Statement Of Financial Position [Abstract]
| Concept |
As at 2022-12-31 |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||
| Assets [abstract] | |||||||||||||||
| Property, plant and equipment |
139,000,000.0
SEK
|
— | — | — | — |
275,000,000.0
SEK
|
— | — | — | — | — | — | — | — | — |
| Intangible assets other than goodwill |
1,687,000,000.0
SEK
|
— | — | — | — |
1,691,000,000.0
SEK
|
— | — | — | — | — | — | — | — | — |
| Deferred tax assets |
602,000,000.0
SEK
|
— | — | — | — |
372,000,000.0
SEK
|
— | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
9,006,000,000.0
SEK
|
— | — | — | — |
575,000,000.0
SEK
|
— | — | — | — |
1,551,000,000.0
SEK
|
— | — | — | — |
| Assets |
4 204,9
SEK
|
— | — | — | — |
3 474,0
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||
| Equity [abstract] | |||||||||||||||
| Issued capital |
534,000,000.0
SEK
|
— | — | — | — |
503,000,000.0
SEK
|
— | — | — | — | — | — | — | — | — |
| Other reserves |
39,000,000.0
SEK
|
— | — | — | — |
1,000,000.0
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity |
4,705,000,000.0
SEK
|
25,000,000.0
SEK
|
4,185,000,000.0
SEK
|
534,000,000.0
SEK
|
39,000,000.0
SEK
|
5,481,000,000.0
SEK
|
4,953,000,000.0
SEK
|
1,000,000.0
SEK
|
25,000,000.0
SEK
|
503,000,000.0
SEK
|
5,880,000,000.0
SEK
|
503,000,000.0
SEK
|
5,351,000,000.0
SEK
|
0.0
SEK
|
25,000,000.0
SEK
|
| Liabilities [abstract] | |||||||||||||||
| Liabilities |
3 734,4
SEK
|
— | — | — | — |
2 925,9
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities |
4 204,9
SEK
|
— | — | — | — |
3 474,0
SEK
|
— | — | — | — | — | — | — | — | — |