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Share-based payments - Outstanding Stock Options (Details) | 6 Months Ended
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Jun. 30, 2019 CAD ($) shares $ / shares
NUMBER OF OPTIONS |
Outstanding, beginning of period (in shares) | shares | 14,072,332
Granted (in shares) | shares | 3,343,317
Exercised (in shares) | shares | (1,212,974)
Forfeited (in shares) | shares | (33,613)
Outstanding, end of period (in shares) | shares | 16,169,062
Exercisable, end of period (in shares) | shares | 5,994,529
WEIGHTED AVERAGE EXERCISE PRICE ($) |
Outstanding, beginning of period (CAD per share) | $ | $ 56
Granted (CAD per share) | $ | 58
Exercised (CAD per share) | $ | 53
Forfeited (CAD per share) | $ | 58
Outstanding, end of period (CAD per share) | $ | 57
Exercisable, end of period (CAD per share) | $ | $ 55
Weighted average share price, share options exercised (CAD per share) | $ / shares | $ 60

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- Definition The number of share options outstanding in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 45 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45_d&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 45 -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45_b_i&doctype=Standard -URIDate 2018-03-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 45 -Subparagraph b -Clause vi -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45_b_vi&doctype=Standard -URIDate 2018-03-16 + Details
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