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Segmental Information - Summary of Information by Reportable Segment - Result (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of reportable segments [line items] |  |  |
System Fund revenues | $ 1,217 | $ 928 | $ 765
Reimbursement of costs | 832 | 589 | 637
Revenue | 3,892 | 2,907 | 2,394
Operating profit | 628 | 494 | (153)
Net financial expenses | (96) | (139) | (140)
Fair value gains on contingent purchase consideration | 8 | 6 | 13
Profit/(loss) before tax | 540 | 361 | (280)
Tax | (164) | (96) | 20
Profit/(loss) for the year | 376 | 265 | (260)
Exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | (95) | (29) | (270)
Fair value gains on contingent purchase consideration | 0 |  | 21
Profit/(loss) before tax | (95) | (29) | (263)
Tax | (26) | (29) | (52)
Reportable segments [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 1,843 | 1,390 | 992
Reportable segments [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 828 | 534 | 219
System Fund [member] | Exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | (105) | (11) | (102)
Americas [member] | Exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | (46) | (22) | (118)
Americas [member] | Reportable segments [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 1,005 | 774 | 512
Americas [member] | Reportable segments [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 761 | 559 | 296
EMEAA [member] | Exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | (49) | (7) | (128)
EMEAA [member] | Reportable segments [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 552 | 303 | 221
EMEAA [member] | Reportable segments [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 152 | 5 | (50)
Greater China [member] | Exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 0 |  | (5)
Greater China [member] | Reportable segments [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 87 | 116 | 77
Greater China [member] | Reportable segments [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 23 | 58 | 35
Central [member] | Exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | 0 |  | (19)
Central [member] | Reportable segments [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Revenue | 199 | 197 | 182
Central [member] | Reportable segments [member] | Before exceptional items [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Operating profit | $ (108) | $ (88) | $ (62)

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