Corporate Information And Statement Of Ifrs Compliance [Abstract]
| Concept | 
                                    
                                        2021-01-01 to 2021-12-31  | 
                            
                        
|---|---|
| Corporate information and statement of IFRS compliance [abstract] | |
| Name of reporting entity or other means of identification | 
                                        
                                             | 
                                
                            
| Legal form of entity | 
                                        
                                             
                                                АД
                                                
                                             
                                        
                                     | 
                                
                            
| Address of entity's registered office | 
                                        
                                             | 
                                
                            
| Principal place of business | 
                                        
                                             
                                                България
                                                
                                             
                                        
                                     | 
                                
                            
| Description of nature of entity's operations and principal activities | 
                                        
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| Name of ultimate parent of group | 
                                        
                                             |