Profit Or Loss [Abstract]
| Concept | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 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 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Profit or loss [abstract] | ||||||||||||
| Profit (loss) [abstract] | ||||||||||||
| Revenue | — | 
                                                7,262,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                6,846,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
| Cost of sales | — | 
                                                5,024,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                4,043,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
| Gross profit | — | 
                                                2,238,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                2,803,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
| Other income | — | 
                                                84,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                269,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
| Administrative expenses | — | 
                                                384,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                306,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
| Other expense, by function | — | 
                                                5,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                160,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
| Profit (loss) from operating activities | — | 
                                                945,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                1,435,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
| Finance income | — | 
                                                99,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                97,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
| Finance costs | — | 
                                                438,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                497,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
| Impairment loss (impairment gain and reversal of impairment loss) determined in accordance with IFRS 9 | — | 
                                                79,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                1,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
| Profit (loss) before tax | — | 
                                                465,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                1,063,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
| Tax expense (income) | — | 
                                                202,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                207,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | 
| Profit (loss) | 
                                                –
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                264,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                264,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,270,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,270,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Profit (loss), attributable to [abstract] | ||||||||||||
| Profit (loss), attributable to owners of parent | — | 
                                                264,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | 
                                                1,270,000,000
                                                
                                                    
                                                        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 | — | 
                                                66.00
                                                
                                             | — | — | — | — | — | 
                                                320.00
                                                
                                             | — | — | — | — | 
| Diluted earnings per share [abstract] | ||||||||||||
| Diluted earnings (loss) per share | — | 
                                                66.00
                                                
                                             | — | — | — | — | — | 
                                                320.00
                                                
                                             | — | — | — | — |