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 |
42,000,000
SEK
|
— | — | — | — |
43,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Investment property |
3 994,1
SEK
|
— | — | — | — |
3 317,5
SEK
|
— | — | — | — | — | — | — | — | — |
| Intangible assets other than goodwill |
1,000,000
SEK
|
— | — | — | — |
1,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
1,902,000,000
SEK
|
— | — | — | — |
4,480,000,000
SEK
|
— | — | — | — | — |
404,000,000
SEK
|
— | — | — |
| Assets |
4 223,1
SEK
|
— | — | — | — |
3 780,4
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||
| Equity [abstract] | |||||||||||||||
| Issued capital |
5,000,000
SEK
|
— | — | — | — |
5,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Retained earnings |
4,835,000,000
SEK
|
— | — | — | — |
2,738,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity |
2 275,9
SEK
|
4,835,000,000
SEK
|
1 786,9
SEK
|
50,000,000
SEK
|
5,000,000
SEK
|
2 057,9
SEK
|
5,000,000
SEK
|
2,738,000,000
SEK
|
33,000,000
SEK
|
1 786,9
SEK
|
2,020,000,000
SEK
|
9,555,000,000
SEK
|
37,000,000
SEK
|
7,496,000,000
SEK
|
1,000,000
SEK
|
| Liabilities [abstract] | |||||||||||||||
| Deferred tax liabilities |
1,391,000,000
SEK
|
— | — | — | — |
865,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Liabilities |
1 947,2
SEK
|
— | — | — | — |
1 722,6
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities |
4 223,1
SEK
|
— | — | — | — |
3 780,4
SEK
|
— | — | — | — | — | — | — | — | — |