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Share capital (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure Of Classes Of Share Capital [Abstract] |
Common shares issued |
Number issued (number of shares) | 2018 | 2017
Beginning of year | 395,792,732 | 395,792,522
Issued: |  |
| Stock option plan [note 24] | - | 210
End of year | 395,792,732 | 395,792,732

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- Definition The disclosure of issued capital. [Refer: Issued capital] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_10_e&doctype=Standard -URIDate 2018-03-16 + Details
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