Disclosure Of Financial Instruments [Text Block]
| Concept | 2024-01-01 to 2024-12-31 | 2023-01-01 to 2023-12-31 | 2022-01-01 to 2022-12-31 | 
|---|---|---|---|
| Disclosure of financial instruments [text block] | — | — | — | 
| Income, expense, gains or losses of financial instruments [abstract] | |||
| Gains (losses) on financial instruments [abstract] | |||
| Other comprehensive income, before tax, gains (losses) from investments in equity instruments | 
                                                21,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                20,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                32,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Disclosure of general hedge accounting [text block] | — | — | — | 
| Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [text block] | — | — | — | 
| Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [abstract] | |||
| Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] | |||
| Reclassification adjustments on cash flow hedges, net of tax | 
                                                29,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                19,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                63,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             |