Financial instruments - Fair values and risk management - Liquidity and capital management (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 |
| Net cash inflow (outflow) in relation to property, plant and equipment | (1,900.0) | (1,600.0) | (2,400.0) |
| Repayment of borrowings | 1,190.0 | 50.0 | 1,100.5 |
| Share buybacks | 536.1 | 1,481.7 | |
| Cash and liquid resources | |||
| Disclosure of detailed information about financial instruments [line items] | |||
| Current financial assets | € 3,600.0 | € 4,000.0 | € 4,200.0 |