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Earnings per ordinary share | 12 Months Ended
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Dec. 31, 2023
Text Block [Abstract] |
Earnings per ordinary share | 10. Earnings per ordinary share
Basic earnings per ordinary share |  |  |  |  | 2023 |  |  |  |  |  | 2022 |  |  |  |  |  | 2021 |
Profit available for equity holders ($m) |  |  |  |  |  |  | 750 |  |  |  |  |  |  |  | 375 |  |  |  |  |  |  |  | 266 |
Basic weighted average number of ordinary shares (millions) |  |  |  |  |  |  | 169 |  |  |  |  |  |  |  | 181 |  |  |  |  |  |  |  | 183 |
Basic earnings per ordinary share (cents) |  |  |  |  |  |  | 443.8 |  |  |  |  |  |  |  | 207.2 |  |  |  |  |  |  |  | 145.4 |
Diluted earnings per ordinary share |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Profit available for equity holders ($m) |  |  |  |  |  |  | 750 |  |  |  |  |  |  |  | 375 |  |  |  |  |  |  |  | 266 |
Diluted weighted average number of ordinary shares (millions) |  |  |  |  |  |  | 170 |  |  |  |  |  |  |  | 182 |  |  |  |  |  |  |  | 184 |
Diluted earnings per ordinary share (cents) |  |  |  |  |  |  | 441.2 |  |  |  |  |  |  |  | 206.0 |  |  |  |  |  |  |  | 144.6 |
Basic and diluted share denominators are calculated as follows:
|  |  |  |  | 2023 millions |  |  |  |  |  | 2022 millions |  |  |  |  |  | 2021 millions |
Weighted average number of ordinary shares in issue |  |  |  |  |  |  | 177 |  |  |  |  |  |  |  | 187 |  |  |  |  |  |  |  | 187 |
Weighted average number of treasury shares |  |  |  |  |  |  | (8 | ) |  |  |  |  |  |  | (6 | ) |  |  |  |  |  |  | (4 | )
Basic weighted average number of ordinary shares |  |  |  |  |  |  | 169 |  |  |  |  |  |  |  | 181 |  |  |  |  |  |  |  | 183 |
Dilutive potential ordinary shares |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  | 1 |  |  |  |  |  |  |  | 1 |
Diluted weighted average number of ordinary shares |  |  |  |  |  |  | 170 |  |  |  |  |  |  |  | 182 |  |  |  |  |  |  |  | 184 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2023-01-01 -Section Disclosure -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2023-en-r&doctype=Standard&dita_xref=IAS33_g70-73A_TI -URIDate 2023-03-23 + Details
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- Definition Text block [abstract] + References No definition available. + Details
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