General Information - Impact of IFRS 15 on Basic and Diluted Earnings per Ordinary Share (Detail) - $ / shares	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of expected impact of initial application of new standards or interpretations [line items]
Basic earnings per ordinary share	$ 1.847	$ 2.798	$ 2.151
Diluted earnings per ordinary share	$ 1.828	2.784	$ 2.131
Previously reported [member]
Disclosure of expected impact of initial application of new standards or interpretations [line items]
Basic earnings per ordinary share		3.067
Diluted earnings per ordinary share		3.052
Increase (decrease) due to application of IFRS 15 [member]
Disclosure of expected impact of initial application of new standards or interpretations [line items]
Basic earnings per ordinary share		(0.269)
Diluted earnings per ordinary share		$ (0.268)

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).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 33
-IssueDate 2018-01-01
-Paragraph 66
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=33&date=2018-03-01&anchor=para_66&doctype=Standard
-URIDate 2018-03-16

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- Definition

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

+ References

No definition available.

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- Definition

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]]

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