Segment Information - Schedule of Non-current Assets By Geographical Location (Details) - EUR (€) € in Thousands |
Sep. 30, 2024 |
Sep. 30, 2023 |
|---|---|---|
| Disclosure of geographical areas [line items] | ||
| Allocated non-current assets | € 3,688,933 | € 3,702,306 |
| Other financial assets | 3,290 | 4,171 |
| Deferred tax assets (unallocated) | 117 | 0 |
| Total non-current assets | 3,721,659 | 3,746,924 |
| Unallocated | ||
| Disclosure of geographical areas [line items] | ||
| Other financial assets | 32,609 | 44,618 |
| Deferred tax assets (unallocated) | 117 | 0 |
| Germany | ||
| Disclosure of geographical areas [line items] | ||
| Allocated non-current assets | 1,836,281 | 1,800,979 |
| United States | ||
| Disclosure of geographical areas [line items] | ||
| Allocated non-current assets | 1,526,573 | 1,582,958 |
| Rest of world | ||
| Disclosure of geographical areas [line items] | ||
| Allocated non-current assets | € 326,079 | € 318,369 |