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Finance expenses (Details) - EUR (€)
€ in Millions
12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Mar. 31, 2020
Finance expense      
Interest expense € 91.4 € 69.8 € 72.9
Hedge discontinuance and ineffectiveness   227.3 407.2
Finance expense € 91.4 € 297.1 € 480.1