Basic earnings per share
Calculation of the basic earnings per share for the year ended December 31, 2017, is based on the earnings allocated to the holders of the ordinary shares divided by the weighted-average number of ordinary shares outstanding, calculated as follows:
| For the year ended December 31 | ||
| 2017 | 2016 | 2015 |
| $ millions | $ millions | $ millions |
Earnings (losses) attributed to the shareholders of the Company |