Disclosure Of Analysis Of Other Comprehensive Income By Item [Text Block]
| Concept | 2022-01-01 to 2022-12-31 | 2021-01-01 to 2021-12-31 | 
|---|---|---|
| Disclosure of analysis of other comprehensive income by item [text block] | — | — | 
| Disclosure of analysis of other comprehensive income by item [abstract] | ||
| Disclosure of analysis of other comprehensive income by item [line items] | ||
| Other comprehensive income, net of tax, gains (losses) from investments in equity instruments | 
                                                2,300,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                210,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Other comprehensive income, net of tax, gains (losses) on revaluation of property, plant and equipment, right-of-use assets and intangible assets | 
                                                23,392,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                -
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
| Other comprehensive income, net of tax, gains (losses) on remeasurements of defined benefit plans | 
                                                6,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             | 
                                                154,000
                                                
                                                    
                                                        BGN
                                                    
                                                
                                             |