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Post-employment benefits for associates - Schedule of expected future cash flows (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2020 USD ($)
Pension plans [member] |
Expected employer contributions to funded plans |
2021 (estimated) | $ 11
Other post-employment benefit plans [member] |
Expected employer contributions to funded plans |
2021 (estimated) | 0
2021 | Pension plans [member] |
Expected future benefit payments |
Expected future benefit payments | 44
2021 | Other post-employment benefit plans [member] |
Expected future benefit payments |
Expected future benefit payments | 19
2022 | Pension plans [member] |
Expected future benefit payments |
Expected future benefit payments | 26
2022 | Other post-employment benefit plans [member] |
Expected future benefit payments |
Expected future benefit payments | 21
2023 | Pension plans [member] |
Expected future benefit payments |
Expected future benefit payments | 28
2023 | Other post-employment benefit plans [member] |
Expected future benefit payments |
Expected future benefit payments | 22
2024 | Pension plans [member] |
Expected future benefit payments |
Expected future benefit payments | 32
2024 | Other post-employment benefit plans [member] |
Expected future benefit payments |
Expected future benefit payments | 23
2025 | Pension plans [member] |
Expected future benefit payments |
Expected future benefit payments | 32
2025 | Other post-employment benefit plans [member] |
Expected future benefit payments |
Expected future benefit payments | 23
2026-2030 | Pension plans [member] |
Expected future benefit payments |
Expected future benefit payments | 185
2026-2030 | Other post-employment benefit plans [member] |
Expected future benefit payments |
Expected future benefit payments | $ 110

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- Definition Defined Benefit Plan, Expected Future Employer Contributions1 [Abstract] + References No definition available. + Details
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- Definition The estimate of the expected contributions to be made to a defined benefit plan for the next annual reporting period. [Refer: Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 147 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_147_b&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 148 -Subparagraph d -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_148_d_iii&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The decrease (increase) in the net defined benefit liability (asset) resulting from payments from the plan in respect of settlements. [Refer: Gains (losses) arising from settlements, net defined benefit liability (asset); Net defined benefit liability (asset); Defined benefit plans [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 141 -Subparagraph g -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_141_g&doctype=Standard -URIDate 2020-01-01 + Details
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