Disclosure Of Earnings Per Share [Text Block]
| Concept | 
                                    
                                        2023-01-01 to 2023-12-31  | 
                            
                                
                                    
                                        2022-01-01 to 2022-12-31  | 
                            
                        
|---|---|---|
| Disclosure of earnings per share [text block] | 
                                        
                                             | 
                                
                                    — | 
| Earnings per share [text block] | — | — | 
| Earnings per share [abstract] | ||
| Earnings per share [line items] | ||
| Diluted earnings per share [abstract] | ||
| Diluted earnings (loss) per share | 
                                        
                                             
                                                1 ,60
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                1, 3 0
                                                
                                             
                                        
                                     | 
                                
                            
| Adjustments to reconcile profit (loss) to numerator used in calculating earnings per share [abstract] | ||
| Profit (loss), attributable to owners of parent | 
                                        
                                             
                                                84  0 41
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             
                                        
                                     | 
                                
                                    
                                        
                                             
                                                68  224
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             
                                        
                                     | 
                                
                            
| Disclosure of depositary receipts [text block] | — | — | 
| Disclosure of depositary receipts [abstract] | ||
| Disclosure of depositary receipts [line items] |