Statement Of Changes In Equity [Abstract]
| Concept |
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 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||
| Equity |
2,106,000,000
SEK
|
— | — | — |
1,907,000,000
SEK
|
5,000,000
SEK
|
194,000,000
SEK
|
— |
1,384,000,000
SEK
|
1,395,000,000
SEK
|
— | — |
6,000,000
SEK
|
5,000,000
SEK
|
— | — |
347,000,000
SEK
|
1,000,000
SEK
|
54,000,000
SEK
|
293,000,000
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||
| Profit (loss) | — | — |
486,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
298,000,000
SEK
|
— | — | — | — | — |
| Other comprehensive income | — | — |
188,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
59,000,000
SEK
|
— | — | — | — | — |
| Comprehensive income | — |
-
SEK
|
674,000,000
SEK
|
486,000,000
SEK
|
— | — | — |
188,000,000
SEK
|
— | — |
59,000,000
SEK
|
–
SEK
|
— | — |
358,000,000
SEK
|
298,000,000
SEK
|
— | — | — | — |
| Issue of equity | — | — | — | — | — | — | — | — | — | — |
–
SEK
|
5,000,000
SEK
|
— | — |
5,000,000
SEK
|
–
SEK
|
— | — | — | — |
| Increase through other contributions by owners, equity | — |
-
SEK
|
47,000,000
SEK
|
47,000,000
SEK
|
— | — | — |
-
SEK
|
— | — |
–
SEK
|
–
SEK
|
— | — |
750,000,000
SEK
|
750,000,000
SEK
|
— | — | — | — |