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 |
18,000,000
SEK
|
— | — | — | — |
21,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
697,000,000
SEK
|
— | — | — | — |
0
SEK
|
— | — | — | — | — |
56,000,000
SEK
|
— | — | — |
| Assets |
150 752
SEK
|
— | — | — | — |
129 110
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||
| Equity [abstract] | |||||||||||||||
| Issued capital |
1 088
SEK
|
— | — | — | — |
1 088
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity |
143 079
SEK
|
1 063
SEK
|
1 088
SEK
|
26 594
SEK
|
114 334
SEK
|
120 976
SEK
|
1 088
SEK
|
1 063
SEK
|
110 385
SEK
|
8 440
SEK
|
1 088
SEK
|
112 528
SEK
|
1 063
SEK
|
29 837
SEK
|
80 540
SEK
|
| Liabilities [abstract] | |||||||||||||||
| Deferred tax liabilities |
164,000,000
SEK
|
— | — | — | — |
140,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities |
150 752
SEK
|
— | — | — | — |
129 110
SEK
|
— | — | — | — | — | — | — | — | — |