentures
Namespace Prefix: | cig_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2023-01-01 -Paragraph 47 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_47_b&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_LeaseLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition The amount of assets less the amount of liabilities. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 1 -IssueDate 2023-01-01 -Paragraph IG63 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=1&code=ifrs-tx-2023-en-r&anchor=para_IG63&doctype=Implementation%20Guidance -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard -URIDate 2023-03-23 + Details
Name: | ifrs-full_NetAssetsLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant