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Lease Assets and Lease Liabilities - Summary of Detailed Information Related to Administrative and Marketing Expenses (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2019 CAD ($)
Statement [line items]
Rent expense - variable lease payments	$ 48.7
Rent expense - short-term leases and leases of low value assets	10.0
Income from subleases	(5.1)
Total	$ 53.6

X

- Definition

The amount of the expense relating to variable lease payments not included in the measurement of lease liabilities. Variable lease payments are the portion of payments made by a lessee to a lessor for the right to use an underlying asset during the lease term that varies because of changes in facts or circumstances occurring after the commencement date, other than the passage of time. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 53
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_e&doctype=Standard
-URIDate 2019-03-27

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The amount of income from subleasing right-of-use assets. Sublease is a transaction for which an underlying asset is re-leased by a lessee (‘intermediate lessor’) to a third party, and the lease (‘head lease’) between the head lessor and lessee remains in effect. [Refer: Right-of-use assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2019-01-01
-Paragraph 53
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_53_f&doctype=Standard
-URIDate 2019-03-27

+ Details

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Period Type:	duration

X

- Definition

Expense​ Relating ​To Short Term Lease And Leases ​Of Low-value ​Assets ​For ​Which ​Recognition ​Exemption​ Has​ Been​ Used.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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X

- Definition

Total Expense Relating To Lease Payments Not Included In Measurement Of Lease Liabilities.

+ References

No definition available.

+ Details

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