Share Capital and Earnings Per Share - Summary of Basic and Diluted Earnings Per Common Share (Detail) - $ / shares	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Earnings per share [abstract]
Basic earnings per common share	$ 2.94	$ 2.77
Diluted earnings per common share	$ 2.93	$ 2.77

The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 33
-IssueDate 2020-01-01
-Paragraph 66
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=33&code=ifrs-tx-2020-en-r&anchor=para_66&doctype=Standard
-URIDate 2020-01-01

Name:	ifrs-full_DilutedEarningsLossPerShare
Namespace Prefix:	ifrs-full_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration