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Net income (loss) per common share (Tables) | 12 Months Ended
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Dec. 31, 2017
Earnings per share [abstract] |
Earnings per share reconciliation | A reconciliation of the denominator used for the purposes of calculating basic and diluted net income (loss) per common share is as follows:
For the years ended December 31 | 2017 |  | 2016 |
Denominator for basic net income (loss) per common share | 86,768,589 |  | 89,783,883 |
Effect of dilutive stock options | 56,359 |  | — |
Denominator for diluted net income (loss) per common share | 86,824,948 |  | 89,783,883 |
For the years ended December 31, 2017 and 2016, basic and diluted net income (loss) per common share attributable to Methanex shareholders were as follows:
For the years ended December 31 | 2017 |  | 2016 |
Basic net income (loss) per common share | $ | 3.64 |  | $ | (0.14 | )
Diluted net income (loss) per common share | $ | 3.64 |  | $ | (0.14 | )

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- Definition The disclosure of earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2017-01-01 -Paragraph 66 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=33&date=2017-03-01&anchor=para_66&doctype=Standard -URIDate 2017-03-09 + Details
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