Provisions - Expected timing of outflow of economic benefits (Details) - Provision for aircraft maintenance on leased aircraft [Member] - EUR (€) € in Millions |
Mar. 31, 2026 |
Mar. 31, 2025 |
Mar. 31, 2024 |
Mar. 31, 2023 |
|---|---|---|---|---|
| Disclosure of other provisions [line items] | ||||
| Other provisions | € 201.6 | € 194.6 | € 184.1 | € 169.8 |
| Less than one year | ||||
| Disclosure of other provisions [line items] | ||||
| Other provisions | 60.3 | 53.5 | 46.0 | |
| Later than one year and not later than two years | ||||
| Disclosure of other provisions [line items] | ||||
| Other provisions | 34.8 | 14.5 | 17.4 | |
| Later than two years and not later than three years | ||||
| Disclosure of other provisions [line items] | ||||
| Other provisions | 65.8 | 42.2 | 3.8 | |
| Later than three years and not later than four years | ||||
| Disclosure of other provisions [line items] | ||||
| Other provisions | 50.9 | 35.1 | ||
| Thereafter | ||||
| Disclosure of other provisions [line items] | ||||
| Other provisions | € 40.7 | € 33.5 | € 81.8 |