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) | 
                                                1,670,785,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                496,858,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Adjustments for depreciation expense | 
                                                8,547,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                10,348,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Adjustments for gains (losses) on fair value adjustment, investment property | 
                                                483,177,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,172,738,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Adjustments for gain (loss) on disposal of investments in subsidiaries, joint ventures and associates | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                5,108,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Cash flows from (used in) investing activities [abstract] | ||
| Cash flows from (used in) decrease (increase) in restricted cash and cash equivalents | 
                                                15,639,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                7,782,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Cash receipts from repayment of advances and loans made to related parties | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                12,300,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Purchase of investment property | 
                                                44,630,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                55,114,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Proceeds from sales of investment property | 
                                                41,561,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                175,032,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Proceeds from disposal of non-current assets or disposal groups classified as held for sale and discontinued operations | 
                                                13,494,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Cash flows from (used in) financing activities [abstract] | ||
| Proceeds from non-current borrowings | 
                                                776,778,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                1,051,096,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Repayments of non-current borrowings | 
                                                12,530,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                268,532,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Repayments of current borrowings | 
                                                24,455,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                24,500,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Proceeds from issue of bonds, notes and debentures | 
                                                130,745,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                196,464,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
| Repayments of bonds, notes and debentures | 
                                                620,215,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             | 
                                                970,454,000
                                                
                                                    
                                                        EUR
                                                    
                                                
                                             |