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Equity (Tables) | 12 Months Ended
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Dec. 31, 2023
Text Block [Abstract] |
Summary of Equity Share Capital |
Allotted, called up and fully paid |  |  |  |  | Number of shares millions |  |  |  |  |  | Nominal value $m |  |  | Share premium $m |  |  | Equity share capital $m |
At 1 January 2021 (ordinary shares of 20 340 / 399 p each) |  |  |  |  |  |  | 187 |  |  |  |  |  |  |  | 53 |  |  |  | 103 |  |  |  | 156 |
Exchange adjustments |  |  |  |  |  |  | – |  |  |  |  |  |  |  | – |  |  |  | (2 | ) |  |  | (2 | )
At 31 December 2021 (ordinary shares of 20 340 / 399 p each) |  |  |  |  |  |  | 187 |  |  |  |  |  |  |  | 53 |  |  |  | 101 |  |  |  | 154 |
Repurchased and cancelled under share repurchase programme |  |  |  |  |  |  | (4 | ) |  |  |  |  |  |  | (1 | ) |  |  | – |  |  |  | (1 | )
Exchange adjustments |  |  |  |  |  |  | – |  |  |  |  |  |  |  | (6 | ) |  |  | (10 | ) |  |  | (16 | )
At 31 December 2022 (ordinary shares of 20 340 / 399 p each) |  |  |  |  |  |  | 183 |  |  |  |  |  |  |  | 46 |  |  |  | 91 |  |  |  | 137 |
Repurchased and cancelled under share repurchase programme |  |  |  |  |  |  | (11 | ) |  |  |  |  |  |  | (3 | ) |  |  | – |  |  |  | (3 | )
Exchange adjustments |  |  |  |  |  |  | – |  |  |  |  |  |  |  | 3 |  |  |  | 4 |  |  |  | 7 |
At 31 December 2023 (ordinary shares of 20 340 / 399 p each) |  |  |  |  |  |  | 172 |  |  |  |  |  |  |  | 46 |  |  |  | 95 |  |  |  | 141 |
Summary of Shares Held By Employee Share Trusts |
|  |  |  |  | Number of shares millions |  |  |  |  |  | Carrying value $m |  |  | Market value $m |
31 December 2023 |  |  |  |  |  |  | 0.8 |  |  |  |  |  |  |  | 35.0 |  |  |  | 73.6 |
31 December 2022 |  |  |  |  |  |  | 1.1 |  |  |  |  |  |  |  | 37.0 |  |  |  | 62.8 |
31 December 2021 |  |  |  |  |  |  | 0.9 |  |  |  |  |  |  |  | 21.7 |  |  |  | 57.3 |
Summary of Cash Flow Hedge Reserves |
|  |  |  |  | Cash flow hedge reserve $m |  |  | Cost of hedging reserve $m |  |  | Total $m |
At 1 January 2021 |  |  |  |  |  |  | (11 | ) |  |  | (13 | ) |  |  | (24 | )
Costs of hedging deferred and recognised in other comprehensive income |  |  |  |  |  |  | – |  |  |  | 2 |  |  |  | 2 |
Change in fair value of currency swaps recognised in other comprehensive income |  |  |  |  |  |  | (62 | ) |  |  | – |  |  |  | (62 | )
Reclassified from other comprehensive income to profit or loss – included in financial expenses |  |  |  |  |  |  | 96 |  |  |  | – |  |  |  | 96 |
Deferred tax |  |  |  |  |  |  | (7 | ) |  |  | – |  |  |  | (7 | )
At 31 December 2021 |  |  |  |  |  |  | 16 |  |  |  | (11 | ) |  |  | 5 |
Costs of hedging deferred and recognised in other comprehensive income |  |  |  |  |  |  | – |  |  |  | 3 |  |  |  | 3 |
Change in fair value of currency swaps recognised in other comprehensive income |  |  |  |  |  |  | 33 |  |  |  | – |  |  |  | 33 |
Reclassified from other comprehensive income to profit or loss – included in financial expenses |  |  |  |  |  |  | (43 | ) |  |  | – |  |  |  | (43 | )
Deferred tax |  |  |  |  |  |  | 2 |  |  |  | – |  |  |  | 2 |
At 31 December 2022 |  |  |  |  |  |  | 8 |  |  |  | (8 | ) |  |  | – |
Change in fair value of currency swaps recognised in other comprehensive income |  |  |  |  |  |  | (30 | ) |  |  | – |  |  |  | (30 | )
Reclassified from other comprehensive income to profit or loss – included in financial expenses |  |  |  |  |  |  | 28 |  |  |  | – |  |  |  | 28 |
At 31 December 2023 |  |  |  |  |  |  | 6 |  |  |  | (8 | ) |  |  | (2 | )
Treasury shares | Treasury shares
|  |  |  |  | Number of shares millions |  |  |  |  |  | Nominal value $m |
At 1 January 2021 |  |  |  |  |  |  | 5.1 |  |  |  |  |  |  |  | 1.4 |
Transferred to employee share trusts |  |  |  |  |  |  | (1.4 | ) |  |  |  |  |  |  | (0.4 | )
At 31 December 2021 |  |  |  |  |  |  | 3.7 |  |  |  |  |  |  |  | 1.0 |
Transferred to employee share trusts |  |  |  |  |  |  | (0.7 | ) |  |  |  |  |  |  | (0.2 | )
Repurchased under share repurchase programme |  |  |  |  |  |  | 4.5 |  |  |  |  |  |  |  | 1.1 |
At 31 December 2022 |  |  |  |  |  |  | 7.5 |  |  |  |  |  |  |  | 1.9 |
Transferred to employee share trusts |  |  |  |  |  |  | (0.5 | ) |  |  |  |  |  |  | (0.1 | )
Exchange adjustments |  |  |  |  |  |  | – |  |  |  |  |  |  |  | 0.1 |
At 31 December 2023 |  |  |  |  |  |  | 7.0 |  |  |  |  |  |  |  | 1.9 |

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