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10 Expenses by nature (Details) - ARS ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses | $ 19,866 | $ 21,980 | $ 22,842
Selling expenses | 10,843 | 10,007 | 10,534
Administrative expenses | 5,353 | 5,223 | 6,012
Expenses by nature | 36,062 | 37,210 | 39,388
Salaries and social security taxes [member] |  |  |
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses | 7,756 | 8,666 | 9,066
Selling expenses | 1,287 | 1,424 | 1,627
Administrative expenses | 2,272 | 1,819 | 1,914
Expenses by nature | 11,315 | 11,909 | 12,607
Pension plans [member] |  |  |
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses | 327 | 260 | 169
Selling expenses | 54 | 43 | 30
Administrative expenses | 96 | 54 | 36
Expenses by nature | 477 | 357 | 235
Communications expenses [member] |  |  |
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses | 218 | 113 | 170
Selling expenses | 444 | 504 | 564
Administrative expenses |  | 23 | 34
Expenses by nature | 662 | 640 | 768
Allowance for the impairment of trade and other receivables [member] |  |  |
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses |  |  |
Selling expenses | 4,183 | 1,844 | 2,046
Administrative expenses |  |  |
Expenses by nature | 4,183 | 1,844 | 2,046
Supplies consumption [member] |  |  |
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses | 1,878 | 2,200 | 1,654
Selling expenses |  |  |
Administrative expenses | 148 | 156 | 257
Expenses by nature | 2,026 | 2,356 | 1,911
Leases and insurance [member] |  |  |
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses | 1 |  | 1
Selling expenses | 1 |  |
Administrative expenses | 315 | 308 | 377
Expenses by nature | 317 | 308 | 378
Security service [member] |  |  |
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses | 306 | 323 | 286
Selling expenses | 32 | 58 | 4
Administrative expenses | 35 | 126 | 269
Expenses by nature | 373 | 507 | 559
Fees and remuneration for services [member] |  |  |
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses | 3,900 | 3,481 | 2,956
Selling expenses | 2,169 | 2,203 | 2,177
Administrative expenses | 1,534 | 1,856 | 2,108
Expenses by nature | 7,603 | 7,540 | 7,241
Public relations and marketing [member] |  |  |
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses |  |  |
Selling expenses | 19 | 56 |
Administrative expenses |  |  | 67
Expenses by nature | 19 | 56 | 67
Advertising and sponsorship [member] |  |  |
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses |  |  |
Selling expenses | 10 | 29 |
Administrative expenses |  |  | 35
Expenses by nature | 10 | 29 | 35
Reimbursements to personnel [member] |  |  |
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses |  |  |
Selling expenses |  |  |
Administrative expenses | 1 | 1 | 1
Expenses by nature | 1 | 1 | 1
Depreciation of property, plants and equipments [member] |  |  |
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses | 5,118 | 4,952 | 4,217
Selling expenses | 762 | 738 | 629
Administrative expenses | 626 | 605 | 516
Expenses by nature | 6,506 | 6,295 | 5,362
Depreciation of right-of-use asset [member] |  |  |
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses | 32 | 22 |
Selling expenses | 64 | 45 |
Administrative expenses | 225 | 156 |
Expenses by nature | 321 | 223 |
Directors and Supervisory Committee members' fees [member] |  |  |
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses |  |  |
Selling expenses |  |  |
Administrative expenses | 28 | 30 | 46
Expenses by nature | 28 | 30 | 46
ENRE penalties [member] |  |  |
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses | 330 | 1,963 | 4,321
Selling expenses | 365 | 1,806 | 2,202
Administrative expenses |  |  |
Expenses by nature | 695 | 3,769 | 6,523
Taxes and charges [member] |  |  |
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses |  |  |
Selling expenses | 1,453 | 1,257 | 1,254
Administrative expenses | 64 | 68 | 340
Expenses by nature | 1,517 | 1,325 | 1,594
Other [member] |  |  |
Summary of expenses by nature [line items] |  |  |
Transmission and distribution expenses |  |  | 2
Selling expenses |  |  | 1
Administrative expenses | 9 | 21 | 12
Expenses by nature | $ 9 | $ 21 | $ 15

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