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Income Tax Expense - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of income tax [line items]
Weighted average applicable tax rate	32.30%	3.50%
Canada [member]
Disclosure of income tax [line items]
Statutory tax rate in effect	27.00%	26.00%
United States [member]
Disclosure of income tax [line items]
Statutory tax rate in effect	21.00%	23.00%

X

- Definition

The applicable income tax rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2018-01-01
-Paragraph 81
-Subparagraph c
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_c_ii&doctype=Standard
-URIDate 2018-03-16

+ Details

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Namespace Prefix:	ifrs-full_
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Balance Type:	na
Period Type:	duration

X

- Definition

The tax expense (income) divided by the accounting profit. [Refer: Accounting profit]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2018-01-01
-Paragraph 81
-Subparagraph c
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_c_ii&doctype=Standard
-URIDate 2018-03-16

+ Details

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X

- Definition

Disclosure of income tax.

+ References

No definition available.

+ Details

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X

- Details

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X

- Details

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Namespace Prefix:
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