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Financial instruments - Summary of changes in fair value of Level 3 financial assets and financial liabilities (Detail) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2023 | Dec. 31, 2022
Disclosure of detailed information about financial instruments [line items] |  |
Currency translation adjustments | $ (98) | $ (841)
Level 3 |  |
Disclosure of detailed information about financial instruments [line items] |  |
Opening balance | 131 |
Currency translation adjustments | (6) |
Total realised gains/(losses) included in consolidated sales revenue | 5 |
Total realised gains/(losses) included in net operating costs | (13) |
Total unrealised gains included in net operating costs | 66 |
Total unrealised gains transferred into other comprehensive income through cash flow hedges | 49 |
Additions to financial assets/(liabilities) | 13 |
Disposals/maturity of financial instruments | (11) |
Closing balance | 234 | $ 131
Net gains included in the income statement for assets and liabilities held at period end | $ 70 |

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- Definition The increase in the fair value measurement of assets resulting from purchases of those assets. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2023-01-01 -Paragraph 93 -Subparagraph e -Clause iii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2023-en-r&anchor=para_93_e_iii&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition Gains (losses) recognised in profit or loss for assets and liabilities held. + References No definition available. + Details
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- Definition Total realised gains or losses related to Level 3 financial assets and liabilities included in consolidated sales revenue. + References No definition available. + Details
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- Definition Total realised gains or losses related to Level 3 financial assets and liabilities included in net operating costs. + References No definition available. + Details
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