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Employee benefit obligations - Benefits (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of defined benefit plans [line items] |  |  |
Defined contribution plans expense | $ 21 | $ 19 | $ 17
Not later than one year [member] |  |  |
Disclosure of defined benefit plans [line items] |  |  |
Estimate Of Contributions Expected To Be Paid To Defined Contribution Plan | $ 21 | $ 18 |

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- Definition The estimate of the expected contributions to be made to a defined contribution plan. + References No definition available. + Details
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Balance Type: | credit
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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 amount of post-employment benefit expense relating to defined contribution plans. Defined contribution plans are post-employment benefit plans under which an entity pays fixed contributions into a separate entity (a fund) and will have no legal or constructive obligation to pay further contributions if the fund does not hold sufficient assets to pay all employee benefits relating to employee service in the current and prior periods. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 53 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_53&doctype=Standard -URIDate 2024-03-27 + Details
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- Details
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