Disclosure Of Impairment Of Assets [Text Block]
| Concept | 
                                    
                                        As at 2024-12-31  | 
                            
                                
                                    
                                        2024-01-01 to 2024-12-31  | 
                            
                                
                                    
                                        As at 2023-12-31  | 
                            
                        
|---|---|---|---|
| Disclosure of impairment of assets [text block] | — | 
                                        
                                             | 
                                
                                    — | 
| Disclosure of information for cash-generating units [text block] | — | — | — | 
| Disclosure of information for cash-generating units [abstract] | |||
| Disclosure of information for cash-generating units [line items] | |||
| Goodwill | 
                                        
                                             
                                                3 193,0
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    — | 
                                        
                                             
                                                3 085,3
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             
                                        
                                     |