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 |
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 |
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 |
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 |
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 |
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 | — |
30 403
SEK
|
— | — |
19 861
SEK
|
— |
3 380
SEK
|
— |
237,000,000
SEK
|
— |
136,000,000
SEK
|
30 166
SEK
|
— |
6 789
SEK
|
30 453
SEK
|
— | — | — | — | — |
4 317
SEK
|
415,000,000
SEK
|
18 796
SEK
|
136,000,000
SEK
|
30 038
SEK
|
6 789
SEK
|
— | — |
16 579
SEK
|
1 245
SEK
|
6 789
SEK
|
25 176
SEK
|
24 750
SEK
|
427,000,000
SEK
|
136,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||
| Profit (loss) |
2 428
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2 516
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income |
1 128
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
3 924
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
1 301
SEK
|
— |
1 285
SEK
|
937,000,000
SEK
|
— |
15,000,000
SEK
|
— |
2 223
SEK
|
— |
–
SEK
|
— | — |
–
SEK
|
— | — |
–
SEK
|
3 072
SEK
|
6 440
SEK
|
3 307
SEK
|
62,000,000
SEK
|
— | — | — | — | — | — |
6 378
SEK
|
–
SEK
|
— | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
1 18 1
SEK
|
— |
1 158
SEK
|
–
SEK
|
— |
2 3
SEK
|
— |
1 158
SEK
|
— |
–
SEK
|
— | — |
–
SEK
|
— | — |
–
SEK
|
–
SEK
|
1 111
SEK
|
1 0 89
SEK
|
2 1
SEK
|
— | — | — | — | — | — |
1 0 89
SEK
|
–
SEK
|
— | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity |
17 0
SEK
|
— |
–
SEK
|
–
SEK
|
— |
17 0
SEK
|
— |
–
SEK
|
— |
–
SEK
|
— | — |
–
SEK
|
— | — |
–
SEK
|
–
SEK
|
53,000,000
SEK
|
–
SEK
|
53,000,000
SEK
|
— | — | — | — | — | — |
–
SEK
|
–
SEK
|
— | — | — | — | — | — | — |