Statement Of Financial Position [Abstract]
| Concept | 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 2021-12-31 | As at 2021-12-31 | As at 2021-12-31 | As at 2021-12-31 | As at 2021-12-31 | As at 2021-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||
| Property, plant and equipment | — | — | — | 
                                                34,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                9,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
| Investment property | — | — | — | 
                                                67 567
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                56 134
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
| Goodwill | — | — | — | 
                                                41,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements | — | — | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                13 545
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
| Deferred tax assets | — | — | — | 
                                                1,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                2,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
| Cash and cash equivalents | — | — | — | 
                                                915,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                351,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | 
                                                355,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | 
| Assets | — | — | — | 
                                                85 044
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                89 834
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
| Equity and liabilities [abstract] | ||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||
| Issued capital | — | — | — | 
                                                23 380
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                23 380
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
| Retained earnings | — | — | — | 
                                                8 664
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                8 919
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
| Share premium | — | — | — | 
                                                13 668
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                13 668
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
| Equity | 
                                                13 668
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                23 380
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                8 664
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                46 584
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                872,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                872,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                46 839
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                13 668
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                8 919
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                23 380
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                65 583
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                7 854
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                872,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                13 668
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                43 189
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Liabilities [abstract] | ||||||||||||||||||
| Deferred tax liabilities | — | — | — | 
                                                20,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
| Liabilities | — | — | — | 
                                                38 460
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                42 995
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
| Equity and liabilities | — | — | — | 
                                                85 044
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | 
                                                89 834
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — |