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Employee benefits (Details 3) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 | Dec. 31, 2023
IfrsStatementLineItems [Line Items] |  |
Current provisions for employee benefits | $ 724 | $ 964
Overfunded Pension Plans [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Benefit obligation (Plan assets) as at beginning of the year | 1,071 | 1,114
Interest income | 38 | 103
Changes on asset ceiling | (125) | (192)
Translation adjustment | (109) | 73
Transfer |  | (27)
Benefit obligation (Plan assets) as at ending of the year | 875 | 1,071
Net defined benefit liability (asset) | 60 | 68
Non-current provisions for employee benefits | 60 | 68
Provisions for employee benefits | 60 | 68
Overfunded Pension Plans [Member] | Present Value Of Defined Benefit Obligations [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Net defined benefit liability (asset) | (4,308) | (4,517)
Overfunded Pension Plans [Member] | Plan assets [member] |  |
IfrsStatementLineItems [Line Items] |  |
Net defined benefit liability (asset) | 5,243 | 5,656
Overfunded Pension Plans [Member] | Effect of asset ceiling [member] |  |
IfrsStatementLineItems [Line Items] |  |
Net defined benefit liability (asset) | (875) | (1,071)
Underfunded Pension Plans [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Interest income |  | 1
Changes on asset ceiling |  | (28)
Transfer |  | 27
Net defined benefit liability (asset) | (1,291) | (1,451)
Current provisions for employee benefits | (70) | (70)
Non-current provisions for employee benefits | (1,221) | (1,381)
Provisions for employee benefits | (1,291) | (1,451)
Underfunded Pension Plans [Member] | Present Value Of Defined Benefit Obligations [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Net defined benefit liability (asset) | (1,613) | (2,266)
Underfunded Pension Plans [Member] | Plan assets [member] |  |
IfrsStatementLineItems [Line Items] |  |
Net defined benefit liability (asset) | $ 322 | $ 815

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- Definition The amount of current provisions for employee benefits. [Refer: Provisions for employee benefits] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2023-01-01 -Paragraph 78 -Subparagraph d -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_78_d&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from the gain (loss) on changes in the effect of limiting a net defined benefit asset to the asset ceiling, excluding amounts included in interest income or expense. [Refer: Interest income (expense); Net defined benefit liability (asset); Increase (decrease) in net defined benefit liability (asset) resulting from interest expense (income)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph c -Clause iv -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_c_iv&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from changes in foreign exchange rates. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_e&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The increase (decrease) in the net defined benefit liability (asset) resulting from the passage of time. [Refer: Interest expense; Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2023-01-01 -Paragraph 141 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2023-en-r&anchor=para_141_b&doctype=Standard -URIDate 2023-03-23 + Details
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