Statement Of Cash Flows [Abstract]
| Concept | 2024-01-01 to 2024-12-31 | 2023-01-01 to 2023-12-31 | 
|---|---|---|
| Statement of cash flows [abstract] | ||
| Cash flows from (used in) operating activities [abstract] | ||
| Adjustments for decrease (increase) in trade and other receivables | 
                                                33 011
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                42 713
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
| Adjustments for increase (decrease) in trade and other payables | 
                                                30 984
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                8 136
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
| Cash flows from (used in) financing activities [abstract] | ||
| Cash flows from (used in) increase (decrease) in current borrowings | 
                                                8 009
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                27 516
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             |