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Capital and other commitments - Summary of Capital and Other Commitments (Detail) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Disclosure of contractual capital commitments [line items] |  |
Capital and other commitments | $ 17 | $ 19
Property, plant and equipment [member] |  |
Disclosure of contractual capital commitments [line items] |  |
Capital and other commitments | 13 | 17
Intangible assets [member] |  |
Disclosure of contractual capital commitments [line items] |  |
Capital and other commitments | $ 4 | $ 2

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- Definition The amount of capital commitments for which the entity has entered into a contract. [Refer: Capital commitments] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard -URIDate 2021-03-24 + Details
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Period Type: | instant

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- Definition Disclosure of contractual capital commitments. + References No definition available. + Details
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
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