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 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||
| Assets [abstract] | ||||||||||||
| Property, plant and equipment |
259,000,000
SEK
|
— | — | — |
259,000,000
SEK
|
— | — | — | — | — | — | — |
| Right-of-use assets |
7,154,000,000
SEK
|
— | — | — |
7,166,000,000
SEK
|
— | — | — | — | — | — | — |
| Investment property |
48 789,6
SEK
|
— | — | — |
45 636,5
SEK
|
— | — | — | — | — | — | — |
| Cash and cash equivalents |
1 182,0
SEK
|
— | — | — |
7,836,000,000
SEK
|
— | — | — | — |
1 706,1
SEK
|
— | — |
| Assets |
51 098,8
SEK
|
— | — | — |
47 397,1
SEK
|
— | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||
| Equity [abstract] | ||||||||||||
| Issued capital |
1 056,4
SEK
|
— | — | — |
1 056,4
SEK
|
— | — | — | — | — | — | — |
| Retained earnings |
29 381,5
SEK
|
— | — | — |
26 932,0
SEK
|
— | — | — | — | — | — | — |
| Equity |
31 066,0
SEK
|
29 381,5
SEK
|
6,281,000,000
SEK
|
1 056,4
SEK
|
28 616,5
SEK
|
1 056,4
SEK
|
26 932,0
SEK
|
6,281,000,000
SEK
|
29 698,2
SEK
|
31 382,7
SEK
|
6,281,000,000
SEK
|
1 056,4
SEK
|
| Liabilities [abstract] | ||||||||||||
| Deferred tax liabilities |
9 162,1
SEK
|
— | — | — |
8 501,5
SEK
|
— | — | — | — | — | — | — |
| Liabilities |
20 032,8
SEK
|
— | — | — |
18 780,6
SEK
|
— | — | — | — | — | — | — |
| Equity and liabilities |
51 098,8
SEK
|
— | — | — |
47 397,1
SEK
|
— | — | — | — | — | — | — |