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15. INCOME TAX AND SOCIAL CONTRIBUTION (Details 4) - BRL (R$) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Tax Installments Programs Details 1Abstract |  |
Actuarial gains on defined benefit pension plan | R$ 176,700 | R$ 176,658
Estimated losses for deferred income and social contribution tax credits - actuarial gains | (180,048) | (180,834)
Changes in the fair value of assets measured at fair value through other comprehensive income |  | (530,292)
Estimated losses for deferred income tax and social contribution assets - assets measured at fair value through other comprehensive income |  | 530,292
Exchange differences on translating foreign operations | (325,350) | (369,017)
Cash flow hedge accounting | 490,041 | 134,478
Estimated losses for deferred income and social contribution tax credits - cash flow hedge | (490,041) | (134,478)
Income tax and social contribution | R$ (328,698) | R$ (373,193)

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- Definition The amount of income tax relating to gains losses on cash flow hedges net of tax charged directly to equity. + References No definition available. + Details
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- Definition The amount of income tax relating to gains losses on remeasurements of defined benefit plans charged or credited directly to equity. + References No definition available. + Details
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- Definition The amount of income tax relating to hedges of investment in equity instrument charged or credited directly to equity. + References No definition available. + Details
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- Definition The amount of income tax relating to remeasurements of define benefit plans charged or credited directly to equity. + References No definition available. + Details
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- Definition The aggregate current and deferred tax relating to particular items that are charged or credited directly to equity, for example: (a) an adjustment to the opening balance of retained earnings resulting from either a change in accounting policy that is applied retrospectively or the correction of an error; and (b) amounts arising on initial recognition of the equity component of a compound financial instrument. [Refer: Deferred tax relating to items credited (charged) directly to equity; Retained earnings; Financial instruments, class [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2018-01-01 -Paragraph 81 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_a&doctype=Standard -URIDate 2018-03-16 + Details
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