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Other Liabilities and Provisions - Summary of Other Liabilities and Provisions (Parenthetical) (Detail) - CAD CAD in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Other Liabilities and Provisions [member] |  |
Disclosure of other provisions [line items] |  |
Derivative liabilities, current | CAD 0 | CAD 5

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- Definition The amount of current derivative financial liabilities. [Refer: Derivative financial liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_55&doctype=Standard -URIDate 2017-03-09 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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Period Type: | duration

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- Details
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Balance Type: |
Period Type: |