Statement Of Cash Flows [Abstract]
| Concept | 2024-01-01 to 2024-12-31 | 2023-01-01 to 2023-12-31 | 
|---|---|---|
| Statement of cash flows [abstract] | ||
| Cash flows from (used in) operating activities [abstract] | ||
| Adjustments for finance income (cost) | 
                                                339,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                400,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Cash flows from (used in) operations before changes in working capital | 
                                                901,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                2,017,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Increase (decrease) in working capital | 
                                                2,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,685,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Adjustments for depreciation and amortisation expense and impairment loss (reversal of impairment loss) recognised in profit or loss | 
                                                406,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                359,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss, trade and other receivables | 
                                                79,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Adjustments for impairment loss (reversal of impairment loss) recognised in profit or loss, inventories | 
                                                377,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                477,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Adjustments for gain (loss) on disposals, property, plant and equipment | 
                                                1,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Adjustments for undistributed profits of investments accounted for using equity method | 
                                                140,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                24,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Income taxes paid, classified as operating activities | 
                                                87,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                117,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Cash flows from (used in) investing activities [abstract] | ||
| Purchase of property, plant and equipment, intangible assets other than goodwill, investment property and other non-current assets | 
                                                287,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                334,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Purchase of financial instruments, classified as investing activities | 
                                                17,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                24,000,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             |