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30. OPERATING COSTS AND EXPENSES (Details) - BRL (R$) R$ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Disclosure Of Operating Costs And Expenses [abstract] |  |  |  |
Personnel |  | R$ 1,272 | R$ 1,410 | R$ 1,627
Employees' and managers' profit sharing |  | 263 | 77 | 5
Post-employment benefits (reversals) - Note 26 |  | 408 | 337 | (229)
Materials |  | 91 | 104 | 61
Raw materials and inputs for production of energy |  |  |  | 10
Outsourced services |  | 1,239 | 1,087 | 974
Energy bought for resale |  | 11,286 | 11,084 | 10,919
Depreciation and amortization | [1] | 958 | 835 | 850
Operating provisions and adjustments for operating losses |  | 2,401 | 466 | 854
Charges for use of the national grid |  | 1,426 | 1,480 | 1,174
Gas bought for resale |  | 1,436 | 1,238 | 1,071
Construction costs |  | 1,200 | 897 | 1,119
Other operating expenses, net |  | 499 | 405 | 383
Operating costs and expenses |  | R$ 22,479 | R$ 19,420 | R$ 18,818
[1] | Net of PIS/Pasep and Cofins taxes applicable to amortization of the right-of-use assets in the amount of R$5.

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