Statement Of Changes In Equity [Abstract]
| Concept |
2021-01-01 to 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 |
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 |
As at 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 | — |
1 248
SEK
|
6,000,000
SEK
|
— |
1 299
SEK
|
0
SEK
|
45,000,000
SEK
|
— | — | — |
1 104
SEK
|
0
SEK
|
45,000,000
SEK
|
— |
3,000,000
SEK
|
— |
1 152
SEK
|
— |
0
SEK
|
8,000,000
SEK
|
1 090
SEK
|
1 037
SEK
|
45,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||
| Profit (loss) |
0
SEK
|
— | — | — | — | — | — |
212,000,000
SEK
|
212,000,000
SEK
|
67,000,000
SEK
|
— | — | — |
67,000,000
SEK
|
— | — | — |
0
SEK
|
— | — | — | — | — |
| Other comprehensive income |
0
SEK
|
— | — |
3,000,000
SEK
|
— | — | — |
3,000,000
SEK
|
-
SEK
|
5,000,000
SEK
|
— | — | — |
-
SEK
|
— |
5,000,000
SEK
|
— |
0
SEK
|
— | — | — | — | — |
| Comprehensive income |
0
SEK
|
— | — |
3,000,000
SEK
|
— | — | — |
215,000,000
SEK
|
212,000,000
SEK
|
62,000,000
SEK
|
— | — | — |
67,000,000
SEK
|
— |
5,000,000
SEK
|
— |
0
SEK
|
— | — | — | — | — |
| Dividends recognised as distributions to owners | — | — | — | — | — | — | — |
68,000,000
SEK
|
68,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |