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(Loss)/earnings per ordinary share (Tables) | 12 Months Ended
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Dec. 31, 2020
Text block [abstract] |
Summary of (Loss)/earnings per ordinary share |
Continuing and total operations |  | 2020 |  |  | 2019 |  |  | 2018 |
Basic (loss)/earnings per ordinary share |  |  |  |  |  |  |  |  |  |  |  |
(Loss)/profit available for equity holders ($m) |  |  | (260 | ) |  |  | 385 |  |  |  | 349 |
Basic weighted average number of ordinary shares (millions) |  |  | 182 |  |  |  | 183 |  |  |  | 190 |
Basic (loss)/earnings per ordinary share (cents) |  |  | (142.9 | ) |  |  | 210.4 |  |  |  | 183.7 |
Diluted (loss)/earnings per ordinary share |  |  |  |  |  |  |  |  |  |  |  |
(Loss)/profit available for equity holders ($m) |  |  | (260 | ) |  |  | 385 |  |  |  | 349 |
Diluted weighted average number of ordinary shares (millions) |  |  | 182 |  |  |  | 184 |  |  |  | 192 |
Diluted (loss)/earnings per ordinary share (cents) |  |  | (142.9 | ) |  |  | 209.2 |  |  |  | 181.8 |
Adjusted earnings per ordinary share |  |  |  |  |  |  |  |  |  |  |  |
(Loss)/profit available for equity holders ($m) |  |  | (260 | ) |  |  | 385 |  |  |  | 349 |
Adjusting items: |  |  |  |  |  |  |  |  |  |  |  |
System Fund revenues and expenses ($m) |  |  | 102 |  |  |  | 49 |  |  |  | 146 |
Interest attributable to the System Fund ($m) |  |  | (4 | ) |  |  | (18 | ) |  |  | (19 | )
Operating exceptional items ($m) (note 6) |  |  | 270 |  |  |  | 186 |  |  |  | 104 |
Exceptional financial expenses ($m) (note 6) |  |  | 14 |  |  |  | — |  |  |  | — |
Change in fair value of contingent purchase consideration ($m) (note 25) |  |  | (13 | ) |  |  | (27 | ) |  |  | 4 |
Tax on exceptional items ($m) (note 6) |  |  | (52 | ) |  |  | (20 | ) |  |  | (22 | )
Exceptional tax ($m) (note 6) |  |  | — |  |  |  | — |  |  |  | (5 | )
Adjusted earnings ($m) |  |  | 57 |  |  |  | 555 |  |  |  | 557 |
Basic weighted average number of ordinary shares (millions) |  |  | 182 |  |  |  | 183 |  |  |  | 190 |
Adjusted earnings per ordinary share (cents) |  |  | 31.3 |  |  |  | 303.3 |  |  |  | 293.2 |
Adjusted diluted earnings per ordinary share |  |  |  |  |  |  |  |  |  |  |  |
Adjusted earnings ($m) |  |  | 57 |  |  |  | 555 |  |  |  | 557 |
Diluted weighted average number of ordinary shares (millions) |  |  | 182 |  |  |  | 184 |  |  |  | 192 |
Adjusted diluted earnings per ordinary share (cents) |  |  | 31.3 |  |  |  | 301.6 |  |  |  | 290.1 |
|  | 2020 millions |  |  | 2019 millions |  |  | 2018 millions |
Diluted weighted average number of ordinary shares is calculated as: |  |  |  |  |  |  |  |  |  |  |  |
Basic weighted average number of ordinary shares |  |  | 182 |  |  |  | 183 |  |  |  | 190 |
Dilutive potential ordinary shares |  |  | — |  |  |  | 1 |  |  |  | 2 |
|  | 182 |  |  | 184 |  |  | 192 |

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