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Income and Social Contribution Taxes - Additional Information (Detail) | 12 Months Ended
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Dec. 31, 2017
Disclosure Of Income And Social Contribution Taxes Recoverable [Abstract] |
Tax credits for income tax | 25.00%
Social contribution tax rate | 9.00%
Tax loss and negative tax-balance carryforwards, limitation percentage | 30.00%

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- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_c_ii&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Social contribution tax rate. + References No definition available. + Details
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