The amount of future capital expenditures that the entity is committed to make.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2016-01-13
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2016-03-30&anchor=para_112_c&doctype=Standard
-URIDate 2016-03-31

+ Details

Name:	ifrs-full_CapitalCommitments
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The general description of the lessee's significant leasing arrangements for operating leases including, but not limited to: (a) the basis on which contingent rent payable is determined; (b) the existence and terms of renewal or purchase options and escalation clauses; and (c) restrictions imposed by lease arrangements, such as those concerning dividends, additional debt and further leasing.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2019-01-01
-Name IAS
-Number 17
-IssueDate 2016-01-13
-Paragraph 35
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=17&date=2016-03-30&anchor=para_35_d&doctype=Standard
-URIDate 2016-03-31

+ Details

Name:	ifrs-full_DescriptionOfMaterialLeasingArrangementsByLesseeClassifiedAsOperatingLease
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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

Name:	ifrs-full_DisclosureOfFinanceLeaseAndOperatingLeaseByLesseeLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_MaturityAxis=ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfAssetsAxis=ifrs-full_OfficeEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfAssetsAxis=ifrs-full_VehiclesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments - Additional Information (Detail) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Disclosure of finance lease and operating lease by lessee [Line Items]
Commitments to purchase property, plant and equipment	$ 132.9	$ 141.6
2018 [Member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Commitments to purchase property, plant and equipment	5.2
2019 [Member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Commitments to purchase property, plant and equipment	36.5
2020 [Member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Commitments to purchase property, plant and equipment	73.0
2021
Disclosure of finance lease and operating lease by lessee [Line Items]
Commitments to purchase property, plant and equipment	$ 18.2
Office equipment [member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Terms of operating lease commitments	one to 10 years
Vehicles [member]
Disclosure of finance lease and operating lease by lessee [Line Items]
Terms of operating lease commitments	three and four years