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Other Operating Income (Expense) - Schedule of Other Operating Income (Expense) (Detail) - CAD CAD in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Other Operating Expenses [Abstract] |  |
Settlement pricing adjustments (Note 28(b)) | CAD 190 | CAD 153
Share-based compensation | (125) | (171)
Environmental and care and maintenance costs | (186) | (144)
Social responsibility and donations | (7) | (25)
Gain on sale of assets | 35 | 62
Commodity derivatives (Note 28(b) and Note 28(c)) | 12 | 32
Restructuring | (11) | (8)
Take or pay contract costs | (81) | (48)
Break fee in respect of Waneta Dam sale (Note 12) | (28) |
Other | (29) | (48)
Other operating income (expense) | CAD (230) | CAD (197)

X
- Definition The gains resulting from change in the fair value of derivatives recognised in profit or loss. [Refer: Derivatives [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_85&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The gain on disposals of non-current assets. [Refer: Non-current assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of operating income (expense) that the entity does not separately disclose in the same statement or note. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 85 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_85&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Break fee paid for sale of asset. + References No definition available. + Details
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- Definition Environmental related expenses. + References No definition available. + Details
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- Definition Other operating expense. + References No definition available. + Details
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- Definition Other operating expenses. + References No definition available. + Details
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- Definition Restructuring Charges1 + References No definition available. + Details
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- Definition Settlement pricing adjustments. + References No definition available. + Details
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- Definition Share based compensation expense. + References No definition available. + Details
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- Definition Social Responsibility and donations. + References No definition available. + Details
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- Definition Take or pay contract costs. + References No definition available. + Details
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