Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
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 |
2020-07-08 to 2020-12-31 |
2020-07-08 to 2020-12-31 |
2020-07-08 to 2020-12-31 |
2020-07-08 to 2020-12-31 |
2020-07-08 to 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 | — |
2 4 4 , 3
SEK
|
0
SEK
|
8 134 ,9
SEK
|
— |
7 938,9
SEK
|
— |
527,000,000
SEK
|
7 9 3 2 ,1
SEK
|
68,000,000
SEK
|
11, 2
SEK
|
— | — | — |
6 3 ,1
SEK
|
0, 6
SEK
|
2 805,3
SEK
|
2 808,0
SEK
|
0 ,1
SEK
|
888,000,000
SEK
|
— | — | — | — | — |
2 808,6
SEK
|
282,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||
| Profit (loss) |
5,000,000
SEK
|
— | — | — |
3 0 6 , 7
SEK
|
— | — | — | — | — | — | — |
3 07, 2
SEK
|
3 0 6 ,7
SEK
|
— | — | — | — | — | — |
628,000,000
SEK
|
6 3 ,1
SEK
|
4,000,000
SEK
|
6 3 ,1
SEK
|
— | — | — |
| Other comprehensive income |
0
SEK
|
— | — | — |
7 7, 6
SEK
|
— |
7 7, 6
SEK
|
— | — | — | — | — |
7 7, 6
SEK
|
— | — | — | — | — | — | — |
88, 8
SEK
|
— |
0
SEK
|
88 , 8
SEK
|
88 , 8
SEK
|
— | — |
| Comprehensive income |
4,000,000
SEK
|
— | — | — |
2 29, 2
SEK
|
— |
7 7, 6
SEK
|
— | — | — | — | — |
2 29, 6
SEK
|
30 6 ,7
SEK
|
— | — | — | — | — | — |
26 ,0
SEK
|
6 3 ,1
SEK
|
4,000,000
SEK
|
257,000,000
SEK
|
888,000,000
SEK
|
— | — |
| Dividends recognised as distributions to owners |
3,000,000
SEK
|
— | — | — |
7,000,000
SEK
|
— | — | — | — | — | — | — |
1 , 0
SEK
|
7,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — | — | — | — |
35,000,000
SEK
|
— | — | — | — | — | — |
35,000,000
SEK
|
35,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |