Operating Expenses - Additional Information (Details) - EUR (€) € in Millions |
12 Months Ended | ||
|---|---|---|---|
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2023 |
|
| German Govermental Plan | |||
| Disclosure of attribution of expenses by nature to their function [line items] | |||
| Employers contribution to pension plan percent | 9.30% | ||
| Employers contribution to pension plan amount | € 19.0 | € 17.5 | € 15.0 |
| DC plans US | |||
| Disclosure of attribution of expenses by nature to their function [line items] | |||
| Employers contribution to pension plan amount | 2.2 | 1.9 | 1.6 |
| Selling and Distribution Expenses | |||
| Disclosure of attribution of expenses by nature to their function [line items] | |||
| Selling and marketing expenses | 184.5 | 159.2 | 129.5 |
| Logistics expenses | € 148.4 | € 149.6 | € 89.4 |