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Earnings per share
12 Months Ended
Dec. 31, 2019
Weighted average ordinary shares and adjusted weighted average ordinary shares [abstract]  
Earnings per share
31. Earnings per share
The weighted average number of ordinary shares for the purposes of diluted earnings per share reconciles to the weighted average number of ordinary shares used in the calculation of basic earnings per share as follows:
 
2019

 
2018

 
 
 
 
Weighted average number of ordinary shares used in the calculation of basic earnings per share
158,856

 
158,509

Dilutive impact of share options

 

Dilutive impact of restricted share units
526

 

Dilutive impact of performance share units and restricted share units with performance criteria
2,157

 

 
 
 
 
Weighted average number of ordinary shares used in the calculation of diluted earnings per share
161,539

 
158,509