Disclosure Of Leases [Text Block]
| Concept | 
                                    
                                        As at 2024-12-31  | 
                            
                                
                                    
                                        2024-01-01 to 2024-12-31  | 
                            
                                
                                    
                                        As at 2023-12-31  | 
                            
                        
|---|---|---|---|
| Disclosure of leases [text block] | — | 
                                        
                                             | 
                                
                                    — | 
| Presentation of leases for lessee [abstract] | |||
| Lease liabilities [abstract] | |||
| Current lease liabilities | 
                                        
                                             
                                                85,000,000
                                                
                                                    
                                                        DKK
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
                                        
                                             
                                                87,000,000
                                                
                                                    
                                                        DKK
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Non-current lease liabilities | 
                                        
                                             
                                                362,000,000
                                                
                                                    
                                                        DKK
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
                                        
                                             
                                                211,000,000
                                                
                                                    
                                                        DKK
                                                    
                                                
                                             
                                        
                                     |