XML 75 R54.htm IDEA: XBRL DOCUMENT
v3.25.1

Concession Contract Assets (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Concession Contract Assets |
Schedule of Detailed Information about Concession Contract Assets |
| Dec. 31, 2024 |  | Dec. 31, 2023
Distribution – Infrastructure assets under construction | 4,421 |  | 3,431
Gas – Infrastructure assets under construction | 554 |  | 338
Transmission – National Grid (‘BNES’ - Basic Network of the Existing System) - Law 12,783/13 | 1,616 |  | 1,723
Transmission – Assets remunerated by tariff | 4,876 |  | 3,034
| 11,467 |  | 8,526
Current | 1,140 |  | 850
Non-current | 10,327 |  | 7,676
Schedule of Contract Assets |
| Transmission |  | Distribution |  | Gas |  | Total
Balances on December 31, 2021 | 4,358 |  | 1,927 |  | 95 |  | 6,380
Additions | 407 |  | 3,098 |  | 61 |  | 3,566
Inflation adjustment | 575 |  | - |  | - |  | 575
Amounts received | (608) |  | - |  | - |  | (608)
Disposals | - |  | - |  | (3) |  | (3)
Other additions | 5 |  | - |  | - |  | 5
Transfers to financial assets | - |  | (762) |  | - |  | (762)
Transfers to intangible assets | - |  | (2,412) |  | (36) |  | (2,448)
Impairment (1) | - |  | (1) |  | - |  | (1)
Balances on December 31, 2022 | 4,737 |  | 1,850 |  | 117 |  | 6,704
Additions | 242 |  | 3,478 |  | 270 |  | 3,990
Inflation adjustment | 524 |  | - |  | - |  | 524
Amounts received | (746) |  | - |  | - |  | (746)
Transfers to financial assets | - |  | (364) |  | - |  | (364)
Transfers to intangible assets | - |  | (1,541) |  | (49) |  | (1,590)
Impairment (1) | - |  | 8 |  | - |  | 8
Balances on December 31, 2023 | 4,757 |  | 3,431 |  | 338 |  | 8,526
Additions (2) | 425 |  | 4,167 |  | 348 |  | 4,940
Inflation adjustment | 433 |  | - |  | - |  | 433
Amounts received | (799) |  | - |  | - |  | (799)
Results of the Periodic Tariff Review (3) | 1,676 |  | - |  | - |  | 1,676
Transfers to financial assets | - |  | (731) |  | (51) |  | (782)
Transfers to intangible assets | - |  | (2,435) |  | (81) |  | (2,516)
Impairment (1) | - |  | (11) |  | - |  | (11)
Balances on December 31, 2024 | 6,492 |  | 4,421 |  | 554 |  | 11,467
(1) | This refers to posting or reversal of provisions made for losses in relation to contractual assets in progress (canceled works).
(2) | The higher volume of additions in the distribution segment reflects greater investments made, in line with the investment program of Cemig D.
(3) | In Note 27d, this amount is presented net of PIS/Pasep and Cofins taxes.
Schedule of Service Concession Arrangements |
| Update index | Dec. 31, 2024 |  | Dec. 31, 2023
Current |  |  |  |
Concession contract - 006/97 (a) | IPCA |  |  |
National Grid (‘BNES’ - Basic Network of the Existing System) |  | 479 |  | 466
National Grid - new facilities (RBNI) |  | 595 |  | 302
Concession contract - 079/00 (b) | IGPM | 39 |  | 45
Concession contract - 006/11 (c) | IGPM | 18 |  | 28
Concession contract - 004/05 (d) | IPCA | 9 |  | 9
|  | 1,140 |  | 850
Non-current |  |  |  |
Concession contract - 006/97 (a) | IPCA |  |  |
National Grid (‘BNES’ - Basic Network of the Existing System) |  | 1,137 |  | 1,257
National Grid - new facilities (RBNI) |  | 3,892 |  | 2,358
Concession contract - 079/00 (b) | IGPM | 110 |  | 118
Concession contract - 006/11 (c) | IGPM | 107 |  | 74
Concession contract - 004/05 (d) | IPCA | 105 |  | 100
|  | 5,351 |  | 3,907
|  | 6,491 |  | 4,757
Schedule of Periodic Tariff Review |
Result RTP |
RBSE - Assets until 12/2012 | 164
RBNI Cycle 2013-2018 - Original | 10
RBNI Cycle 2013-2018 - Revised RTP 2024 | 89
RBNI Cycle 2018-2023 – Small Improvements | 205
RBNI Cycle 2018-2023 – Major Improvements and Reinforcements | 1,208
Total | 1,676

X
- Definition Disclosure Concession Contract Assets Abstract + References No definition available. + Details
Name: | cig_DisclosureConcessionContractAssetsAbstract
Namespace Prefix: | cig_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure Of Detailed Information About Contract Assets Explantory + References No definition available. + Details
Name: | cig_DisclosureOfDetailedInformationAboutContractAssetsExplantory
Namespace Prefix: | cig_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure Of Movement In Contract Assets Explanatory + References No definition available. + Details
Name: | cig_DisclosureOfMovementInContractAssetsExplanatory
Namespace Prefix: | cig_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular discosure of periodic tariff review. + References No definition available. + Details
Name: | cig_DisclosureOfPeriodicTariffReviewTableTextblock
Namespace Prefix: | cig_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of transmission concessions, the consideration to be paid to the entity arising from the concession contracts. + References No definition available. + Details
Name: | cig_DisclosureOfServiceConcessionArrangementsTableTextblock
Namespace Prefix: | cig_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration