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 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 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 |
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 | — | — |
205,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
262,000,000
SEK
|
— | — | — | — | — | — | — |
| Deferred tax assets | — | — |
160,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
97,000,000
SEK
|
— | — | — | — | — | — | — |
| Assets | — | — |
30 372
SEK
|
— | — | — | — | — | — | — | — | — | — |
31 864
SEK
|
— | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||
| Issued capital | — | — |
30,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
30,000,000
SEK
|
— | — | — | — | — | — | — |
| Retained earnings | — | — |
1 924
SEK
|
— | — | — | — | — | — | — | — | — | — |
2 128
SEK
|
— | — | — | — | — | — | — |
| Other reserves | — | — |
394,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
381,000,000
SEK
|
— | — | — | — | — | — | — |
| Equity |
1 924
SEK
|
2,275,000,000
SEK
|
4 941
SEK
|
473,000,000
SEK
|
1,106,000,000
SEK
|
79,000,000
SEK
|
30,000,000
SEK
|
2 128
SEK
|
443,000,000
SEK
|
2 275
SEK
|
1,106,000,000
SEK
|
30,000,000
SEK
|
62,000,000
SEK
|
5 158
SEK
|
4 898
SEK
|
30,000,000
SEK
|
690,000,000
SEK
|
181,000,000
SEK
|
439,000,000
SEK
|
2 275
SEK
|
2 161
SEK
|
| Liabilities [abstract] | |||||||||||||||||||||
| Non-current liabilities [abstract] | |||||||||||||||||||||
| Deferred tax liabilities | — | — |
127,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
141,000,000
SEK
|
— | — | — | — | — | — | — |
| Liabilities | — | — |
25 431
SEK
|
— | — | — | — | — | — | — | — | — | — |
26 706
SEK
|
— | — | — | — | — | — | — |
| Equity and liabilities | — | — |
30 372
SEK
|
— | — | — | — | — | — | — | — | — | — |
31 864
SEK
|
— | — | — | — | — | — | — |