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32 Income tax and deferred tax (Details) - ARS ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Summary of income tax deferred tax [line items] |  |  |  |
Tax loss carryforward | $ 248 |  |  | $ 113
Inventories |  |  |  | 28
Trade receivables and other receivables | 1,351 | 754 | 932 | 1,006
Trade payables and other payables | 677 | 819 | 4,092 | 889
Salaries and social security taxes payable | 255 | 154 | 103 | (201)
Benefit plans | 76 | 147 | 222 | 459
Tax liabilities | 19 | 25 | 33 | 117
Provisions | 818 | 916 | 724 | (1,143)
Deferred tax asset | 3,444 | 2,815 | 6,106 | 1,268
Property, plant and equipment | (23,383) | (26,740) | (22,498) | (15,628)
Financial assets at fair value through profit or loss | (298) | (283) | (445) | (809)
Borrowings | (2) | (5) | (9) | (91)
Tax inflation adjustment | (3,470) | (3,087) |  |
Deferred tax liability | (27,153) | (30,115) | (22,952) | (16,528)
Net deferred tax liability | (23,709) | (27,300) | (16,847) | $ (15,260)
Result from exposure to inflation [member] |  |  |  |
Summary of income tax deferred tax [line items] |  |  |  |
Tax loss carryforward |  |  | (113) |
Inventories |  |  | (19) |
Trade receivables and other receivables | (200) | (326) | (775) |
Trade payables and other payables | (217) | (1,431) | 1,586 |
Salaries and social security taxes payable | (40) | (36) | 273 |
Benefit plans | (39) | (78) | (270) |
Tax liabilities | (7) | (11) | (91) |
Provisions | (243) | (253) | 1,580 |
Deferred tax asset | (746) | (2,135) | 2,171 |
Property, plant and equipment | 7,098 | 7,867 | 1,890 |
Financial assets at fair value through profit or loss | 75 | 156 | 785 |
Borrowings | 2 | 3 | 80 |
Tax inflation adjustment | 820 |  |  |
Deferred tax liability | 7,995 | 8,026 | 2,755 |
Net deferred tax liability | 7,249 | 5,891 | 4,926 |
Charged to profit and loss [member] |  |  |  |
Summary of income tax deferred tax [line items] |  |  |  |
Tax loss carryforward | 248 |  |  |
Inventories |  |  | (9) |
Trade receivables and other receivables | 797 | 148 | 701 |
Trade payables and other payables | 75 | (1,842) | 1,617 |
Salaries and social security taxes payable | 141 | 87 | 31 |
Benefit plans | 1 |  | 29 |
Tax liabilities | 1 | 3 | 7 |
Provisions | 145 | 445 | 287 |
Deferred tax asset | 1,408 | (1,159) | 2,663 |
Property, plant and equipment | (3,741) | (12,109) | (8,760) |
Financial assets at fair value through profit or loss | (90) | 6 | (421) |
Borrowings | 1 | 1 | 2 |
Tax inflation adjustment | (1,203) | (3,087) |  |
Deferred tax liability | (5,033) | (15,189) | (9,179) |
Net deferred tax liability | (3,625) | (16,348) | (6,516) |
Charged to other comprehensive income [member] |  |  |  |
Summary of income tax deferred tax [line items] |  |  |  |
Tax loss carryforward |  |  |  |
Inventories |  |  |  |
Trade receivables and other receivables |  |  |  |
Trade payables and other payables |  |  |  |
Salaries and social security taxes payable |  |  |  |
Benefit plans | (33) | 3 | 4 |
Tax liabilities |  |  |  |
Provisions |  |  |  |
Deferred tax asset | (33) | 3 | 4 |
Property, plant and equipment |  |  |  |
Financial assets at fair value through profit or loss |  |  |  |
Borrowings |  |  |  |
Tax inflation adjustment |  |  |  |
Deferred tax liability |  |  |  |
Net deferred tax liability | $ (33) | $ 3 | $ 4 |

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