v3.26.1
Issued share capital, share premium account and share options - Share options and share purchase arrangements (Details)
shares in Millions, Options in Millions
12 Months Ended 96 Months Ended
Mar. 31, 2026
Options
€ / shares
Mar. 31, 2025
Options
€ / shares
Mar. 31, 2024
Options
€ / shares
Mar. 31, 2026
Options
shares
€ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Share options outstanding at beginning of year | Options 16.2 16.6 18.7  
Share options forfeited | Options     (0.7)  
Share options exercised | Options (0.3) (0.4) (1.4)  
Share options outstanding at end of year | Options 15.9 16.2 16.6 15.9
Weighted average exercise price, share options outstanding at beginning of year | € / shares € 11.12 € 11.18 € 11.24  
Weighted average exercise price, share options forfeited | € / shares     11.12  
Weighted average exercise price, share options exercised | € / shares 11.12 11.45 12  
Weighted average exercise price, share options outstanding at end of year | € / shares € 11.12 € 11.12 € 11.18 € 11.12
LTIP 2019        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Number of shares granted in share-based payment arrangement | shares       2.6
Option plan 2013 | Maximum        
Disclosure of terms and conditions of share-based payment arrangement [line items]        
Maximum percentage of shares issued under plan in relation to outstanding ordinary shares 5.00%