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 |
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 |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||
| Equity |
37 488
SEK
|
— | — | — | — |
5 339
SEK
|
6,000,000
SEK
|
29 297
SEK
|
2 620
SEK
|
226,000,000
SEK
|
— |
28 133
SEK
|
2 011
SEK
|
226,000,000
SEK
|
— |
32 998
SEK
|
8,000,000
SEK
|
2 620
SEK
|
— | — |
25 717
SEK
|
8,000,000
SEK
|
226,000,000
SEK
|
2 620
SEK
|
382,000,000
SEK
|
28 953
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||
| Profit (loss) | — | — |
5 257
SEK
|
5 260
SEK
|
3,000,000
SEK
|
— | — | — | — | — |
1,000,000
SEK
|
— | — | — | — | — | — | — |
3 716
SEK
|
3 717
SEK
|
— | — | — | — | — | — |
| Other comprehensive income | — |
3 328
SEK
|
3 441
SEK
|
112,000,000
SEK
|
1,000,000
SEK
|
— | — | — | — | — |
1,000,000
SEK
|
— | — | — |
1 629
SEK
|
— | — | — |
1 684
SEK
|
54,000,000
SEK
|
— | — | — | — | — | — |
| Comprehensive income | — | — |
8 698
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
5 400
SEK
|
— | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — | — |
352,000,000
SEK
|
352,000,000
SEK
|
–
SEK
|
— | — | — | — | — |
–
SEK
|
— | — | — | — | — | — | — |
–
SEK
|
–
SEK
|
— | — | — | — | — | — |