Statement Of Financial Position [Abstract]
| Concept | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||||||||||||||||
| Property, plant and equipment | — | — | — | — | — | — | — | — | — | — | 
                                                13,994,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                14,258,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Right-of-use assets | — | — | — | — | — | — | — | — | — | — | 
                                                27,376,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                32,293,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Investment property | — | — | — | — | — | — | — | — | — | — | 
                                                3,963,832,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                4,910,925,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Intangible assets other than goodwill | — | — | — | — | — | — | — | — | — | — | 
                                                40,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                239,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Investments accounted for using equity method | — | — | — | — | — | — | — | — | — | — | 
                                                502,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,534,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Deferred tax assets | — | — | — | — | — | — | — | — | — | — | 
                                                54,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                138,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other non-current financial assets | — | — | — | — | — | — | — | — | — | — | 
                                                106,712,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                111,920,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Non-current assets | — | — | — | — | — | — | — | — | — | — | 
                                                4,141,478,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                5,184,598,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Current assets [abstract] | ||||||||||||||||||||||||||||||||
| Current inventories | — | — | — | — | — | — | — | — | — | — | 
                                                410,886,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                515,467,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Cash and cash equivalents | — | — | — | — | — | — | — | — | — | — | 
                                                246,990,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                377,419,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                386,985,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
| Current assets | — | — | — | — | — | — | — | — | — | — | 
                                                857,362,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,144,047,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Assets | — | — | — | — | — | — | — | — | — | — | 
                                                6,887,153,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                7,716,787,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Equity and liabilities [abstract] | ||||||||||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||||||||||
| Issued capital | — | — | — | — | — | — | — | — | — | — | 
                                                188,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                188,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Retained earnings | — | — | — | — | — | — | — | — | — | — | 
                                                1,352,066,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                2,278,087,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Share premium | — | — | — | — | — | — | — | — | — | — | 
                                                1,775,304,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,873,598,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other reserves | — | — | — | — | — | — | — | — | — | — | 
                                                186,601,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                175,445,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Equity attributable to owners of parent | — | — | — | — | — | — | — | — | — | — | 
                                                1,326,734,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                228,856,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Non-controlling interests | — | — | — | — | — | — | — | — | — | — | 
                                                238,444,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                271,260,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Equity | 
                                                145,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                716,707,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,352,066,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,775,304,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                188,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                238,444,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                16,949,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,326,734,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                315,746,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                146,239,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,565,178,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                42,404,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                145,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                2,278,087,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                271,260,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,873,598,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                188,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                5,305,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                228,856,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                145,751,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                315,746,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,913,063,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                903,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                495,951,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,844,765,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                621,651,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                146,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                10,772,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,417,112,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                133,569,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                315,746,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Liabilities [abstract] | ||||||||||||||||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||||||||||||||||
| Deferred tax liabilities | — | — | — | — | — | — | — | — | — | — | 
                                                261,726,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                346,989,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other non-current financial liabilities | — | — | — | — | — | — | — | — | — | — | 
                                                9,092,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                164,347,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Non-current liabilities | — | — | — | — | — | — | — | — | — | — | 
                                                3,467,115,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                6,300,131,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Current liabilities [abstract] | ||||||||||||||||||||||||||||||||
| Current provisions [abstract] | ||||||||||||||||||||||||||||||||
| Other current provisions | — | — | — | — | — | — | — | — | — | — | 
                                                332,406,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                105,188,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other current financial liabilities | — | — | — | — | — | — | — | — | — | — | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,535,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Current liabilities | — | — | — | — | — | — | — | — | — | — | 
                                                917,626,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                799,328,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Equity and liabilities | — | — | — | — | — | — | — | — | — | — | 
                                                6,887,153,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                7,716,787,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |