Statement Of Changes In Equity [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
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 |
As at 2021-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||
| Equity | — |
5,456,000,000
SEK
|
— |
1 266,5
SEK
|
167,000,000
SEK
|
— | — |
154,000,000
SEK
|
— |
1 780,0
SEK
|
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
|
1 262,8
SEK
|
5,270,000,000
SEK
|
87,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||
| Profit (loss) |
3,269,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — |
1,938,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income |
1,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — |
0
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
3,270,000,000
SEK
|
— |
-
SEK
|
— | — |
3,270,000,000
SEK
|
-
SEK
|
— |
-
SEK
|
— | — |
-
SEK
|
-
SEK
|
1,938,000,000
SEK
|
1,938,000,000
SEK
|
— | — | — | — |
-
SEK
|
— | — | — | — | — |
| Issue of equity |
3,819,000,000
SEK
|
— |
-
SEK
|
— | — |
-
SEK
|
41,000,000
SEK
|
— |
3,778,000,000
SEK
|
— | — |
26,000,000
SEK
|
-
SEK
|
1,808,000,000
SEK
|
-
SEK
|
— | — | — | — |
1,781,000,000
SEK
|
— | — | — | — | — |
| Increase (decrease) through other changes, equity |
34,000,000
SEK
|
— |
34,000,000
SEK
|
— | — |
-
SEK
|
-
SEK
|
— |
-
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
72,000,000
SEK
|
— |
72,000,000
SEK
|
— | — |
-
SEK
|
-
SEK
|
— |
-
SEK
|
— | — |
-
SEK
|
48,000,000
SEK
|
48,000,000
SEK
|
-
SEK
|
— | — | — | — |
-
SEK
|
— | — | — | — | — |