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Investments in Joint Ventures and Associates - Additional Information (Detail) - CAD | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Disclosure of joint ventures and associates [line items] |  |
Dividend paid | CAD 0 | CAD 0
PAE Limited [member] |  |
Disclosure of joint ventures and associates [line items] |  |
Percentage of investment in joint venture | 40.00% |
ESH MWH Limited. [member] |  |
Disclosure of joint ventures and associates [line items] |  |
Percentage of investment in joint venture | 50.00% |

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- Definition The amount of dividends paid by the entity on ordinary shares. [Refer: Ordinary shares [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 34 -IssueDate 2017-01-01 -Paragraph 16A -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=34&date=2017-03-01&anchor=para_16A_f&doctype=Standard -URIDate 2017-03-09 + Details
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Period Type: | duration

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- Definition The proportion of ownership interest in a joint venture attributable to the entity. [Refer: Joint ventures [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2017-01-01 -Paragraph 17 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2017-03-01&anchor=para_17_b_iii&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2017-01-01 -Paragraph 16 -Subparagraph b -Clause iii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2017-03-01&anchor=para_16_b_iii&doctype=Standard -URIDate 2017-03-09 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2017-01-01 -Paragraph 21 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_21_a_iv&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Disclosure of joint ventures and associates. + References No definition available. + Details
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |