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Risks arising from Financial instruments - Summary of Hedging Reserve and Hedging Instruments (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Disclosure of detailed information about hedging instruments [line items] |  |
As per 1 January | $ 145 | $ 481
Change in fair value of hedging instrument recognized in OCI | (434) | 183
Reclassified to profit or loss / cost of inventory | 470 | (518)
As per 31 December | 181 | 145
Foreign currency futures [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
As per 1 January | 491 | 679
Change in fair value of hedging instrument recognized in OCI | (237) | 143
Reclassified to profit or loss / cost of inventory | 102 | (331)
As per 31 December | 356 | 491
Commodity Contracts [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
As per 1 January | (476) | (306)
Change in fair value of hedging instrument recognized in OCI | (197) | 39
Reclassified to profit or loss / cost of inventory | 368 | (208)
As per 31 December | (304) | (476)
Other hedging instrument [member] |  |
Disclosure of detailed information about hedging instruments [line items] |  |
As per 1 January | 131 | 111
Reclassified to profit or loss / cost of inventory | 0 | 22
As per 31 December | $ 131 | $ 131

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- Definition Hedge reserve + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The gains (losses) on hedging instruments in fair value hedges. [Refer: Fair value hedges [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expired 2023-01-01 -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 24 -Subparagraph a -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_24_a_i&doctype=Standard&book=b -URIDate 2023-03-23 + Details
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- Definition The gains (losses) on the ineffective portion of cash flow hedges recognised in profit or loss. [Refer: Cash flow hedges [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expired 2023-01-01 -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 24 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_24_b&doctype=Standard&book=b -URIDate 2023-03-23 + Details
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Period Type: | duration

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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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Namespace Prefix: |
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- Details
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Period Type: |