Related party transactions (Details) - USD ($) |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Related party borrowings and receivables | |||||
| Lease liabilities | $ 325,000,000 | $ 325,000,000 | $ 368,000,000 | ||
| AGSA | |||||
| Related party borrowings and receivables | |||||
| Net charge | 10,000,000 | $ 10,000,000 | 19,000,000 | $ 19,000,000 | |
| Net Movement In Working Capital | (7,000,000) | $ (4,000,000) | (6,000,000) | $ (1,000,000) | |
| Lease liabilities | $ 1,000,000 | $ 1,000,000 | $ 1,000,000 | ||