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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, 2019	Dec. 31, 2018
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
Bank charges	$ 3.5	5.6
Total other finance expense	3.5	6.4
Derecognition of notes payable	(0.4)	(0.7)
Other net finance expense	$ 3.1	$ 5.7

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
-Number 1
-IssueDate 2019-01-01
-Paragraph 112
-Subparagraph c
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-URIDate 2019-03-27

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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 2019-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2019-03-27

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X

- Definition

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

+ References

No definition available.

+ Details

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X

- Definition

Derecognition of notes payable.

+ References

No definition available.

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X

- Definition

Disclosure of other net finance expense.

+ References

No definition available.

+ Details

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X

- 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.

+ References

No definition available.

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