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Income Tax - Summary of Calculation of Income Tax Expense Accrued (Detail) - ARS ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Reconciliation of accounting profit multiplied by applicable tax rates [abstract] |  |  |
Current income tax | $ (943) | $ (605) | $ (734)
Deferred income tax | (50,595) | 4,574 | 2,159
Income tax expense | $ (51,538) | $ 3,969 | $ 1,425

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- Definition The amount of income taxes payable (recoverable) in respect of the taxable profit (tax loss) for a period. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 12 -IssueDate 2018-01-01 -Paragraph 80 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_80_a&doctype=Standard -URIDate 2018-03-16 + Details
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