Disclosure Of Impairment Of Assets [Text Block]
| Concept | 
                                    
                                        As at 2024-12-31  | 
                            
                                
                                    
                                        As at 2023-12-31  | 
                            
                        
|---|---|---|
| Disclosure of impairment of assets [text block] | — | — | 
| Disclosure of information for cash-generating units [text block] | — | — | 
| Disclosure of information for cash-generating units [abstract] | ||
| Disclosure of information for cash-generating units [line items] | ||
| Goodwill | 
                                        
                                             
                                                880,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                872,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             
                                        
                                     |