Disclosure Of Intangible Assets [Text Block]
| Concept | 
                                    
                                        As at 2024-12-31  | 
                            
                                
                                    
                                        2024-01-01 to 2024-12-31  | 
                            
                                
                                    
                                        As at 2023-12-31  | 
                            
                        
|---|---|---|---|
| Disclosure of intangible assets [text block] | — | 
                                        
                                             
                                                Accounting policies  
                                                
                                             
                                        
                                     | 
                                
                                    — | 
| Disclosure of reconciliation of changes in intangible assets and goodwill [text block] | — | — | — | 
| Disclosure of reconciliation of changes in intangible assets and goodwill [abstract] | |||
| Disclosure of reconciliation of changes in intangible assets and goodwill [line items] | |||
| Reconciliation of changes in intangible assets and goodwill [abstract] | |||
| Intangible assets and goodwill | 
                                        
                                             
                                                1,762,000,000
                                                
                                                    
                                                        DKK
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
                                        
                                             
                                                1,377,000,000
                                                
                                                    
                                                        DKK
                                                    
                                                
                                             
                                        
                                     |