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Segmental Information - Summary of Information by Reportable Segment - Reconciliation of Capital Expenditure (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of reportable segments [line items] |  |
Capital expenditure per management reporting | $ 100 | $ 148
Contract acquisition costs | 45 | 74
Timing differences and other adjustments | 2 | 20
Additions per the Financial Statements | 59 | 104
Comprising additions to: |  |
Goodwill and other intangible assets | 33 | 52
Property, plant and equipment | 17 | 30
Investment in associates and joint ventures | 4 | 17
Other financial assets | 5 | 5
Additions per the Group Financial Statements | 59 | 104
Key money paid [member] |  |
Disclosure of reportable segments [line items] |  |
Contract acquisition costs | (43) | (64)
Americas [member] |  |
Disclosure of reportable segments [line items] |  |
Capital expenditure per management reporting | 35 | 46
Contract acquisition costs | (32) | (33)
Timing differences and other adjustments | 3 | 17
Additions per the Financial Statements | 6 | 30
Comprising additions to: |  |
Goodwill and other intangible assets | 1 | 1
Property, plant and equipment | 1 | 12
Investment in associates and joint ventures | 4 | 17
Additions per the Group Financial Statements | 6 | 30
EMEAA [member] |  |
Disclosure of reportable segments [line items] |  |
Capital expenditure per management reporting | 25 | 44
Contract acquisition costs | (10) | (29)
Timing differences and other adjustments | (5) | 4
Additions per the Financial Statements | 10 | 19
Comprising additions to: |  |
Goodwill and other intangible assets | 0 | 1
Property, plant and equipment | 5 | 13
Other financial assets | 5 | 5
Additions per the Group Financial Statements | 10 | 19
Greater China [member] |  |
Disclosure of reportable segments [line items] |  |
Capital expenditure per management reporting | 1 | 2
Contract acquisition costs | (1) | (2)
Central [member] |  |
Disclosure of reportable segments [line items] |  |
Capital expenditure per management reporting | 39 | 56
Timing differences and other adjustments | 4 | (1)
Additions per the Financial Statements | 43 | 55
Comprising additions to: |  |
Goodwill and other intangible assets | 32 | 50
Property, plant and equipment | 11 | 5
Additions per the Group Financial Statements | $ 43 | $ 55

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- Definition The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Business combinations [member]; Property, plant and equipment] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2021-01-01 -Paragraph 73 -Subparagraph e -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2021-en-r&anchor=para_73_e_i&doctype=Standard -URIDate 2021-03-24 + Details
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