Statement Of Comprehensive Income [Abstract]
| Concept | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 2022-01-01 to 2022-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||
| Profit (loss) | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                175  397
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                175  397
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                249  068
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                249   068
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
| Other comprehensive income [abstract] | ||||||||||
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||||
| Exchange differences on translation [abstract] | ||||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations | — | — | 
                                                12 289
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | 
                                                21 451
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | 
| Cash flow hedges [abstract] | ||||||||||
| Gains (losses) on cash flow hedges, before tax | — | — | 
                                                13 112
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | 
                                                25  515
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | 
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract] | ||||||||||
| Income tax relating to cash flow hedges included in other comprehensive income | — | — | 
                                                2 701
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | 
                                                5 256
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | 
| Other comprehensive income | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                22 700
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                22  700
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                41  710
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                41  710
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
| Comprehensive income | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                152  697
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                175  397
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                22 700
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                41  710
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                290  778
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                249  068
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
                                                –
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | 
| Comprehensive income attributable to [abstract] | ||||||||||
| Comprehensive income, attributable to owners of parent | — | — | 
                                                152 697
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — | — | — | 
                                                290  778
                                                
                                                    
                                                        SEK
                                                    
                                                
                                             | — | — |