Subclassifications Of Assets, Liabilities And Equities [Abstract]
| Concept | As at 2024-12-31 | As at 2023-12-31 | As at 2022-12-31 | 
|---|---|---|---|
| Subclassifications of assets, liabilities and equities [abstract] | |||
| Property, plant and equipment [abstract] | |||
| Property, plant and equipment | 
                                                6 562
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                6 697
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Intangible assets and goodwill [abstract] | |||
| Intangible assets other than goodwill [abstract] | |||
| Intangible assets other than goodwill | 
                                                19 253
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                18 574
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Goodwill | 
                                                2 884
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                2 983
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Investment property [abstract] | |||
| Investment property | 
                                                108,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                2 464
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Trade and other non-current receivables [abstract] | |||
| Trade and other non-current receivables | 
                                                87,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Trade and other current receivables [abstract] | |||
| Current receivables due from related parties | 
                                                15,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                118,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Categories of current financial assets [abstract] | |||
| Current financial assets at fair value through profit or loss [abstract] | |||
| Current financial assets at fair value through profit or loss, mandatorily measured at fair value | 
                                                21 503
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                19 121
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Current loans and receivables | 
                                                420,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                580,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Classes of current inventories [abstract] | |||
| Current inventories | 
                                                41,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                39,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Classes of current inventories, alternative [abstract] | |||
| Cash and cash equivalents [abstract] | |||
| Cash and cash equivalents | 
                                                2 376
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                1 829
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                1 345
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Borrowings [abstract] | |||
| Non-current portion of non-current borrowings | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                147,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Non-current portion of non-current borrowings, by type [abstract] | |||
| Trade and other current payables [abstract] | |||
| Current payables to related parties | 
                                                17 091
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                17 110
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Categories of current financial liabilities [abstract] | |||
| Current financial liabilities at amortised cost | 
                                                7 281
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                8 759
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Issued capital [abstract] | |||
| Issued capital | 
                                                4 782
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                4 782
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Retained earnings [abstract] | |||
| Retained earnings | 
                                                15 997
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                16 889
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Net assets (liabilities) [abstract] | |||
| Assets | 
                                                59 780
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                59 033
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Liabilities | 
                                                34 162
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                35 242
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Net current assets (liabilities) [abstract] | |||
| Current assets | 
                                                29 970
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                27 118
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Current liabilities | 
                                                32 240
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                33 096
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | — | 
| Assets less current liabilities [abstract] |