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v3.23.1

Employee benefits - Evolution of assets fair value (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021
Overfunded Pension Plans [Member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Benefit obligation (Plan assets) as at beginning of the year |  | $ 919 | [1] | $ 864
Interest income |  | 84 | [1] | 58
Translation adjustment |  | 46 | [1] | (63)
Benefit obligation (Plan assets) as at end of the year | [1] | 1,114 |  | 919
Overfunded Pension Plans [Member] | Plan assets [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Benefit obligation (Plan assets) as at beginning of the year |  | 3,752 |  | 3,969
Interest income |  | 412 |  | 253
Employer contributions |  | 45 |  | 29
Benefits paid |  | (534) |  | (235)
Return on plan assets (excluding interest income) |  | (752) |  | (269)
Translation adjustment |  | 44 |  | (276)
Transfers |  | 3,373 |  | 281
Benefit obligation (Plan assets) as at end of the year |  | 6,340 |  | 3,752
Underfunded Pension Plans [Member] | Plan assets [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Benefit obligation (Plan assets) as at beginning of the year |  | 3,779 |  | 3,992
Interest income |  | 17 |  | 102
Employer contributions |  | 14 |  | 40
Benefits paid |  | (58) |  | (257)
Return on plan assets (excluding interest income) |  | (31) |  | 181
Translation adjustment |  | (9) |  | 2
Transfers |  | (3,373) |  | (281)
Benefit obligation (Plan assets) as at end of the year |  | 339 |  | 3,779
Other Benefits [Member] | Plan assets [member] |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |
Benefit obligation (Plan assets) as at beginning of the year |  |  |  |
Employer contributions |  | 57 |  | 56
Benefits paid |  | (57) |  | (56)
Benefit obligation (Plan assets) as at end of the year |  |  |  |
[1] | The pension plan asset is recorded as “Other non-current assets” in the balance sheet.

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- Definition The decrease (increase) in net defined benefit liability (asset) resulting from contributions to a defined benefit plan by the employer. [Refer: Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 141 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_141_f&doctype=Standard -URIDate 2022-03-24 + 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 2022-03-24 -Paragraph 141 -Subparagraph e -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_141_e&doctype=Standard -URIDate 2022-03-24 + 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 2022-03-24 -Paragraph 141 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_141_b&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 140 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_140_a&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from payments from the plan. [Refer: Net defined benefit liability (asset)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2022-03-24 -Paragraph 141 -Subparagraph g -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_141_g&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from the return on plan assets, excluding amounts included in interest income or expense. The return on plan assets is interest, dividends and other revenue derived from the plan assets, together with realised and unrealised gains or losses on the plan assets, less any costs of managing plan assets and less any tax payable by the plan itself, other than tax included in the actuarial assumptions used to measure the present value of the defined benefit obligation. [Refer: Plan assets [member]; Net defined benefit liability (asset); Actuarial assumptions [member]; 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 2022-03-24 -Paragraph 141 -Subparagraph c -Clause i -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2022-en-r&anchor=para_141_c_i&doctype=Standard -URIDate 2022-03-24 + Details
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