Statement Of Cash Flows [Abstract]
| Concept | 2023-01-01 to 2023-12-31 | 2022-01-01 to 2022-12-31 | 
|---|---|---|
| Statement of cash flows [abstract] | ||
| Cash flows from (used in) investing activities [abstract] | ||
| Purchase of investment property | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                3 239
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Cash flows from (used in) decrease (increase) in short-term deposits and investments | 
                                                3 742
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                1 302
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             |