Statement Of Financial Position [Abstract]
| Concept |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||
| Assets [abstract] | ||||||||||||
| Right-of-use assets | — | — | — |
139,000,000
SEK
|
156,000,000
SEK
|
— | — | — | — | — | — | — |
| Goodwill | — | — | — |
610,000,000
SEK
|
610,000,000
SEK
|
— | — | — | — | — | — | — |
| Deferred tax assets | — | — | — |
43,000,000
SEK
|
1,000,000
SEK
|
— | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — |
514,000,000
SEK
|
435,000,000
SEK
|
— | — | — |
373,000,000
SEK
|
— | — | — |
| Assets | — | — | — |
2 652
SEK
|
2 302
SEK
|
— | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||
| Equity [abstract] | ||||||||||||
| Issued capital | — | — | — |
1,000,000
SEK
|
1,000,000
SEK
|
— | — | — | — | — | — | — |
| Retained earnings | — | — | — |
1 347
SEK
|
859,000,000
SEK
|
— | — | — | — | — | — | — |
| Equity attributable to owners of parent | — | — | — |
1 772
SEK
|
1 281
SEK
|
— | — | — | — | — | — | — |
| Equity |
1,000,000
SEK
|
1 347
SEK
|
424,000,000
SEK
|
1 772
SEK
|
1 281
SEK
|
859,000,000
SEK
|
1,000,000
SEK
|
421,000,000
SEK
|
982,000,000
SEK
|
561,000,000
SEK
|
420,000,000
SEK
|
1,000,000
SEK
|
| Liabilities [abstract] | ||||||||||||
| Deferred tax liabilities | — | — | — |
33,000,000
SEK
|
37,000,000
SEK
|
— | — | — | — | — | — | — |
| Liabilities | — | — | — |
881,000,000
SEK
|
1 021
SEK
|
— | — | — | — | — | — | — |
| Equity and liabilities | — | — | — |
2 652
SEK
|
2 302
SEK
|
— | — | — | — | — | — | — |