Employee benefits (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| IfrsStatementLineItems [Line Items] | ||
| Current liabilities | $ 1,133 | $ 1,012 |
| Non-current liabilities | 1,214 | 1,118 |
| Payroll Related Charges And Other Remunerations [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Current liabilities | 1,014 | 934 |
| Share Based Payment [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Current liabilities | 51 | 16 |
| Employee Postretirement Obligation Provision [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Current liabilities | 68 | 62 |
| Non-current liabilities | $ 1,214 | $ 1,118 |