Disclosure Of Revenue From Contracts With Customers [Text Block]
| Concept | As at 2024-12-31 | 2024-01-01 to 2024-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-12-31 | 
|---|---|---|---|---|
| Disclosure of revenue from contracts with customers [text block] | — | — | — | — | 
| Contract assets [abstract] | ||||
| Current contract assets | 
                                                15,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
                                                20,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
| Contract liabilities [abstract] | ||||
| Non-current contract liabilities | 
                                                1,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
                                                0
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
| Current contract liabilities | 
                                                13,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
                                                10,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
| Revenue from contracts with customers | — | 
                                                1 865
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
                                                1 563
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Disclosure of disaggregation of revenue from contracts with customers [text block] | — | — | — | — | 
| Disclosure of disaggregation of revenue from contracts with customers [abstract] | ||||
| Disclosure of disaggregation of revenue from contracts with customers [line items] |