XML 90 R69.htm IDEA: XBRL DOCUMENT
v3.21.1

28. OPERATING COSTS AND EXPENSES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Disclosure Of Operating Costs And Expenses [abstract] |
Schedule of operating costs and expenses | The operating costs are as follows:
|  | 2020 |  | 2019 (Restated) |  | 2018
Personnel (a) |  |  | 1,276 |  |  |  | 1,272 |  |  |  | 1,410 |
Employees’ and managers’ profit sharing |  |  | 142 |  |  |  | 263 |  |  |  | 77 |
Post-employment benefits (reversals) – Note 24 |  |  | 438 |  |  |  | 408 |  |  |  | 337 |
Materials |  |  | 79 |  |  |  | 91 |  |  |  | 104 |
Outsourced services (b) |  |  | 1,265 |  |  |  | 1,239 |  |  |  | 1,087 |
Energy bought for resale (c) |  |  | 12,111 |  |  |  | 11,286 |  |  |  | 11,084 |
Depreciation and amortization (1) |  |  | 989 |  |  |  | 958 |  |  |  | 835 |
Operating provisions and adjustments for operating losses (d) |  |  | 423 |  |  |  | 2,401 |  |  |  | 466 |
Charges for use of the national grid |  |  | 1,748 |  |  |  | 1,426 |  |  |  | 1,480 |
Gas bought for resale |  |  | 1,083 |  |  |  | 1,436 |  |  |  | 1,238 |
Construction costs (e) |  |  | 1,581 |  |  |  | 1,200 |  |  |  | 897 |
Other operating expenses, net (f) |  |  | 297 |  |  |  | 494 |  |  |  | 405 |
|  |  | 21,432 |  |  |  | 22,474 |  |  |  | 19,420 |
| (1) | Net of PIS/Pasep and Cofins taxes applicable to amortization of the right-of-use assets in the amount of R$2.
Schedule of outsourced services |
b) | Outsourced services
|  | 2020 |  | 2019 |  | 2018
Meter reading and bill delivery |  |  | 127 |  |  |  | 128 |  |  |  | 129 |
Communication |  |  | 71 |  |  |  | 69 |  |  |  | 80 |
Maintenance and conservation of electrical facilities and equipment |  |  | 443 |  |  |  | 404 |  |  |  | 323 |
Building conservation and cleaning |  |  | 108 |  |  |  | 110 |  |  |  | 110 |
Contracted labor |  |  | 9 |  |  |  | 17 |  |  |  | 21 |
Freight and airfares |  |  | 2 |  |  |  | 7 |  |  |  | 7 |
Accommodation and meals |  |  | 9 |  |  |  | 14 |  |  |  | 12 |
Security services |  |  | 19 |  |  |  | 18 |  |  |  | 20 |
Consultant |  |  | 41 |  |  |  | 24 |  |  |  | 16 |
Maintenance and conservation of furniture and utensils |  |  | 6 |  |  |  | 5 |  |  |  | 4 |
Information technology |  |  | 80 |  |  |  | 63 |  |  |  | 59 |
Maintenance and conservation of vehicles |  |  | 2 |  |  |  | 3 |  |  |  | 2 |
Disconnection and reconnection |  |  | 39 |  |  |  | 70 |  |  |  | 62 |
Environmental services |  |  | 10 |  |  |  | 14 |  |  |  | 14 |
Legal services |  |  | 21 |  |  |  | 28 |  |  |  | 27 |
Tree pruning |  |  | 48 |  |  |  | 46 |  |  |  | 28 |
Cleaning of power line pathways |  |  | 75 |  |  |  | 61 |  |  |  | 41 |
Copying and legal publications |  |  | 17 |  |  |  | 21 |  |  |  | 21 |
Inspection of customer units |  |  | 35 |  |  |  | 14 |  |  |  | 10 |
Other expenses |  |  | 103 |  |  |  | 123 |  |  |  | 101 |
|  |  | 1,265 |  |  |  | 1,239 |  |  |  | 1,087 |
Schedule of electricity purchased for resale |
c) | Energy purchased for resale
|  | 2020 |  | 2019 |  | 2018
Supply from Itaipu Binacional |  |  | 1,990 |  |  |  | 1,429 |  |  |  | 1,351 |
Physical guarantee quota contracts |  |  | 780 |  |  |  | 715 |  |  |  | 679 |
Quotas for Angra I and II nuclear plants |  |  | 303 |  |  |  | 269 |  |  |  | 267 |
Spot market |  |  | 1,497 |  |  |  | 1,886 |  |  |  | 1,818 |
Proinfa Program |  |  | 318 |  |  |  | 376 |  |  |  | 324 |
‘Bilateral’ contracts |  |  | 333 |  |  |  | 311 |  |  |  | 484 |
Energy acquired in Regulated Market auctions |  |  | 3,334 |  |  |  | 3,021 |  |  |  | 3,346 |
Energy acquired in the Free Market |  |  | 3,977 |  |  |  | 4,098 |  |  |  | 3,871 |
Distributed generation (‘Geração distribuída’) |  |  | 678 |  |  |  | 207 |  |  |  | — |
PIS/Pasep and Cofins credits |  |  | (1,099 | ) |  |  | (1,026 | ) |  |  | (1,056 | )
|  |  | 12,111 |  |  |  | 11,286 |  |  |  | 11,084 |
Schedule of operating provision (reversals) and adjustments for operating losses |
d) | Operating provision (reversals) and adjustments for operating losses
|  | 2020 |  | 2019 |  | 2018
Estimated losses on doubtful accounts receivables (Note 8) (1) |  |  | 147 |  |  |  | 238 |  |  |  | 264 |
Estimated losses on other accounts receivables (2) |  |  | — |  |  |  | 11 |  |  |  | (4 | )
Estimated losses on accounts receivables from related parties (3) (note 30) |  |  | 37 |  |  |  | 688 |  |  |  | — |
Contingency provisions (reversals) (Note 25) (4) |  |  |  |  |  |  |  |  |  |  |  |
Labor claims |  |  | 46 |  |  |  | 136 |  |  |  | 42 |
Civil |  |  | 43 |  |  |  | 24 |  |  |  | 13 |
Tax (5) |  |  | 75 |  |  |  | 1,228 |  |  |  | (5 | )
Other |  |  | 22 |  |  |  | 12 |  |  |  | 1 |
|  |  | 186 |  |  |  | 1,400 |  |  |  | 51 |
|  |  | 370 |  |  |  | 2,337 |  |  |  | 311 |
Adjustment for losses |  |  |  |  |  |  |  |  |  |  |  |
Put option – RME and LEPSA |  |  | — |  |  |  | — |  |  |  | 48 |
Put option – SAAG (Note 31) |  |  | 53 |  |  |  | 64 |  |  |  | 107 |
|  |  | 53 |  |  |  | 64 |  |  |  | 155 |
|  |  | 423 |  |  |  | 2,401 |  |  |  | 466 |
(1) | The expected losses on receivables are presented as selling expenses in the Statement of Income.
(2) | The estimated losses on other accounts receivable are presented in the consolidated Statement of income as operating expenses.
(3) | Estimated losses on accounts receivable from Renova, as a result of the assessment of the jointly-controlled entity credit risk.
(4) | The provisions for contingencies of the holding company are presented in the consolidated statement of income for the year as operating expenses.
(5) | The provision recognized in 2019 is due to the Company’s reassessment, based on the opinion of its legal advisers, of the probability of loss in legal actions disputing social security contributions on the payments of profit-sharing to its employees from 1999 to 2016. For more information, see note 25.
Schedule of construction cost |
e) | Construction costs
|  | 2020 |  | 2019 |  | 2018
Personnel and managers |  |  | 83 |  |  |  | 85 |  |  |  | 70 |
Materials |  |  | 775 |  |  |  | 595 |  |  |  | 379 |
Outsourced services |  |  | 598 |  |  |  | 421 |  |  |  | 364 |
Others |  |  | 125 |  |  |  | 99 |  |  |  | 84 |
|  |  | 1,581 |  |  |  | 1,200 |  |  |  | 897 |
Schedule of other operating expenses (revenues), net |
f) | Other operating expenses (revenues), net
|  | 2020 |  | 2019 (Restated) |  | 2018
Leasing and rentals |  |  | 11 |  |  |  | 20 |  |  |  | 93 |
Advertising |  |  | 7 |  |  |  | 9 |  |  |  | 19 |
Own consumption of energy |  |  | 24 |  |  |  | 21 |  |  |  | 27 |
Subsidies and donations |  |  | 22 |  |  |  | 40 |  |  |  | 22 |
Onerous concession |  |  | 3 |  |  |  | 3 |  |  |  | 3 |
Insurance |  |  | 25 |  |  |  | 12 |  |  |  | 7 |
CCEE annual charge |  |  | 6 |  |  |  | 6 |  |  |  | 6 |
Net loss (gain) on deactivation and disposal of assets |  |  | 81 |  |  |  | 88 |  |  |  | 7 |
Forluz – Administrative running cost |  |  | 30 |  |  |  | 30 |  |  |  | 28 |
Collection agents |  |  | 86 |  |  |  | 88 |  |  |  | 78 |
Obligations deriving from investment contracts (1) |  |  | 9 |  |  |  | 32 |  |  |  | — |
Taxes and charges |  |  | 7 |  |  |  | 10 |  |  |  | 9 |
Other expenses (2) |  |  | (14 | ) |  |  | 135 |  |  |  | 106 |
|  |  | 297 |  |  |  | 494 |  |  |  | 405 |
| (1) | This refers to claims under the agreement made between Aliança Geração, Vale S.A. and Cemig. The action is provisioned at the cost of R$119 (R$98 on December 31, 2019), of which Cemig is responsible for R$41 (R$32 on December 31, 2019).
| (2) | Includes the impairment loss recognized for intangible asset relating to the authorization for wind power generation granted to Volta do Rio in the amount of R$22.

X
- Definition The disclosure of construction cost. + References No definition available. + Details
Name: | cig_DisclosureOfConstructionCostExplanatory
Namespace Prefix: | cig_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of detailed information about operating costs and expenses. + References No definition available. + Details
Name: | cig_DisclosureOfDetailedInformationAboutOperatingCostsAndExpensesExplanatory
Namespace Prefix: | cig_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of electricity purchased for resale in operating costs and expenses. + References No definition available. + Details
Name: | cig_DisclosureOfElectricityPurchasedForResaleInOperatingCostsAndExpensesExplanatory
Namespace Prefix: | cig_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of operating costs and expenses. + References No definition available. + Details
Name: | cig_DisclosureOfOperatingCostsAndExpensesAbstract
Namespace Prefix: | cig_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of operating provisions reversals. + References No definition available. + Details
Name: | cig_DisclosureOfOperatingProvisionsReversalsExplanatory
Namespace Prefix: | cig_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of outsourced services. + References No definition available. + Details
Name: | cig_DisclosureOfOutsourcedServicesExplanatory
Namespace Prefix: | cig_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition The disclosure of other operating income or expense. [Refer: Other operating income (expense)] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_10_e&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_DisclosureOfOtherOperatingIncomeExpenseExplanatory
Namespace Prefix: | ifrs-full_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration