Statement Of Changes In Equity [Abstract]
| Concept |
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 |
As at 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 |
As at 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 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 |
21 248
SEK
|
— |
3 960
SEK
|
— |
-
SEK
|
25 541
SEK
|
333,000,000
SEK
|
— | — |
18 380
SEK
|
4,000,000
SEK
|
3 960
SEK
|
22 668
SEK
|
333,000,000
SEK
|
— | — |
22 784
SEK
|
3 960
SEK
|
18 506
SEK
|
14,000,000
SEK
|
333,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||
| Profit (loss) | — | — | — | — | — | — | — |
3 757
SEK
|
867,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — |
4,000,000
SEK
|
— |
4,000,000
SEK
|
— | — | — |
4,000,000
SEK
|
10,000,000
SEK
|
— | — | — | — | — |
10,000,000
SEK
|
10,000,000
SEK
|
— | — | — | — | — |