Finance leases - Schedule of Supplemental Lease Information (Details) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
|
| Leases [Abstract] | ||
| Operating cash flows – interest paid | $ 6 | $ 0 |
| Financing cash flows – principal repaid | $ 30 | $ 0 |
| Weighted-average remaining lease term (in years) – finance leases | 1 year 9 months 18 days | 0 years |
| Weighted-average discount rate – finance leases | 9.90% | 0.00% |
| X | ||||||||||
- Definition Amount of interest paid on finance lease liability. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of cash outflow for principal payment on finance lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Weighted average discount rate for finance lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- References No definition available.
|