XML 104 R86.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Cash and Cash Equivalents - Additional Information (Details) | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Bottom of Range [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Accrued interest rate of return used to reflect time value of money, regulatory deferral account balances | 80.00% | 80.05%
Pre-fixed rate of return used to reflect time value of money, regulatory deferral account balances | 11.42% | 13.62%
Top of Range [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Accrued interest rate of return used to reflect time value of money, regulatory deferral account balances | 112.00% | 112.00%
Pre-fixed rate of return used to reflect time value of money, regulatory deferral account balances | 11.65% | 13.64%

X
- Definition Accrued interest rate of return used to reflect time value of money, regulatory deferral account balances. + References No definition available. + Details
Name: | cig_AccruedInterestRateOfReturnUsedToReflectTimeValueOfMoneyRegulatoryDeferralAccountBalances
Namespace Prefix: | cig_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Pre-fixed rate of return used to reflect time value of money, regulatory deferral account balances. + References No definition available. + Details
Name: | cig_PreFixedRateOfReturnUsedToReflectTimeValueOfMoneyRegulatoryDeferralAccountBalances
Namespace Prefix: | cig_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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: |