Profit Or Loss [Abstract]
| Concept | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 
|---|---|---|---|---|---|---|---|---|
| Profit or loss [abstract] | ||||||||
| Profit (loss) [abstract] | ||||||||
| Revenue | 
                                                17,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
                                                17,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
| Cost of sales | 
                                                4,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
                                                2,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
| Distribution costs | 
                                                5,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
                                                5,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
| Profit (loss) from operating activities | 
                                                59,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
                                                4,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
| Share of profit (loss) of associates and joint ventures accounted for using equity method | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
                                                2,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
| Tax expense (income) | 
                                                1,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
                                                2,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
| Profit (loss) from continuing operations | 
                                                536,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
                                                10,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
| Profit (loss) from discontinued operations | 
                                                8 028
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
                                                423,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
| Profit (loss) | 
                                                8 564
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                6 621
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1 943
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1 943
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                141,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                413,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                141,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                272,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Profit (loss), attributable to [abstract] | ||||||||
| Profit (loss), attributable to owners of parent | 
                                                1 943
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
                                                141,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
| Profit (loss), attributable to non-controlling interests | 
                                                6 621
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
                                                272,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | 
| Earnings per share [text block] | — | — | — | — | — | — | — | — | 
| Earnings per share [abstract] | ||||||||
| Earnings per share [line items] | ||||||||
| Basic earnings per share [abstract] | ||||||||
| Basic earnings (loss) per share from continuing operations | 
                                                3,106.00
                                                
                                             | — | — | — | — | 
                                                81.00
                                                
                                             | — | — | 
| Basic earnings (loss) per share from discontinued operations | 
                                                17,613.00
                                                
                                             | — | — | — | — | 
                                                1,581.00
                                                
                                             | — | — | 
| Basic earnings (loss) per share | 
                                                20,719.00
                                                
                                             | — | — | — | — | 
                                                1,500.00
                                                
                                             | — | — | 
| Diluted earnings per share [abstract] | ||||||||
| Diluted earnings (loss) per share from continuing operations | 
                                                3,106.00
                                                
                                             | — | — | — | — | 
                                                81.00
                                                
                                             | — | — | 
| Diluted earnings (loss) per share from discontinued operations | 
                                                17,613.00
                                                
                                             | — | — | — | — | 
                                                1,581.00
                                                
                                             | — | — | 
| Diluted earnings (loss) per share | 
                                                20,719.00
                                                
                                             | — | — | — | — | 
                                                1,500.00
                                                
                                             | — | — |