Statement Of Changes In Equity [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||
| Equity | — |
29 7, 8
SEK
|
299, 8
SEK
|
— | — | — |
5,000,000
SEK
|
2 , 5
SEK
|
210 , 6
SEK
|
— | — | — |
19 0 , 7
SEK
|
5,000,000
SEK
|
19 , 4
SEK
|
— |
13 8 , 4
SEK
|
13 9 , 5
SEK
|
6,000,000
SEK
|
0 ,5
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||
| Profit (loss) |
1,041,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
486,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Other comprehensive income |
219,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
188,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Comprehensive income |
822,000,000
SEK
|
— | — |
10 4 ,1
SEK
|
21, 9
SEK
|
-
SEK
|
— | — | — |
-
SEK
|
674,000,000
SEK
|
486,000,000
SEK
|
— | — | — |
18 , 8
SEK
|
— | — | — | — |
| Increase through other contributions by owners, equity |
86,000,000
SEK
|
— | — |
86,000,000
SEK
|
-
SEK
|
-
SEK
|
— | — | — |
-
SEK
|
4 ,7
SEK
|
4 ,7
SEK
|
— | — | — |
-
SEK
|
— | — | — | — |