Statement Of Changes In Equity [Abstract]
| Concept |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||
| Equity |
5,062,000,000
SEK
|
— | — | — | — |
61,000,000
SEK
|
9,396,000,000
SEK
|
113,000,000
SEK
|
1 428,4
SEK
|
— |
7,458,000,000
SEK
|
13,000,000
SEK
|
12,628,000,000
SEK
|
— |
5,270,000,000
SEK
|
— |
87,000,000
SEK
|
— | — | — |
6,412,000,000
SEK
|
1 262,8
SEK
|
87,000,000
SEK
|
4,000,000
SEK
|
6,307,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||
| Profit (loss) | — | — | — |
1,938,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,045,000,000
SEK
|
— | — | — | — | — | — |
| Other comprehensive income | — | — | — |
0
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
-
SEK
|
— | — | — | — | — | — |
| Comprehensive income | — |
–
SEK
|
–
SEK
|
1,938,000,000
SEK
|
1,938,000,000
SEK
|
— | — | — | — |
–
SEK
|
— | — | — |
–
SEK
|
— |
–
SEK
|
— |
–
SEK
|
1,045,000,000
SEK
|
1,045,000,000
SEK
|
— | — | — | — | — |
| Issue of equity | — |
26,000,000
SEK
|
–
SEK
|
1,808,000,000
SEK
|
–
SEK
|
— | — | — | — |
1,781,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
–
SEK
|
48,000,000
SEK
|
48,000,000
SEK
|
–
SEK
|
— | — | — | — |
–
SEK
|
— | — | — |
9,000,000
SEK
|
— |
–
SEK
|
— |
–
SEK
|
9,000,000
SEK
|
–
SEK
|
— | — | — | — | — |