Leases - Leases as lessee (Details) |
6 Months Ended |
|---|---|
Mar. 31, 2026 | |
| Buildings | |
| Disclosure of quantitative information about right-of-use assets [line items] | |
| Average lease term | 5 years |
| IT equipment | |
| Disclosure of quantitative information about right-of-use assets [line items] | |
| Average lease term | 3 years |