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 |
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 |
As at 2022-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 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 |
As at 2021-12-31 |
2021-01-01 to 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 |
As at 2020-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||
| Equity |
5,398,000,000
SEK
|
— | — | — | — | — |
195,000,000
SEK
|
17,000,000
SEK
|
3,930,000,000
SEK
|
845,000,000
SEK
|
412,000,000
SEK
|
— | — |
3,839,000,000
SEK
|
18,000,000
SEK
|
412,000,000
SEK
|
— |
5,093,000,000
SEK
|
15,000,000
SEK
|
— |
845,000,000
SEK
|
— | — | — |
3,564,000,000
SEK
|
14,000,000
SEK
|
412,000,000
SEK
|
845,000,000
SEK
|
106,000,000
SEK
|
4,729,000,000
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||
| Profit (loss) | — |
-
SEK
|
-
SEK
|
261,000,000
SEK
|
260,000,000
SEK
|
1,000,000
SEK
|
— | — | — | — | — |
-
SEK
|
1,000,000
SEK
|
— | — | — |
-
SEK
|
— | — |
-
SEK
|
— |
-
SEK
|
276,000,000
SEK
|
275,000,000
SEK
|
— | — | — | — | — | — |
| Other comprehensive income | — | — | — |
213,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
88,000,000
SEK
|
— | — | — | — | — | — | — |
| Comprehensive income | — | — | — |
474,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
364,000,000
SEK
|
— | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — | — |
169,000,000
SEK
|
169,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |