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INCOME TAXES - Unrecognized deferred tax assets (Details) - CAD CAD in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Total unrecognized temporary differences | CAD 64 | CAD 51
Capital losses in Canada that can be applied against future capital gains |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Total unrecognized temporary differences | 0 | 1
Tax losses in foreign jurisdictions that expire between 2023 and 2036 |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Total unrecognized temporary differences | 41 | 36
Deductible temporary differences in foreign jurisdictions |  |
Disclosure of temporary difference, unused tax losses and unused tax credits [line items] |  |
Total unrecognized temporary differences | CAD 23 | CAD 14

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- Definition The amount of deductible temporary differences for which no deferred tax asset is recognised in the statement of financial position. [Refer: Temporary differences [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_e&doctype=Standard -URIDate 2017-03-09 + Details
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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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