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 |
As at 2022-12-31 |
2022-01-01 to 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 |
2021-01-01 to 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 |
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 |
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 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||
| Equity |
501,000,000
SEK
|
— | — | — | — | — |
14,000,000
SEK
|
35,000,000
SEK
|
6,000,000
SEK
|
425,000,000
SEK
|
21,000,000
SEK
|
466,000,000
SEK
|
— | — | — |
560,000,000
SEK
|
4,000,000
SEK
|
— | — |
613,000,000
SEK
|
— |
591,000,000
SEK
|
6,000,000
SEK
|
22,000,000
SEK
|
— |
21,000,000
SEK
|
— | — |
5 38
SEK
|
30,000,000
SEK
|
531,000,000
SEK
|
1,000,000
SEK
|
8,000,000
SEK
|
-
SEK
|
561,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||
| Profit (loss) | — |
-
SEK
|
-
SEK
|
325,000,000
SEK
|
305,000,000
SEK
|
20,000,000
SEK
|
— | — | — | — | — | — |
305,000,000
SEK
|
-
SEK
|
20,000,000
SEK
|
— | — |
-
SEK
|
293,000,000
SEK
|
— |
-
SEK
|
— | — | — |
-
SEK
|
— |
313,000,000
SEK
|
293,000,000
SEK
|
— | — | — | — | — | — | — |
| Comprehensive income | — |
-
SEK
|
10,000,000
SEK
|
336,000,000
SEK
|
305,000,000
SEK
|
21,000,000
SEK
|
— | — | — | — | — | — |
315,000,000
SEK
|
-
SEK
|
21,000,000
SEK
|
— | — |
12,000,000
SEK
|
295,000,000
SEK
|
— |
-
SEK
|
— | — | — |
-
SEK
|
— |
316,000,000
SEK
|
283,000,000
SEK
|
— | — | — | — | — | — | — |
| Issue of equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
-
SEK
|
— | — |
-
SEK
|
-
SEK
|
— |
-
SEK
|
— | — | — |
20,000,000
SEK
|
— |
-
SEK
|
20,000,000
SEK
|
— | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — |
-
SEK
|
-
SEK
|
448,000,000
SEK
|
440,000,000
SEK
|
8,000,000
SEK
|
— | — | — | — | — | — |
440,000,000
SEK
|
-
SEK
|
29,000,000
SEK
|
— | — |
-
SEK
|
241,000,000
SEK
|
— |
-
SEK
|
— | — | — |
-
SEK
|
— |
270,000,000
SEK
|
241,000,000
SEK
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
-
SEK
|
— | — |
-
SEK
|
6,000,000
SEK
|
— |
6,000,000
SEK
|
— | — | — |
-
SEK
|
— |
6,000,000
SEK
|
-
SEK
|
— | — | — | — | — | — | — |