Statement Of Financial Position [Abstract]
| Concept |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||
| Assets [abstract] | |||||||||||||||
| Non-current assets [abstract] | |||||||||||||||
| Property, plant and equipment |
2 7, 5
SEK
|
— | — | — | — |
315,000,000.0
SEK
|
— | — | — | — | — | — | — | — | — |
| Intangible assets other than goodwill |
1 69 ,1
SEK
|
— | — | — | — |
1 62, 8
SEK
|
— | — | — | — | — | — | — | — | — |
| Deferred tax assets |
3 7, 2
SEK
|
— | — | — | — |
28, 8
SEK
|
— | — | — | — | — | — | — | — | — |
| Current assets [abstract] | |||||||||||||||
| Cash and cash equivalents |
5 7, 5
SEK
|
— | — | — | — |
1 5 5,1
SEK
|
— | — | — | — | — | — |
24 0, 2
SEK
|
— | — |
| Assets |
3 474,0
SEK
|
— | — | — | — |
3 195,3
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||
| Equity [abstract] | |||||||||||||||
| Issued capital |
50, 3
SEK
|
— | — | — | — |
5 0, 3
SEK
|
— | — | — | — | — | — | — | — | — |
| Retained earnings |
5 3 7, 7
SEK
|
— | — | — | — |
60 4 ,7
SEK
|
— | — | — | — | — | — | — | — | — |
| Other reserves |
0 ,1
SEK
|
— | — | — | — |
0.0
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity |
5 4 8 ,1
SEK
|
4,953,000,000.0
SEK
|
0 ,1
SEK
|
25,000,000.0
SEK
|
50, 3
SEK
|
58 8 ,0
SEK
|
50, 3
SEK
|
5 3 5 ,1
SEK
|
0.0
SEK
|
25,000,000.0
SEK
|
4 7 7, 4
SEK
|
0, 5
SEK
|
528 ,0
SEK
|
–
SEK
|
5 0 ,1
SEK
|
| Liabilities [abstract] | |||||||||||||||
| Liabilities |
2 925,9
SEK
|
— | — | — | — |
2 607,3
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities |
3 474,0
SEK
|
— | — | — | — |
3 195,3
SEK
|
— | — | — | — | — | — | — | — | — |