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 |
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 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 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 |
As at 2022-12-31 |
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 |
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 |
As at 2021-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||
| Equity | — |
6 510,0
SEK
|
— |
2,715,000,000
SEK
|
— | — |
1,674,000,000
SEK
|
— | — |
54,000,000
SEK
|
452,000,000
SEK
|
6 342,6
SEK
|
— |
6 563,5
SEK
|
7 669,8
SEK
|
— | — | — | — |
560,000,000
SEK
|
9,192,000,000
SEK
|
54,000,000
SEK
|
1,251,000,000
SEK
|
7 613,8
SEK
|
6 564,2
SEK
|
— | — | — |
3,947,000,000
SEK
|
4 790,6
SEK
|
5 256,3
SEK
|
5 211,9
SEK
|
444,000,000
SEK
|
229,000,000
SEK
|
37,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||
| Profit (loss) |
1 542,5
SEK
|
— |
1 564,7
SEK
|
— |
222,000,000
SEK
|
1 564,7
SEK
|
— | — | — | — | — | — | — | — | — | — |
457,000,000
SEK
|
341,000,000
SEK
|
117,000,000
SEK
|
— | — | — | — | — | — |
3 4,1
SEK
|
— | — | — | — | — | — | — | — | — |
| Other comprehensive income |
745,000,000
SEK
|
— |
798,000,000
SEK
|
— |
53,000,000
SEK
|
— | — |
798,000,000
SEK
|
— | — | — | — | — | — | — | — |
1,064,000,000
SEK
|
— |
42,000,000
SEK
|
— | — | — | — | — | — |
1,022,000,000
SEK
|
102, 2
SEK
|
— | — | — | — | — | — | — | — |
| Comprehensive income |
1 617,0
SEK
|
— |
1 644,5
SEK
|
— |
2 7,6
SEK
|
1 564,7
SEK
|
— |
798,000,000
SEK
|
-
SEK
|
— | — | — |
-
SEK
|
— | — |
-
SEK
|
1,521,000,000
SEK
|
341,000,000
SEK
|
159,000,000
SEK
|
— | — | — | — | — | — |
1,362,000,000
SEK
|
1,022,000,000
SEK
|
-
SEK
|
— | — | — | — | — | — | — |
| Issue of equity |
814,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
225,000,000
SEK
|
225,000,000
SEK
|
— | — | — | — | — | — | — |
225,000,000
SEK
|
— | — | — | — | — | — | — | — | — |