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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, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Reconciliation of profit (loss) to net cash flows from operating activities [Line Items] |  |  |
Profit for the year | $ 628 | $ 750 | $ 376
Adjustments for: |  |  |
Net financial expenses | 140 | 52 | 96
Fair value losses/(gains) on contingent purchase consideration | 4 | 4 | (8)
Income tax charge | 269 | 260 | 164
Operating profit adjustments: |  |  |
Impairment loss/(reversal) on financial assets | 10 | (1) | 5
Other net impairment (reversals)/charges | 0 | 0 | (5)
Other operating exceptional items | 12 | (28) | 100
Depreciation and amortisation | 65 | 67 | 68
Operating profit adjustments | 87 | 38 | 168
Contract assets deduction in revenue | 43 | 37 | 32
Share-based payments cost | 44 | 36 | 30
Share of profits of associates and joint ventures (before exceptional items) | (10) | (31) | 59
Other adjustments for non-cash items | 77 | 60 | 61
System Fund adjustments: |  |  |
Depreciation and amortisation | 80 | 83 | 86
Impairment loss on financial assets | 9 | 0 | 7
Other impairment charges | 3 | 0 | 0
Share-based payments cost | 23 | 20 | 16
Share of losses of associates | 2 | 3 | 1
System fund adjustments | 117 | 106 | 110
Working capital and other adjustments: |  |  |
Increase in deferred revenue | 214 | 123 | 108
Increase in trade and other receivables | (106) | (70) | (132)
(Decrease)/increase in trade and other payables | (45) | 31 | 121
Other adjustments | (7) | (5) | 4
Working capital and other adjustments | 56 | 79 | 101
Cash flows relating to exceptional items | 8 | (29) | (43)
Contract acquisition costs, net of repayments | (237) | (101) | (64)
Total adjustments | 521 | 469 | 585
Cash flow from operations | 1,149 | 1,219 | 961
Excluding exceptional items [member] |  |  |
Operating profit adjustments: |  |  |
Share of profits of associates and joint ventures (before exceptional items) | $ (10) | $ (13) | $ (1)

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