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Stock-Based Compensation Plans - Summary of Options Outstanding and Exercisable by Range of Exercise Price (Parenthetical) (Detail) - NSRs [Member]	Dec. 31, 2020 $ / shares
Bottom of Range [Member] | 5.00 to 9.99 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Exercise price of warrants	$ 5.00
Bottom of Range [Member] | 10.00 to 14.99 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Exercise price of warrants	10.00
Bottom of Range [Member] | 15.00 to 19.99 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Exercise price of warrants	15.00
Bottom of Range [Member] | 20.00 to 24.99 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Exercise price of warrants	20.00
Bottom of Range [Member] | 25.00 to 29.99 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Exercise price of warrants	25.00
Bottom of Range [Member] | 30.00 to 34.99 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Exercise price of warrants	30.00
Top of Range [Member] | 5.00 to 9.99 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Exercise price of warrants	9.99
Top of Range [Member] | 10.00 to 14.99 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Exercise price of warrants	14.99
Top of Range [Member] | 15.00 to 19.99 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Exercise price of warrants	19.99
Top of Range [Member] | 20.00 to 24.99 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Exercise price of warrants	24.99
Top of Range [Member] | 25.00 to 29.99 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Exercise price of warrants	29.99
Top of Range [Member] | 30.00 to 34.99 [Member]
Disclosure of range of exercise prices of outstanding share options [Line Items]
Exercise price of warrants	$ 34.99

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+ References

No definition available.

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The exercise price of outstanding share options.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2020-01-01
-Paragraph 45
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2020-en-r&anchor=para_45_d&doctype=Standard
-URIDate 2020-01-01

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