Financial instruments - Fair values and risk management - Interest rate re-pricing (Details) - EUR (€) € in Millions |
12 Months Ended | ||
|---|---|---|---|
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
|
| Disclosure of detailed information about financial instruments [line items] | |||
| Current financial assets | € 3,577.0 | € 3,986.5 | € 4,119.6 |
| Cash and cash equivalents | |||
| Disclosure of detailed information about financial instruments [line items] | |||
| Current financial assets | 2,733.4 | 3,863.3 | 3,875.4 |
| Cash > 3 months | |||
| Disclosure of detailed information about financial instruments [line items] | |||
| Current financial assets | 812.4 | 100.1 | 237.8 |
| Restricted cash | |||
| Disclosure of detailed information about financial instruments [line items] | |||
| Current financial assets | € 31.2 | € 23.1 | € 6.4 |
| Cash and liquid resources | |||
| Disclosure of detailed information about financial instruments [line items] | |||
| Weighted average interest rate on financial assets | 2.20% | 2.90% | 4.20% |
| Current financial assets | € 3,600.0 | € 4,000.0 | € 4,200.0 |