XML 257 R236.htm IDEA: XBRL DOCUMENT
v3.25.1

Subsequent Events - Additional Information (Details) |  |  |  |  |  |  |  | 12 Months Ended |  |  |  |  |  |  |
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Apr. 11, 2025 BRL (R$) Number shares | Apr. 09, 2025 BRL (R$) Number shares | Mar. 31, 2025 BRL (R$) | Mar. 18, 2025 BRL (R$) shares | Feb. 26, 2025 BRL (R$) kV | Feb. 21, 2025 BRL (R$) shares | Dec. 27, 2024 BRL (R$) shares | Dec. 31, 2024 BRL (R$) R$ / shares shares | Dec. 31, 2023 BRL (R$) shares | Mar. 20, 2025 BRL (R$) | Jan. 24, 2025 | Sep. 27, 2024 BRL (R$) | Apr. 29, 2024 shares | Mar. 27, 2024 | Feb. 29, 2024 BRL (R$) | Dec. 31, 2022 BRL (R$)
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current subsidy receivable |  |  |  |  |  |  |  | R$ 208,000,000 | R$ 196,000,000 |  |  |  |  |  | R$ 101,000,000 |
Share capital |  |  |  |  |  |  |  | 14,309,000,000 | 11,007,000,000 |  |  |  |  |  |  |
Profit reserve exceed share capital |  |  |  |  |  |  |  |  | 986,000,000 |  |  |  |  |  |  |
Future earnings reserve share capital |  |  |  |  |  |  |  |  | 11,993,000,000 |  |  |  |  |  |  |
Capital reserves |  |  |  |  |  |  |  | 393,000,000 | R$ 2,250,000,000 |  |  |  |  |  |  | R$ 2,250,000,000
Retained earnings reserve |  |  |  |  |  |  |  | R$ 1,445,000,000 |  |  |  |  |  |  |  |
Issuance of shares | shares |  |  |  |  |  |  |  | 2,861,781,895 | 2,201,370,688 |  |  |  | 660,411,207 |  |  |
Par value | R$ / shares |  |  |  |  |  |  |  | R$ 5 |  |  |  |  |  |  |  |
Interest on equity |  |  |  |  |  |  |  | R$ 1,849,000,000 | R$ 2,592,000,000 |  |  |  |  |  |  | R$ 1,983,000,000
Debentures shares | shares |  |  |  |  |  |  | 200,000 |  |  |  |  |  |  |  |  |
Debenture |  |  |  |  |  |  | R$ 200,000,000 |  |  |  |  |  |  |  |  |
Permitted Annual Revenue |  |  |  |  |  |  |  | R$ 17,000,000 |  |  |  |  |  |  |  |
Principal amount |  |  |  |  |  |  | R$ 200,000,000 |  |  |  |  | R$ 2,436,000,000 |  |  |  |
Urban Market [Member] | Minimum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of average adjustments of consumer rates |  |  |  |  |  |  |  |  |  |  | 5.34% |  |  |  |  |
Urban Market [Member] | Maximum [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of average adjustments of consumer rates |  |  |  |  |  |  |  |  |  |  | 6.17% |  |  |  |  |
Ordinary shares [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of shares | shares |  |  |  |  |  |  |  | 220,754,287 |  |  |  |  |  |  |  |
Par value | R$ / shares |  |  |  |  |  |  |  | R$ 5 |  |  |  |  |  |  |  |
Preference shares [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Issuance of shares | shares |  |  |  |  |  |  |  | 1,905,179,984 | 1,465,523,064 |  |  |  | 439,656,920 |  |  |
Events After Reporting Period [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Actuarial assumption of discount rates |  |  | 12.32% |  |  |  |  |  |  |  |  |  |  |  |  |
Events After Reporting Period [Member] | Unsecured Debentures Tenth Issue Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debentures shares | shares |  |  |  | 625,000 |  |  |  |  |  |  |  |  |  |  |  |
Debenture |  |  |  | R$ 625,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Events After Reporting Period [Member] | Health plan [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Past service cost |  |  | R$ 27,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Actuarial gain |  |  | 59,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Events After Reporting Period [Member] | Dental plan [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Past service cost |  |  | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Actuarial gain |  |  | R$ 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Major business combination [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Transmission facility capacity | kV |  |  |  |  | 230 |  |  |  |  |  |  |  |  |  |  |
Declaration Of Interest On Equity Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest on equity |  |  |  |  |  |  |  |  |  | R$ 541,006 |  |  |  |  |  |
Cemiggt [Member] | Events After Reporting Period [Member] | Unsecured Debentures Tenth Issue Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debentures shares | shares |  |  |  | 625,000 |  | 500,000 |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  | R$ 625,000,000 |  | R$ 500,000,000 |  |  |  |  |  |  |  |  |  |
Cemiggt [Member] | Major business combination [member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate value of acquisition |  |  |  |  | R$ 30,000,000 |  |  |  |  |  |  |  |  |  |  |
Permitted Annual Revenue |  |  |  |  | R$ 5,700,000 |  |  |  |  |  |  |  |  |  |  |
Alianca Energia SA [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity interest |  |  |  |  |  |  |  |  |  |  |  |  |  | 45.00% |  |
Cemig D [Member] | Events After Reporting Period [Member] | Unsecured Debentures Twelth Issue Series 2 Member |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount |  |  |  | R$ 2,500,000,000 |  | R$ 2,000,000,000 |  |  |  |  |  |  |  |  |  |
Cemig D [Member] | Events After Reporting Period [Member] | Unsecured Debentures 13th Issue [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debentures issued | shares |  | 1,895,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cemig D [Member] | Major business combination [member] | Unsecured Debentures 13th Issue [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disclosure of non-adjusting events after reporting period [line items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debentures issued | shares | 1,895,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Principal amount | R$ 1,895,000,000 | R$ 2,000,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nominal amount per unit of debt instrument |  | R$ 1,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of series of debt instrument issued | Number | 2 | 2 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [domain]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 144 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_144&doctype=Standard -URIDate 2024-03-27 + Details
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