Consolidated Statements of Financial Position (Parenthetical) - shares	Dec. 31, 2017	Dec. 31, 2016
Preferred shares
Statement [Line Items]
Number of shares authorised	25,000,000	25,000,000
Capital stock \| Common shares
Statement [Line Items]
Number of shares issued	83,770,254	89,824,338
Number of shares outstanding	83,770,254	89,824,338

The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 79
-Subparagraph a
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_79_a_iv&doctype=Standard
-URIDate 2017-03-09

Name:	ifrs-full_NumberOfSharesOutstanding
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant