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 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 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 |
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 |
As at 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 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||
| Equity | — |
2 206
SEK
|
— |
337,000,000
SEK
|
— | — |
318,000,000
SEK
|
— | — |
4,000,000
SEK
|
1,000,000
SEK
|
1 887
SEK
|
46,000,000
SEK
|
— |
1 499
SEK
|
— |
1 616
SEK
|
— | — | — | — | — |
−
SEK
|
129,000,000
SEK
|
4,000,000
SEK
|
1,000,000
SEK
|
1 616
SEK
|
1 567
SEK
|
— |
8 5
SEK
|
— | — |
64 3
SEK
|
1 435
SEK
|
6 76
SEK
|
121,000,000
SEK
|
676,000,000
SEK
|
−
SEK
|
1,000,000
SEK
|
3,000,000
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
20 0
SEK
|
— |
20 6
SEK
|
— |
6,000,000
SEK
|
2 06
SEK
|
— |
−
SEK
|
−
SEK
|
— | — | — | — |
−
SEK
|
— |
−
SEK
|
— |
−
SEK
|
7 72
SEK
|
7 72
SEK
|
−
SEK
|
−
SEK
|
— | — | — | — | — | — |
7 72
SEK
|
— |
−
SEK
|
−
SEK
|
— | — | — | — | — | — | — | — |
| Other comprehensive income |
127,000,000
SEK
|
— |
131,000,000
SEK
|
— |
4,000,000
SEK
|
−
SEK
|
— |
0
SEK
|
−
SEK
|
— | — | — | — |
−
SEK
|
— |
131,000,000
SEK
|
— |
−
SEK
|
36,000,000
SEK
|
−
SEK
|
−
SEK
|
36,000,000
SEK
|
— | — | — | — | — | — |
36,000,000
SEK
|
— |
0
SEK
|
−
SEK
|
— | — | — | — | — | — | — | — |
| Comprehensive income |
327,000,000
SEK
|
— |
3 37
SEK
|
— |
10,000,000
SEK
|
20 6
SEK
|
— |
0
SEK
|
−
SEK
|
— | — | — | — |
−
SEK
|
— |
13 1
SEK
|
— |
−
SEK
|
80 7
SEK
|
7 72
SEK
|
−
SEK
|
36,000,000
SEK
|
— | — | — | — | — | — |
80 7
SEK
|
— |
0
SEK
|
−
SEK
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
−
SEK
|
−
SEK
|
−
SEK
|
−
SEK
|
−
SEK
|
— | — | — | — | — | — |
−
SEK
|
— |
−
SEK
|
0
SEK
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity |
−
SEK
|
— |
3,000,000
SEK
|
— |
3,000,000
SEK
|
3,000,000
SEK
|
— |
−
SEK
|
−
SEK
|
— | — | — | — |
−
SEK
|
— |
−
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |