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Financial risk management -Additional information (Detail) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Disclosure Of Financial Risk Management [Line Items] |  |
Borrowings With Floating Interest Rates | 42.00% | 69.00%
Undrawn Borrowing Facilities | $ 13 | $ 13

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- Definition The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_7&doctype=Standard -URIDate 2022-03-24 + Details
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Period Type: | instant

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- Definition The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2022-03-24 -Paragraph 50 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=7&code=ifrs-tx-2022-en-r&anchor=para_50_a&doctype=Standard -URIDate 2022-03-24 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Disclosure of financial risk management. + References No definition available. + Details
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