Retirement benefits - Narrative (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2026 |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Disclosure of defined benefit plans [line items] | |||
| Return on plan assets excluding interest income or expense, before tax, defined benefit plans | $ 31 | $ 40 | |
| Employer contributions | 2 | $ 18 | |
| Net defined benefit liability | $ 101 | ||
| Weighted average duration of defined benefit obligation | 17 years | 18 years | |
| Post-employment benefit expense, defined contribution plans | $ 37 | $ 35 | |
| Forecast | |||
| Disclosure of defined benefit plans [line items] | |||
| Employer contributions | $ 22 | ||
| Pension defined benefit plans | |||
| Disclosure of defined benefit plans [line items] | |||
| Employer contributions | 37 | 43 | |
| Net defined benefit liability | 83 | 78 | |
| Net defined benefit (liability) asset | $ 31 | $ 17 | |
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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. No definition available.
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- Definition The amount of employer contributions to retirement benefit plans. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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 [domain]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of post-employment benefit expense included in profit or loss relating to defined benefit plans. [Refer: Profit (loss); Defined benefit plans [domain]] [Contrast: Increase (decrease) in net defined benefit liability (asset) resulting from expense (income) in profit or loss] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of deficit in a defined benefit plan. [Refer: Defined benefit plans [domain]] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of other comprehensive income, before tax, resulting from the return on plan assets, excluding amounts included in interest expense (income) arising from defined benefit plans. 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: Other comprehensive income; Defined benefit plans [domain]; Plan assets [member]; Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans] [Contrast: Decrease (increase) in net defined benefit liability (asset) resulting from return on plan assets excluding interest income or expense] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The weighted average duration of a defined benefit obligation. [Refer: Weighted average [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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