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] | |||||||||||||||
| Property, plant and equipment |
1 006
SEK
|
— | — | — | — |
507,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Deferred tax assets |
105,000,000
SEK
|
— | — | — | — |
65,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
768,000,000
SEK
|
— | — | — | — |
604,000,000
SEK
|
— | — | — | — | — |
519,000,000
SEK
|
— | — | — |
| Assets |
3 973
SEK
|
— | — | — | — |
2 628
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||
| Equity [abstract] | |||||||||||||||
| Issued capital |
1,000,000
SEK
|
— | — | — | — |
1,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Retained earnings |
789,000,000
SEK
|
— | — | — | — |
559,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity |
1 101
SEK
|
789,000,000
SEK
|
620,000,000
SEK
|
309,000,000
SEK
|
1,000,000
SEK
|
806,000,000
SEK
|
1,000,000
SEK
|
559,000,000
SEK
|
369,000,000
SEK
|
615,000,000
SEK
|
399,000,000
SEK
|
890,000,000
SEK
|
122,000,000
SEK
|
612,000,000
SEK
|
1,000,000
SEK
|
| Liabilities [abstract] | |||||||||||||||
| Deferred tax liabilities |
7,000,000
SEK
|
— | — | — | — |
5,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Liabilities |
2 872
SEK
|
— | — | — | — |
1 821
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities |
3 973
SEK
|
— | — | — | — |
2 628
SEK
|
— | — | — | — | — | — | — | — | — |