Business Combinations - Summary of Value of the Assets Acquired and Liabilities Assumed (Parenthetical) (Detail) - Alumacraft [member] $ in Millions	Jan. 31, 2019 CAD ($)
Disclosure of detailed information about business combination [line items]
Cash acquired	$ 5.3
Goodwill deductible for tax purpose	$ 2.8

The amount recognised as of the acquisition date for cash and cash equivalents acquired in a business combination. [Refer: Cash and cash equivalents; Business combinations [member]]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 3
-IssueDate 2018-01-01
-Paragraph B64
-Subparagraph i
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-URIDate 2018-03-16

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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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- Definition

The amount of goodwill in a business combination that is expected to be deductible for tax purposes. [Refer: Goodwill; Business combinations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2018-01-01
-Paragraph B64
-Subparagraph k
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=para_B64_k&doctype=Appendix&seq=2
-URIDate 2018-03-16

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