XML 131 R110.htm IDEA: XBRL DOCUMENT v3.25.1

Concession Contract Assets - Schedule of Contract Assets (Details) - BRL (R$)
R$ in Millions

12 Months Ended

Dec. 31, 2024

Dec. 31, 2023

Dec. 31, 2022

IfrsStatementLineItems [Line Items]

Balances

R$ 8,526

R$ 6,704

R$ 6,380

Additions

4,940

3,990

3,566

Inflation adjustment

433

524

575

Results of the Periodic Tariff Review

1,676

Amounts received

(799)

(746)

(608)

Disposals

(3)

Others additions

5

Transfers to financial assets

(782)

(364)

(762)

Transfers to intangible assets

(2,516)

(1,590)

(2,448)

Impairment

(11)

(8)

(1)

Balances

11,467

8,526

6,704

Transmission Segment [Member]

IfrsStatementLineItems [Line Items]

Balances

4,757

4,737

4,358

Additions

425

^[1]

242

407

Inflation adjustment

433

524

575

Results of the Periodic Tariff Review

^[2]

1,676

Amounts received

(799)

(746)

(608)

Disposals

Others additions

5

Transfers to financial assets

Transfers to intangible assets

Impairment

^[3]

Balances

6,492

4,757

4,737

Distribution Segment [Member]

IfrsStatementLineItems [Line Items]

Balances

3,431

1,850

1,927

Additions

4,167

3,478

3,098

Inflation adjustment

Results of the Periodic Tariff Review

Amounts received

Disposals

Others additions

Transfers to financial assets

(731)

(364)

(762)

Transfers to intangible assets

(2,435)

(1,541)

(2,412)

Impairment

(11)

(8)

(1)

Balances

4,421

3,431

1,850

Gas And Power Segment [Member]

IfrsStatementLineItems [Line Items]

Balances

338

117

95

Additions

348

270

61

Inflation adjustment

Results of the Periodic Tariff Review

Amounts received

Disposals

(3)

Others additions

Transfers to financial assets

(51)

Transfers to intangible assets

(81)

(49)

(36)

Impairment

Balances

R$ 554

R$ 338

R$ 117

[1]	The higher volume of additions in the distribution segment reflects greater investments made, in line with the investment program of Cemig D.
[2]	In Note 27d, this amount is presented net of PIS/Pasep and Cofins taxes.
[3]	This refers to posting or reversal of provisions made for losses in relation to contractual assets in progress (canceled works).

X

- Definition

Contract assets amounts received.

+ References

No definition available.

+ Details

Name:	cig_ContractAssetsAmountsReceived
Namespace Prefix:	cig_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount refers to disposal.

+ References

No definition available.

+ Details

Name:	cig_Disposals
Namespace Prefix:	cig_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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

Increase (decrease) through transfers to financial assets

+ References

No definition available.

+ Details

Name:	cig_IncreaseDecreaseThroughTransfersToFinancialAssets
Namespace Prefix:	cig_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Increase (decrease) through transfers to intangible assets

+ References

No definition available.

+ Details

Name:	cig_IncreaseDecreaseThroughTransfersToIntangibleAssets
Namespace Prefix:	cig_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Inflation adjustment.

+ References

No definition available.

+ Details

Name:	cig_InflationAdjustment
Namespace Prefix:	cig_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Others Additions

+ References

No definition available.

+ Details

Name:	cig_OthersAdditions
Namespace Prefix:	cig_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Provisions For Impairment Loss

+ References

No definition available.

+ Details

Name:	cig_ProvisionsForImpairmentLoss
Namespace Prefix:	cig_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represent information about the results of periodic tariff revision.

+ References

No definition available.

+ Details

Name:	cig_ResultsOfPeriodicTariffRevision
Namespace Prefix:	cig_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of additions to non-current assets other than financial instruments, deferred tax assets, net defined benefit assets and rights arising under insurance contracts. [Refer: Deferred tax assets; Classes of financial instruments [domain]; Non-current assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2024-01-01
-Paragraph 28
-Subparagraph e
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_28_e&doctype=Standard
-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2024-01-01
-Paragraph 24
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2024-en-r&anchor=para_24_b&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_AdditionsToNoncurrentAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of an entity’s right to consideration in exchange for goods or services that the entity has transferred to a customer, when that right is conditioned on something other than the passage of time (for example, the entity’s future performance).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2024-01-01
-Paragraph 105
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_105&doctype=Standard
-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 15
-IssueDate 2024-01-01
-Paragraph 116
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2024-en-r&anchor=para_116_a&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_ContractAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	ifrs-full_SegmentsAxis=cig_TransmissionSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SegmentsAxis=cig_DistributionSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_SegmentsAxis=cig_GasAndPowerSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: