Disclosure Of Leases [Text Block]
| Concept | As at 2023-12-31 | As at 2022-12-31 | 
|---|---|---|
| Disclosure of leases [text block] | — | — | 
| Presentation of leases for lessee [abstract] | ||
| Lease liabilities [abstract] | ||
| Current lease liabilities | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                744,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Non-current lease liabilities | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                4 454
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             |