Property, plant and equipment (Details 3) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Property, plant and equipment [abstract] | ||
| Opening balance | $ 409 | $ 577 |
| Additions/(Write-offs) on PP&E | (35) | (353) |
| Other income and expenses | 21 | 676 |
| Indexation charges | (27) | |
| Payments made | (161) | |
| Cash inflow | 595 | |
| Translation adjustments | 30 | 97 |
| Closing balance | $ 832 | $ 997 |