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Reconciliation of profit/(loss) for the year to cash flow from operations - Summary of Reconciliation of Profit/(Loss) for the Year to Cash Flow From Operations (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Reconciliation of (loss)/profit or loss to net cash flows from operating activities [abstract] |  |  |
Profit/(loss) for the year | $ 265 | $ (260) | $ 386
Adjustments for: |  |  |
Net financial expenses | 139 | 140 | 115
Fair value gains on contingent purchase consideration | (6) | (13) | (27)
Income tax charge/(credit) | 96 | (20) | 156
Operating profit adjustments: |  |  |
Impairment loss on financial assets | 0 | 88 | 8
Other impairment charges | 4 | 226 | 131
Other operating exceptional items | 25 | (4) | 55
Depreciation and amortisation | 98 | 110 | 116
Operating profit adjustments | 127 | 420 | 310
Contract assets deduction in revenue | 35 | 25 | 21
Share-based payments cost | 28 | 21 | 30
Share of losses of associates and joint ventures | 8 | 14 | 3
Other adjustments for non-cash items | 71 | 60 | 54
System Fund adjustments: |  |  |
Depreciation and amortisation | 94 | 62 | 54
Impairment (reversal)/loss on financial assets | (6) | 24 | 12
Other impairment (reversals)/charges | (3) | 41 |
Other operating exceptional items |  | 20 | 28
Share-based payments cost | 13 | 11 | 12
Share of losses of associates | 2 | 1 |
System fund adjustments | 100 | 159 | 106
Working capital and other adjustments: |  |  |
Increase in deferred revenue | 39 | 1 | 57
Decrease in inventories | 1 | 1 |
(Increase)/decrease in trade and other receivables | (75) | 38 | (70)
Increase/(decrease) in trade and other payables | 153 | (69) | (63)
Other adjustments | (8) | 2 | (1)
Working capital and other adjustments | 110 | (27) | (77)
Cash flows relating to exceptional items | (12) | (87) | (55)
Contract acquisition costs, net of repayments | (42) | (64) | (61)
Total adjustments | 583 | 568 | 521
Cash flow from operations | $ 848 | $ 308 | $ 907

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