Disclosure Of Leases [Text Block]
| Concept | As at 2024-12-31 | As at 2023-12-31 | 
|---|---|---|
| Disclosure of leases [text block] | — | — | 
| Presentation of leases for lessee [abstract] | ||
| Right-of-use assets | 
                                                559,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                560,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Disclosure of quantitative information about leases for lessee [abstract] | ||
| Disclosure of quantitative information about right-of-use assets [text block] | — | — | 
| Disclosure of quantitative information about right-of-use assets [abstract] | ||
| Disclosure of quantitative information about right-of-use assets [line items] | ||
| Reconciliation of changes in right-of-use assets [abstract] |