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Basis of Preparation of the Consolidated Financial Statements and Summary of Significant Accounting Policies and Practices - Summary of Exchange Rates Used for Translation of Foreign Currencies (Parenthetical) (Detail)	1 Months Ended	12 Months Ended
	Jul. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Argentine Peso depreciated against USD [member]
Disclosure of transactions in foreign currency [line items]
Foreign currency depreciated percentage		17.40%	21.80%
New Belarusian Ruble
Disclosure of transactions in foreign currency [line items]
Average exchange rate	10,000

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Disclosure Of Transactions In Foreign Currency [Line Items]

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Foreign currency depreciated percentage.

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- Definition

The average exchange rate used by the entity. Exchange rate is the ratio of exchange for two currencies.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2017-03-09

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