Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||
| Equity |
4 872
SEK
|
2 797
SEK
|
14 777
SEK
|
— |
22 447
SEK
|
— |
1,000,000
SEK
|
— | — | — | — |
3 747
SEK
|
11 446
SEK
|
1,000,000
SEK
|
— |
1 007
SEK
|
— | — | — |
16 201
SEK
|
2 606
SEK
|
11 446
SEK
|
17 363
SEK
|
3 310
SEK
|
1,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||
| Profit (loss) | — | — | — | — | — | — | — | — |
1 726
SEK
|
1 726
SEK
|
451,000,000
SEK
|
— | — | — |
451,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — |
1 869
SEK
|
— |
1 613
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — | — | — |
1 790
SEK
|
— |
–
SEK
|
— |
–
SEK
|
3 595
SEK
|
1 805
SEK
|
1 162
SEK
|
— | — | — |
437,000,000
SEK
|
— |
1 599
SEK
|
–
SEK
|
–
SEK
|
— | — | — | — | — | — |