Financial risk management (Details 5) - USD ($) $ in Millions |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2026 |
Dec. 31, 2025 |
|
| IfrsStatementLineItems [Line Items] | ||
| Cumulative losses in other comprehensive income (shareholders' equity) | $ (10,493) | $ (13,845) |
| Cash flow hedges [member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Cumulative losses in other comprehensive income (shareholders' equity) | (15,895) | (20,974) |
| Deferred Income Taxes [Member] | ||
| IfrsStatementLineItems [Line Items] | ||
| Cumulative losses in other comprehensive income (shareholders' equity) | $ 5,402 | $ 7,129 |