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Segmental information - Summary of Information by Reportable Segment - Other Segmental Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Disclosure of reportable segments [line items] |  |  |
Capital expenditure per management reporting | $ 336 | $ 238 | $ 262
Depreciation and amortisation | 103 | 96 | 96
Share-based payments cost | 21 | 17 | 19
Share of losses/(gains) of associates and joint ventures | (3) | 2 | 3
Impairment charges | 18 | 16 | 36
Americas [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Capital expenditure per management reporting | 120 | 67 | 87
Depreciation and amortisation | 31 | 25 | 23
Share of losses/(gains) of associates and joint ventures | 1 | 7 | 5
Impairment charges | 18 | 16 | 27
Europe [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Capital expenditure per management reporting | 18 | 15 | 45
Depreciation and amortisation | 10 | 10 | 10
AMEA [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Capital expenditure per management reporting | 8 | 7 | 8
Depreciation and amortisation | 6 | 5 | 6
Share of losses/(gains) of associates and joint ventures | (4) | (5) | (2)
Impairment charges |  |  | 9
Greater China [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Capital expenditure per management reporting | 2 | 1 | 4
Depreciation and amortisation | 3 | 3 | 8
Central [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Capital expenditure per management reporting | 188 | 148 | 118
Depreciation and amortisation | 53 | 53 | 49
Share-based payments cost | $ 21 | $ 17 | $ 19

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