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General Information - Impact of IFRS 15 on Basic and Diluted Earnings per Ordinary Share (Detail) - $ / shares | 12 Months Ended
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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) |

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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). + References 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 + Details
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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]] + References 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 + Details
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