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Issued share capital (Tables) | 6 Months Ended
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Jun. 30, 2018
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Options Granted |
|  | Six months ended 30 June 2018 |  |  | Six months ended 30 June 2017 |  |  | Year ended 31 December 2017 |
Number of equity ordinary shares |  | m |  |  | m |  |  | m |
At the beginning of the period |  |  | 1,332.5 |  |  |  | 1,331.9 |  |  |  | 1,331.9 |
Exercise of share options |  |  | 0.1 |  |  |  | 0.4 |  |  |  | 0.6 |
At the end of the period |  |  | 1,332.6 |  |  |  | 1,332.3 |  |  |  | 1,332.5 |

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- Definition Disclosure of detailed information about issued share capital. + References No definition available. + Details
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