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 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||
| Assets [abstract] | ||||||||||||
| Property, plant and equipment |
238,000,000
SEK
|
— | — | — |
306,000,000
SEK
|
— | — | — | — | — | — | — |
| Right-of-use assets |
524,000,000
SEK
|
— | — | — |
515,000,000
SEK
|
— | — | — | — | — | — | — |
| Intangible assets other than goodwill |
5,726,000,000
SEK
|
— | — | — |
2,769,000,000
SEK
|
— | — | — | — | — | — | — |
| Deferred tax assets |
511,000,000
SEK
|
— | — | — |
516,000,000
SEK
|
— | — | — | — | — | — | — |
| Cash and cash equivalents |
1,973,000,000
SEK
|
— | — | — |
1,727,000,000
SEK
|
— | — | — | — |
486,000,000
SEK
|
— | — |
| Assets |
1 146,3
SEK
|
— | — | — |
7,782,000,000
SEK
|
— | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||
| Equity [abstract] | ||||||||||||
| Issued capital |
5,000,000
SEK
|
— | — | — |
1,000,000
SEK
|
— | — | — | — | — | — | — |
| Retained earnings |
1,384,000,000
SEK
|
— | — | — |
347,000,000
SEK
|
— | — | — | — | — | — | — |
| Equity |
1,395,000,000
SEK
|
1,384,000,000
SEK
|
6,000,000
SEK
|
5,000,000
SEK
|
293,000,000
SEK
|
1,000,000
SEK
|
347,000,000
SEK
|
54,000,000
SEK
|
961,000,000
SEK
|
974,000,000
SEK
|
14,000,000
SEK
|
1,000,000
SEK
|
| Liabilities [abstract] | ||||||||||||
| Liabilities |
1 006,8
SEK
|
— | — | — |
7,489,000,000
SEK
|
— | — | — | — | — | — | — |
| Equity and liabilities |
1 146,3
SEK
|
— | — | — |
7,782,000,000
SEK
|
— | — | — | — | — | — | — |