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v3.19.1

Share-based payments - Outstanding DSUs Activity (Details) - Deferred Stock Units (DSU) | 12 Months Ended
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Dec. 31, 2018 CAD ($) shares | Dec. 31, 2017 CAD ($) shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |
Beginning balance, outstanding (in shares) | 4,309,528 | 4,131,229
Issued (in shares) | 94,580 | 69,742
Settlement of RSUs/PSUs (in shares) | 112,675 | 101,066
Dividends credited (in shares) | 240,879 | 203,442
Settled (in shares) | (365,665) | (195,951)
Ending balance, outstanding (in shares) | 4,391,997 | 4,309,528
Weighted average fair value at measurement date, other equity instruments granted | $ | $ 55 | $ 59

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- Definition The number of other equity instruments (ie other than share options) granted 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 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_47_b&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The number of other equity instruments (ie other than share options) exercised or vested in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2018-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=2&date=2018-03-01&anchor=para_45&doctype=Standard -URIDate 2018-03-16 + Details
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