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Earnings per share
12 Months Ended
Dec. 31, 2020
Earnings per share [abstract]  
Earning per share
9
Earnings per share
Basic earnings per ordinary share is calculated by dividing the profit attributable to ordinary shareholders of the parent company by the weighted average number of ordinary shares outstanding, excluding own shares held. Diluted earnings per ordinary share is calculated by dividing the basic earnings, which require no adjustment for the effects of dilutive potential ordinary shares, by the weighted average number of ordinary shares outstanding, excluding own shares held, plus the weighted average number of ordinary shares that would be issued on conversion of dilutive potential ordinary shares.
Profit attributable to the ordinary shareholders of the parent company
202020192018
$m$m$m
Profit attributable to shareholders of the parent company5,229 7,383 13,727 
Dividend payable on preference shares classified as equity(90)(90)(90)
Coupon payable on capital securities classified as equity(1,241)(1,324)(1,029)
Year ended 31 Dec3,898 5,969 12,608 
Basic and diluted earnings per share
202020192018
ProfitNumber
of shares
Per
share
ProfitNumber
of shares
Per
share
ProfitNumber
of shares
Per
share
Footnotes
$m(millions)$$m(millions)$$m(millions)$
Basic
13,898 20,169 0.19 5,969 20,158 0.30 12,608 19,896 0.63 
Effect of dilutive potential ordinary shares73 75 87 
Diluted13,898 20,242 0.19 5,969 20,233 0.30 12,608 19,983 0.63 
1Weighted average number of ordinary shares outstanding (basic) or assuming dilution (diluted).
The number of anti-dilutive employee share options excluded from the weighted average number of dilutive potential ordinary shares is 14.6 million (2019: 1.1 million; 2018: nil).