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Net Interest Expense and Other Net Finance Expense - Schedule of Other Net Finance Expense (Detail) - CAD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Disclosure of other net finance expense [abstract]
Realized loss on sale of FVOCI investment debt securities	$ 0.3
Amortization on FVOCI investment debt securities	0.5	$ 0.6
Bank charges	5.6	8.6
Total other finance expense	6.4	9.2
Realized gain on sale of FVOCI investment debt securities		(1.4)
Derecognition of notes payable	(0.7)	(0.7)
Other net finance expense	$ 5.7	$ 7.1

X

- Definition

The amount of bank and similar charges recognised by the entity as an expense.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
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-IssueDate 2018-01-01
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X

- Definition

The amount of finance costs that the entity does not separately disclose in the same statement or note. [Refer: Finance costs]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 112
-Subparagraph c
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- Definition

Amortization on financial assets measured at fair value through other comprehensive income.

+ References

No definition available.

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- Definition

Derecognition of notes payable.

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- Definition

Disclosure of other net finance expense.

+ References

No definition available.

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- Definition

Loss on sale of financial assets at fair value through other comprehensive income.

+ References

No definition available.

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X

- Definition

Other finance expense.

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No definition available.

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- Definition

Other finance income on financial assets measured at fair value through other comprehensive income.

+ References

No definition available.

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