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26. Income tax (Details) - ARS ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
SummaryOfIncomeTaxLineItems [Line Items] |  |  |
Tax loss carryforward |  | $ 53,792 | $ 6,160
Inventories | $ 0 | 13,454 | 7,520
Trade receivables and other receivables | 445,102 | 481,066 | 204,972
Trade payables and other payables | 1,954,762 | 424,670 | 1,659,011
Salaries and social security taxes payable | 49,439 | (95,813) | 36,176
Benefit plans | 105,984 | 219,113 | 154,759
Tax liabilities | 15,631 | 55,897 | 23,232
Provisions | 345,859 | (546,274) | 221,846
Deferred tax asset | 2,916,777 | 605,906 | 2,313,676
Property, plant and equipment | (10,748,162) | (7,466,457) | (9,779,890)
Financial assets at fair value through profit or loss | (212,477) | (386,145) | (59,581)
Borrowings | (4,446) | (43,454) | (12,424)
Deferred tax liability | (10,965,085) | (7,896,056) | (9,851,895)
Net deferred tax (liabilities) assets | (8,048,308) | (7,290,150) | $ (7,538,219)
Result from exposure to inflation |  |  |
SummaryOfIncomeTaxLineItems [Line Items] |  |  |
Tax loss carryforward |  | (1,988) |
Inventories | (9,064) | (2,427) |
Trade receivables and other receivables | (371,025) | (66,156) |
Trade payables and other payables | 757,645 | (535,455) |
Salaries and social security taxes payable | 130,428 | (11,676) |
Benefit plans | (128,800) | (49,949) |
Tax liabilities | (43,540) | (7,498) |
Provisions | 755,078 | (71,602) |
Deferred tax asset | 1,036,929 | (746,751) |
Property, plant and equipment | 903,151 | 3,027,954 |
Financial assets at fair value through profit or loss | 374,867 | 19,230 |
Borrowings | 37,986 | 4,010 |
Deferred tax liability | 1,316,004 | 3,051,194 |
Net deferred tax (liabilities) assets | 2,352,933 | 2,304,443 |
Charged to profit and loss |  |  |
SummaryOfIncomeTaxLineItems [Line Items] |  |  |
Tax loss carryforward |  | 49,620 |
Inventories | (4,390) | 8,361 |
Trade receivables and other receivables | 335,061 | 342,250 |
Trade payables and other payables | 772,447 | (698,886) |
Salaries and social security taxes payable | 14,824 | (120,313) |
Benefit plans | 13,980 | 121,519 |
Tax liabilities | 3,274 | 40,163 |
Provisions | 137,055 | (696,518) |
Deferred tax asset | 1,272,251 | (953,803) |
Property, plant and equipment | (4,184,856) | (714,521) |
Financial assets at fair value through profit or loss | (201,199) | (345,794) |
Borrowings | 1,022 | (35,040) |
Deferred tax liability | (4,385,033) | (1,095,355) |
Net deferred tax (liabilities) assets | (3,112,782) | (2,049,158) |
Charged to other comprehensive income |  |  |
SummaryOfIncomeTaxLineItems [Line Items] |  |  |
Tax loss carryforward |  | 0 |
Inventories | 0 | 0 |
Trade receivables and other receivables | 0 | 0 |
Trade payables and other payables | 0 | 0 |
Salaries and social security taxes payable | 0 | 0 |
Benefit plans | 1,691 | (7,216) |
Tax liabilities | 0 | 0 |
Provisions | 0 | 0 |
Deferred tax asset | 1,691 | (7,216) |
Property, plant and equipment | 0 | 0 |
Financial assets at fair value through profit or loss | 0 | 0 |
Borrowings | 0 | 0 |
Deferred tax liability | 0 | 0 |
Net deferred tax (liabilities) assets | $ 1,691 | $ (7,216) |

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