Earnings per share - Schedule of Numbers of Shares Earnings Per Share (Detail) - shares shares in Millions |
12 Months Ended | ||
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Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
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Weighted average number of shares in issue | |||
Basic | 4,914 | 4,886 | 4,860 |
Dilution for share options and awards | 57 | 55 | 49 |
Diluted | 4,971 | 4,941 | 4,909 |
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- Definition The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The number of dilutive potential ordinary shares that relate to the assumed exercise of the entity's share options. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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