Basis of preparation (Details) $ in Millions, $ in Millions |
1 Months Ended | 6 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
|
Feb. 28, 2026
AUD ($)
shares
|
Feb. 28, 2026
USD ($)
shares
|
Dec. 31, 2025
shares
|
Jun. 30, 2025
shares
|
Jun. 30, 2024
shares
|
|
| Basis of Consolidation [Abstract] | |||||
| Ownership interest | 100.00% | 100.00% | |||
| Going Concern [Abstract] | |||||
| Number of ordinary shares issued, fully paid (in shares) | 2,674,633,957 | 2,608,172,516 | 2,325,614,708 | ||
| Events After Reporting Period [Member] | |||||
| Going Concern [Abstract] | |||||
| Proceeds from issue of ordinary shares | $ 72 | $ 50 | |||
| Number of ordinary shares issued, fully paid (in shares) | 400,000,000 | 400,000,000 | |||