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Disposition of a Subsidiary - Summary of Disposition of Subsidiary (Detail) CAD in Millions, $ in Millions |  | 12 Months Ended
--- | --- | ---
May 05, 2017 CAD | May 05, 2017 USD ($) | Dec. 31, 2017 CAD
Disclosure of disposal of subsidiaries [line items] |  |  |
Cumulative exchange loss on translating foreign operations reclassified from equity |  |  | CAD (13.8)
Gain on disposition of a subsidiary |  |  | 54.6
Disposal of major subsidiary [member] |  |  |
Disclosure of disposal of subsidiaries [line items] |  |  |
Gross proceeds | CAD 369.1 | $ 270.0 | 369.1
Working capital adjustments |  |  | (15.3)
Transaction costs |  |  | (16.9)
Net proceeds from sale | CAD 336.9 |  | 336.9
Net assets disposed |  |  | (268.5)
Cumulative exchange loss on translating foreign operations reclassified from equity |  |  | (13.8)
Gain on disposition of a subsidiary |  |  | CAD 54.6

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- Definition The amount of assets, other than cash or cash equivalents, in subsidiaries or other businesses over which control is obtained or lost. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2017-01-01 -Paragraph 40 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_40_d&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The gains (losses) on disposals of investments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 98 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_98_d&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The increase (decrease) in working capital. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2017-01-01 -Paragraph 20 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_20&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of reclassification adjustments related to exchange differences when the financial statements of foreign operations are translated, net of tax. Reclassification adjustments are amounts reclassified to profit (loss) in the current period that were recognised in other comprehensive income in the current or previous periods. [Refer: Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 21 -IssueDate 2017-01-01 -Paragraph 48 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=21&date=2017-03-01&anchor=para_48&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 92 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_92&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Disclosure of disposal of subsidiaries. + References No definition available. + Details
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