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 |
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 |
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 |
643,000,000
SEK
|
119,000,000
SEK
|
1 435
SEK
|
— |
676,000,000
SEK
|
— |
3,000,000
SEK
|
— | — | — |
701,000,000
SEK
|
— |
1 390
SEK
|
3,000,000
SEK
|
— |
11,000,000
SEK
|
— | — | — |
70 3
SEK
|
39,000,000
SEK
|
1 329
SEK
|
698,000,000
SEK
|
595,000,000
SEK
|
3,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||
| Profit (loss) | — | — | — | — | — | — | — | — |
57,000,000
SEK
|
57,000,000
SEK
|
— |
108,000,000
SEK
|
— | — |
108,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — |
13 0
SEK
|
— |
−
SEK
|
— |
−
SEK
|
1 30
SEK
|
— | — |
49,000,000
SEK
|
— | — | — | — |
49,000,000
SEK
|
−
SEK
|
−
SEK
|
— | — | — | — | — | — |
| Comprehensive income | — | — | — |
130,000,000
SEK
|
— |
−
SEK
|
— |
−
SEK
|
7 3
SEK
|
5 7
SEK
|
— |
5 8
SEK
|
— | — |
108,000,000
SEK
|
— |
49,000,000
SEK
|
−
SEK
|
−
SEK
|
— | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — | — | — |
−
SEK
|
— | — | — | — |
0
SEK
|
0
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |