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Operating Costs and Expenses | 12 Months Ended
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Dec. 31, 2017
Analysis of income and expense [abstract] |
Operating Costs and Expenses |
27. | OPERATING COSTS AND EXPENSES
|  | 2017 |  |  | 2016 |  |  | 2015 |
Personnel (a) |  |  | 1,627 |  |  |  | 1,643 |  |  |  | 1,435 |
Employees’ and managers’ profit sharing |  |  | 5 |  |  |  | 7 |  |  |  | 137 |
Post-retirement benefits – Note 23 |  |  | (229 | ) |  |  | 345 |  |  |  | 156 |
Materials |  |  | 61 |  |  |  | 58 |  |  |  | 154 |
Raw materials and inputs for production of energy |  |  | 10 |  |  |  | — |  |  |  | — |
Outsourced services (b) |  |  | 974 |  |  |  | 867 |  |  |  | 899 |
Energy bought for resale (c) |  |  | 10,919 |  |  |  | 8,273 |  |  |  | 9,542 |
Depreciation and amortization |  |  | 850 |  |  |  | 834 |  |  |  | 835 |
Operating provisions (d) |  |  | 854 |  |  |  | 704 |  |  |  | 1,401 |
Charges for use of the national grid |  |  | 1,174 |  |  |  | 947 |  |  |  | 999 |
Gas bought for resale |  |  | 1,071 |  |  |  | 878 |  |  |  | 1,051 |
Construction costs (e) |  |  | 1,119 |  |  |  | 1,193 |  |  |  | 1,252 |
Other operating expenses, net (f) |  |  | 383 |  |  |  | 155 |  |  |  | 426 |
|  |  | 18,818 |  |  |  | 15,904 |  |  |  | 18,287 |
a) | Personnel expenses
Programmed Voluntary Retirement Plan (PDVP) In March 2017, the Company approved the 2017 Employee Voluntary Severance Program (‘the 2017 PDVP’). Those eligible to take part were any employees who have worked with Cemig for 25 years or more by December 31, 2017. The period for acceptance of the 2017 PDVP was April 3 2017, through October 17, 2017. It provided for payment of an additional premium of five monthly salaries to employees who joined in April 2017, and resigned the Company in May 2017. The premium diminished progressively depending on the month of acceptance. Thus, for employees who adhered to the program only in August 2017, for voluntary retirement in September 2017, the corresponding premium payment was only one month’s salary. For those who joined as from September 1, 2017, there was no premium. The program also paid the standard legal severance payments – including: payment for the period of notice, and especially, an amount equal to the ‘penalty’ payment of 40% of the Base Value of the employee’s FGTS fund, as well as the other payments specified by the legislation. On December 31, 2017 the amount appropriated as expense for the 2017 PDVP, including severance amounts, was R$ 214 , corresponding to acceptance, up to that date, by 1,189 employees. In 2016, the amount appropriated to Personnel as expense on the PDVP in effect at that time was R$ 93.
b) | Outsourced services
|  | 2017 |  |  | 2016 |  |  | 2015 |
Meter reading and bill delivery |  |  | 142 |  |  |  | 140 |  |  |  | 122 |
Communication |  |  | 66 |  |  |  | 55 |  |  |  | 64 |
Maintenance and conservation of electrical facilities and equipment |  |  | 266 |  |  |  | 246 |  |  |  | 238 |
Building conservation and cleaning |  |  | 108 |  |  |  | 97 |  |  |  | 100 |
Contracted labor |  |  | 15 |  |  |  | 13 |  |  |  | 6 |
Freight and airfares |  |  | 8 |  |  |  | 7 |  |  |  | 10 |
Accommodation and meals |  |  | 13 |  |  |  | 13 |  |  |  | 17 |
Security services |  |  | 23 |  |  |  | 25 |  |  |  | 28 |
Consultancy |  |  | 16 |  |  |  | 15 |  |  |  | 17 |
Maintenance and conservation of furniture and utensils |  |  | 4 |  |  |  | 4 |  |  |  | 4 |
Information technology |  |  | 62 |  |  |  | 49 |  |  |  | 42 |
Maintenance and conservation of vehicles |  |  | 2 |  |  |  | 8 |  |  |  | 11 |
Disconnection and reconnection |  |  | 35 |  |  |  | 7 |  |  |  | 26 |
Environment |  |  | 11 |  |  |  | 19 |  |  |  | 22 |
Legal services |  |  | 22 |  |  |  | 26 |  |  |  | 21 |
Legal procedural costs |  |  | 3 |  |  |  | 4 |  |  |  | 3 |
Tree pruning |  |  | 21 |  |  |  | 14 |  |  |  | 23 |
Cleaning of power line pathways |  |  | 16 |  |  |  | 8 |  |  |  | 30 |
Copying and legal publications |  |  | 23 |  |  |  | 16 |  |  |  | 14 |
Inspection of customer units |  |  | 1 |  |  |  | 1 |  |  |  | 4 |
Printing of tax invoices and energy bills |  |  | 3 |  |  |  | 3 |  |  |  | 4 |
Other expenses |  |  | 114 |  |  |  | 97 |  |  |  | 93 |
|  |  | 974 |  |  |  | 867 |  |  |  | 899 |
c) | Energy purchased for resale
|  | 2017 |  |  | 2016 |  |  | 2015 |
Supply from Itaipu Binacional |  |  | 1,243 |  |  |  | 1,144 |  |  |  | 1,734 |
Physical guarantee quota contracts |  |  | 461 |  |  |  | 537 |  |  |  | 252 |
Quotas for Angra I and II nuclear plants |  |  | 244 |  |  |  | 217 |  |  |  | 200 |
Spot market |  |  | 1,498 |  |  |  | 761 |  |  |  | 935 |
Proinfa Program |  |  | 303 |  |  |  | 323 |  |  |  | 253 |
‘Bilateral’ contracts |  |  | 385 |  |  |  | 292 |  |  |  | 326 |
Energy acquired in Regulated Market auctions |  |  | 3,555 |  |  |  | 2,540 |  |  |  | 3,978 |
Energy acquired in the Free Market |  |  | 4,283 |  |  |  | 3,279 |  |  |  | 2,762 |
Pasep and Cofins credits |  |  | (1,053 | ) |  |  | (820 | ) |  |  | (898 | )
|  |  | 10,919 |  |  |  | 8,273 |  |  |  | 9,542 |
d) | Operating provisions (reversals)
|  | 2017 |  |  | 2016 |  |  | 2015 |
Estimated losses on doubtful receivables |  |  | 248 |  |  |  | 382 |  |  |  | 175 |
Estimated losses on other accounts receivables |  |  | 27 |  |  |  | 40 |  |  |  | — |
Contingency provisions (reversals) |  |  |  |  |  |  |  |  |  |  |  |
Labor claims |  |  | 206 |  |  |  | 120 |  |  |  | 4 |
Civil |  |  | 27 |  |  |  | 30 |  |  |  | 22 |
Tax |  |  | 7 |  |  |  | 2 |  |  |  | (4 | )
Environmental |  |  | — |  |  |  | — |  |  |  | (1 | )
Regulatory |  |  | (3 | ) |  |  | — |  |  |  | 10 |
Other |  |  | (6 | ) |  |  | 31 |  |  |  | (3 | )
|  |  | 231 |  |  |  | 183 |  |  |  | 28 |
|  |  | 506 |  |  |  | 605 |  |  |  | 203 |
Adjustment for losses |  |  |  |  |  |  |  |  |  |  |  |
Put option – Parati (Note 30) |  |  | 231 |  |  |  | 55 |  |  |  | 1,079 |
Put option – SAAG (Note 30) |  |  | 116 |  |  |  | 49 |  |  |  | 119 |
Put option – Sonda (Note 30) |  |  | 1 |  |  |  | (5 | ) |  |  | — |
|  |  | 348 |  |  |  | 99 |  |  |  | 1,198 |
|  |  | 854 |  |  |  | 704 |  |  |  | 1,401 |
| e) | Construction cost
|  | 2017 |  |  | 2016 |  |  | 2015 |
Personnel and managers |  |  | 36 |  |  |  | 58 |  |  |  | 65 |
Materials |  |  | 550 |  |  |  | 534 |  |  |  | 521 |
Outsourced services |  |  | 406 |  |  |  | 448 |  |  |  | 504 |
Others |  |  | 127 |  |  |  | 153 |  |  |  | 162 |
|  |  | 1,119 |  |  |  | 1,193 |  |  |  | 1,252 |
| f) | Other operating expenses (revenues), net
|  | 2017 |  |  | 2016 |  |  | 2015 |
Leasing and rentals |  |  | 103 |  |  |  | 112 |  |  |  | 102 |
Advertising |  |  | 30 |  |  |  | 13 |  |  |  | 11 |
Own consumption of energy |  |  | 24 |  |  |  | 22 |  |  |  | 21 |
Subsidies and donations |  |  | 19 |  |  |  | 17 |  |  |  | 31 |
Paid concession |  |  | 3 |  |  |  | 3 |  |  |  | 7 |
Insurance |  |  | 8 |  |  |  | 9 |  |  |  | 9 |
CCEE annual charge |  |  | 8 |  |  |  | 8 |  |  |  | 8 |
Net loss (gain) on deactivation and disposal of assets |  |  | 193 |  |  |  | 112 |  |  |  | 30 |
Forluz – Administrative running cost |  |  | 26 |  |  |  | 25 |  |  |  | 22 |
Collection agents |  |  | 71 |  |  |  | 70 |  |  |  | 71 |
Gain on disposal, Taesa |  |  | (207 | ) |  |  | (181 | ) |  |  | — |
Gain on disposal, Transchile |  |  | — |  |  |  | (134 | ) |  |  | — |
Loss on investment |  |  | 9 |  |  |  | — |  |  |  | — |
Other expenses |  |  | 96 |  |  |  | 79 |  |  |  | 114 |
|  |  | 383 |  |  |  | 155 |  |  |  | 426 |
Operating leasing The Company has operating lease contracts relating to, mainly, vehicles and buildings used in its operations. Related amounts are not material in relation to the total costs of the Company.

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