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Segmental Information - Summary of Information by Reportable Segment - Result (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of reportable segments [line items] |  |  |  |
System Fund and reimbursable revenues |  | $ 2,611 | $ 2,460 | $ 2,049
Revenue |  | 4,923 | 4,624 | 3,892
Operating profit |  | 1,041 | 1,066 | 628
Net financial expenses |  | (140) | (52) | (96)
Fair value (losses)/gains on contingent purchase consideration |  | (4) | (4) | 8
Profit/(loss) before tax |  | 897 | 1,010 | 540
Tax | [1] | (269) | (260) | (164)
Profit for the year |  | 628 | 750 | 376
Exceptional items [member] |  |  |  |
Disclosure of reportable segments [line items] |  |  |  |
Operating profit |  | 0 | 28 | (95)
Tax |  | 0 | 7 | (26)
Reportable segments [member] |  |  |  |
Disclosure of reportable segments [line items] |  |  |  |
Revenue |  | 2,312 | 2,164 | 1,843
Reportable segments [member] | Before exceptional items [member] |  |  |  |
Disclosure of reportable segments [line items] |  |  |  |
Operating profit |  | 1,124 | 1,019 | 828
System Fund and Reimbursable Result [member] | Exceptional items [member] |  |  |  |
Disclosure of reportable segments [line items] |  |  |  |
Operating profit |  | (83) | 19 | (105)
Americas [member] | Exceptional items [member] |  |  |  |
Disclosure of reportable segments [line items] |  |  |  |
Operating profit |  | 4 | 27 | (46)
Americas [member] | Reportable segments [member] |  |  |  |
Disclosure of reportable segments [line items] |  |  |  |
Revenue |  | 1,141 | 1,105 | 1,005
Americas [member] | Reportable segments [member] | Before exceptional items [member] |  |  |  |
Disclosure of reportable segments [line items] |  |  |  |
Operating profit |  | 828 | 815 | 761
EMEAA [member] | Exceptional items [member] |  |  |  |
Disclosure of reportable segments [line items] |  |  |  |
Operating profit |  | (4) | 1 | (49)
EMEAA [member] | Reportable segments [member] |  |  |  |
Disclosure of reportable segments [line items] |  |  |  |
Revenue |  | 748 | 677 | 552
EMEAA [member] | Reportable segments [member] | Before exceptional items [member] |  |  |  |
Disclosure of reportable segments [line items] |  |  |  |
Operating profit |  | 270 | 215 | 152
Greater China [member] | Reportable segments [member] |  |  |  |
Disclosure of reportable segments [line items] |  |  |  |
Revenue |  | 161 | 161 | 87
Greater China [member] | Reportable segments [member] | Before exceptional items [member] |  |  |  |
Disclosure of reportable segments [line items] |  |  |  |
Operating profit |  | 98 | 96 | 23
Central [member] | Reportable segments [member] |  |  |  |
Disclosure of reportable segments [line items] |  |  |  |
Revenue |  | 262 | 221 | 199
Central [member] | Reportable segments [member] | Before exceptional items [member] |  |  |  |
Disclosure of reportable segments [line items] |  |  |  |
Operating profit |  | $ (72) | $ (107) | $ (108)
[1] | ‘Other jurisdictions’ includes $169m (2023: $172m, 2022: $134m) in respect of US taxes.

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