Share Capital - Schedule of Share Capital (Parenthetical) (Detail)	6 Months Ended
Jun. 30, 2018 shares
Disclosure of classes of share capital [line items]
Share issued	182,716
Ordinary shares [member]
Disclosure of classes of share capital [line items]
Treasury shares held	38,597
Employees [member] \| Common shares [member]
Disclosure of classes of share capital [line items]
Share issued	182,716

The increase (decrease) in the number of ordinary shares issued. [Refer: Ordinary shares [member]]

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

Name:	ifrs-full_IncreaseDecreaseInNumberOfOrdinarySharesIssued
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration