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Reconciliation of profit for the year to cash flow from operations - Summary of Reconciliation of Profit for the Year to Cash Flow From Operations (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Reconciliation of profit (loss) to net cash flows from operating activities [Line Items] |  |  |  |  |
Profit for the year | $ 750 | $ 376 | [1],[2] | $ 265 | [2]
Adjustments for: |  |  |  |  |
Net financial expenses | 52 | 96 |  | 139 |
Fair value losses/(gains) on contingent purchase consideration | 4 | (8) | [2] | (6) | [2]
Income tax charge | 260 | 164 |  | 96 |
Operating profit adjustments: |  |  |  |  |
Impairment (reversal)/loss on financial assets | (1) | 5 | [2] | 0 | [2]
Other net impairment (reversals)/charges | 0 | (5) |  | 4 |
Other operating exceptional items | (28) | 100 |  | 25 |
Depreciation and amortisation | 67 | 68 |  | 98 |
Operating profit adjustments | 38 | 168 |  | 127 |
Contract assets deduction in revenue | 37 | 32 |  | 35 |
Share-based payments cost | 36 | 30 |  | 28 |
Share of (profits)/losses of associates and joint ventures (before exceptional items) | (31) | 59 | [2] | 8 | [2]
Other adjustments for non-cash items | 60 | 61 |  | 71 |
System Fund adjustments: |  |  |  |  |
Depreciation and amortisation | 83 | 86 |  | 94 |
Impairment loss/(reversal) on financial assets | 0 | 7 |  | (6) |
Other impairment reversals | 0 | 0 |  | (3) |
Share-based payments cost | 20 | 16 |  | 13 |
Share of losses of associates | 3 | 1 |  | 2 |
System fund adjustments | 106 | 110 |  | 100 |
Working capital and other adjustments: |  |  |  |  |
Increase in deferred revenue | 123 | 108 |  | 39 |
Decrease in inventories | 0 | 0 |  | 1 |
Increase in trade and other receivables | (70) | (132) |  | (75) |
Increase in trade and other payables | 31 | 121 |  | 153 |
Other adjustments | (5) | 4 |  | (8) |
Working capital and other adjustments | 79 | 101 |  | 110 |
Cash flows relating to exceptional items | (29) | (43) |  | (12) |
Contract acquisition costs, net of repayments | (101) | (64) |  | (42) |
Total adjustments | 469 | 585 |  | 583 |
Cash flow from operations | 1,219 | 961 |  | 848 |
Excluding exceptional items [member] |  |  |  |  |
Operating profit adjustments: |  |  |  |  |
Share of (profits)/losses of associates and joint ventures (before exceptional items) | $ (13) | $ (1) |  | $ 8 |
[1] | In 2023, gains/(losses) on net investment hedges have been presented on a separate line. The 2022 amount was previously presented within ‘Exchange (losses)/gains on retranslation of foreign operations’.
[2] | Re-presented for the adoption of IFRS 17 ‘Insurance Contracts’ and to combine System Fund revenues and reimbursables (see New accounting standards and other presentational changes).

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