Statement Of Changes In Equity [Abstract]
| Concept |
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 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2020-12-31 |
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 |
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 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||
| Equity | — |
8 656
SEK
|
— |
11 068
SEK
|
11 068
SEK
|
2 400
SEK
|
12,000,000
SEK
|
— | — |
7 201
SEK
|
— |
74,000,000
SEK
|
9 613
SEK
|
12,000,000
SEK
|
— |
2 400
SEK
|
9 687
SEK
|
— | — |
8 487
SEK
|
69,000,000
SEK
|
2 400
SEK
|
8 556
SEK
|
6 075
SEK
|
12,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||
| Comprehensive income |
3,000,000
SEK
|
— |
1 706
SEK
|
— | — | — | — |
1 709
SEK
|
1 706
SEK
|
— |
1 374
SEK
|
— | — | — |
1 365
SEK
|
— | — |
9,000,000
SEK
|
1 365
SEK
|
— | — | — | — | — | — |
| Dividends recognised as distributions to owners |
77,000,000
SEK
|
— |
251,000,000
SEK
|
— | — | — | — |
328,000,000
SEK
|
251,000,000
SEK
|
— |
243,000,000
SEK
|
— | — | — |
240,000,000
SEK
|
— | — |
4,000,000
SEK
|
240,000,000
SEK
|
— | — | — | — | — | — |
| Increase (decrease) in equity |
77,000,000
SEK
|
— |
251,000,000
SEK
|
— | — | — | — |
328,000,000
SEK
|
251,000,000
SEK
|
— |
243,000,000
SEK
|
— | — | — |
240,000,000
SEK
|
— | — |
4,000,000
SEK
|
240,000,000
SEK
|
— | — | — | — | — | — |