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Capital and other commitments - Summary of Capital and Other Commitments (Detail) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Disclosure of contractual capital commitments [line items] |  |
Capital and other commitments | $ 6 | $ 17
Property, plant and equipment [member] |  |
Disclosure of contractual capital commitments [line items] |  |
Capital and other commitments | 5 | 13
Intangible assets [member] |  |
Disclosure of contractual capital commitments [line items] |  |
Capital and other commitments | $ 1 | $ 4

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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 2022-03-24 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_112_c&doctype=Standard -URIDate 2022-03-24 + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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
Name: | ifrs-full_ClassesOfAssetsAxis=ifrs-full_IntangibleAssetsOtherThanGoodwillMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |