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 | 
|---|---|---|---|
| Disclosure of revenue from contracts with customers [text block] | — |  | — | 
| Contract assets [abstract] | |||
| Current contract assets | 
                                                360,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
                                                516,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Contract liabilities [abstract] | |||
| Current contract liabilities | 
                                                25,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | 
                                                2,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             |