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 |
As at 2022-12-31 |
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 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 |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||
| Equity |
1,119,000,000
SEK
|
— | — | — |
584,000,000
SEK
|
71,000,000
SEK
|
16,000,000
SEK
|
1,119,000,000
SEK
|
449,000,000
SEK
|
— | — | — |
604,000,000
SEK
|
449,000,000
SEK
|
— |
1,138,000,000
SEK
|
— |
1,138,000,000
SEK
|
— |
15,000,000
SEK
|
71,000,000
SEK
|
— | — | — |
556,000,000
SEK
|
449,000,000
SEK
|
1,088,000,000
SEK
|
71,000,000
SEK
|
12,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||
| Profit (loss) | — |
-
SEK
|
331,000,000
SEK
|
331,000,000
SEK
|
— | — | — | — | — |
331,000,000
SEK
|
-
SEK
|
-
SEK
|
— | — |
329,000,000
SEK
|
— |
-
SEK
|
— |
-
SEK
|
— | — |
-
SEK
|
329,000,000
SEK
|
329,000,000
SEK
|
— | — | — | — | — |
| Other comprehensive income | — |
-
SEK
|
2,000,000
SEK
|
-
SEK
|
— | — | — | — | — |
2,000,000
SEK
|
2,000,000
SEK
|
-
SEK
|
— | — |
2,000,000
SEK
|
— |
2,000,000
SEK
|
— |
-
SEK
|
— | — |
-
SEK
|
2,000,000
SEK
|
-
SEK
|
— | — | — | — | — |
| Comprehensive income | — |
-
SEK
|
333,000,000
SEK
|
331,000,000
SEK
|
— | — | — | — | — |
333,000,000
SEK
|
2,000,000
SEK
|
-
SEK
|
— | — |
332,000,000
SEK
|
— |
2,000,000
SEK
|
— |
-
SEK
|
— | — |
-
SEK
|
332,000,000
SEK
|
329,000,000
SEK
|
— | — | — | — | — |
| Dividends recognised as distributions to owners | — |
-
SEK
|
— |
355,000,000
SEK
|
— | — | — | — | — |
355,000,000
SEK
|
-
SEK
|
-
SEK
|
— | — |
284,000,000
SEK
|
— |
-
SEK
|
— |
-
SEK
|
— | — |
-
SEK
|
— |
284,000,000
SEK
|
— | — | — | — | — |
| Increase (decrease) through other changes, equity | — | — |
-
SEK
|
3,000,000
SEK
|
— | — | — | — | — |
3,000,000
SEK
|
-
SEK
|
-
SEK
|
— | — |
2,000,000
SEK
|
— |
-
SEK
|
— |
-
SEK
|
— | — |
-
SEK
|
— |
2,000,000
SEK
|
— | — | — | — | — |