Disclosure Of Income Tax [Text Block]
| Concept | 
                                    
                                        2023-04-01 to 2024-03-31  | 
                            
                                
                                    
                                        As at 2024-03-31  | 
                            
                                
                                    
                                        As at 2023-03-31  | 
                            
                                
                                    
                                        2022-04-01 to 2023-03-31  | 
                            
                        
|---|---|---|---|---|
| Disclosure of income tax [text block] | 
                                        
                                             | 
                                
                                    — | — | — | 
| Major components of tax expense (income) [abstract] | ||||
| Tax expense (income) | 
                                        
                                             
                                                1,934,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | — | 
                                        
                                             
                                                4,120,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Income tax relating to components of other comprehensive income [abstract] | ||||
| Income tax relating to cash flow hedges included in other comprehensive income | 
                                        
                                             
                                                103,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | — | 
                                        
                                             
                                                221,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Disclosure of temporary difference, unused tax losses and unused tax credits [text block] | — | — | — | — | 
| Disclosure of temporary difference, unused tax losses and unused tax credits [abstract] | ||||
| Disclosure of temporary difference, unused tax losses and unused tax credits [line items] | ||||
| Deferred tax assets and liabilities [abstract] | ||||
| Deferred tax liabilities | — | 
                                        
                                             
                                                49,560,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                50,337,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Reconciliation of accounting profit multiplied by applicable tax rates [abstract] |