Statement Of Financial Position [Abstract]
| Concept |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||
| Property, plant and equipment | — | — | — |
11,000,000
SEK
|
— | — |
14,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Investment property | — | — | — |
7 323,5
SEK
|
— | — |
7 111,4
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Intangible assets other than goodwill | — | — | — |
1,000,000
SEK
|
— | — |
2,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — |
2,120,000,000
SEK
|
— | — |
2,243,000,000
SEK
|
— | — | — | — | — | — |
926,000,000
SEK
|
— | — | — | — |
| Assets | — | — | — |
7 621,5
SEK
|
— | — |
7 524,5
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||
| Issued capital | — | — | — |
2,418,000,000
SEK
|
— | — |
2,270,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — |
1 029,7
SEK
|
— | — |
1 037,8
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent | — | — | — |
3 193,5
SEK
|
— | — |
3 007,0
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity |
2,418,000,000
SEK
|
1 922,0
SEK
|
1 029,7
SEK
|
3 193,5
SEK
|
20 628 625
SEK
|
100 281 607
SEK
|
3 007,0
SEK
|
92 874 199
SEK
|
227 ,0
SEK
|
1 037,7
SEK
|
20 628 625
SEK
|
1 742,2
SEK
|
7,707,000,000
SEK
|
1 847,6
SEK
|
1,608,000,000
SEK
|
66 446 380
SEK
|
9,161,000,000
SEK
|
13 951 313
SEK
|
| Liabilities [abstract] | ||||||||||||||||||
| Deferred tax liabilities | — | — | — |
2,410,000,000
SEK
|
— | — |
2,370,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities | — | — | — |
7 621,5
SEK
|
— | — |
7 524,5
SEK
|
— | — | — | — | — | — | — | — | — | — | — |