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Financial assets and liabilities - Net Investments hedges in foreign operations (Details) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2025 USD ($) | Dec. 31, 2024 USD ($)
Disclosure of detailed information about financial instruments [line items] |  |
Gain (loss) recognised in relation to this hedge. | $ 41,000,000 |
6.000% Senior Secured Green Notes | Hedges of net investment in foreign operations |  |
Disclosure of detailed information about financial instruments [line items] |  |
Net investment hedge | 291,000,000 | 350,000,000
Gain (loss) recognised in relation to this hedge. |  | $ (11,000,000)

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