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Common Shares - Issued and Outstanding (Details) - Common shares - CAD shares in Millions, CAD in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Common shares |  |
Issued and outstanding, beginning of year | 287.9 | 284.0
Shares issued | 0.0 | 3.9
Issued and outstanding, end of year | 287.9 | 287.9
Amount |  |
Issued capital | CAD 3,094 | CAD 3,077
Common shares issued | 0 | 18
Issued and outstanding, before effect of amounts receivable under Employee Share Purchase Plan | 3,095 | 3,095
Amounts receivable under Employee Share Purchase Plan | (1) | (1)
Issued capital | CAD 3,094 | CAD 3,094

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- Definition The increase (decrease) in the number of shares outstanding. [Refer: Number of shares outstanding] + References 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 + Details
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- Definition The nominal value of capital issued. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 78 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_78_e&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares] + References 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 + Details
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- Definition The cash inflow from issuing shares. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2017-01-01 -Paragraph 17 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_17_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Issued Capital, Amount Before Receivables Under Employee Share Purchase Plan + References No definition available. + Details
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- Definition Reconciliation Of Issued Capital Outstanding [Roll Forward] + References No definition available. + Details
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- Details
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