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 |
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 |
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 | — |
6 601
SEK
|
— |
1 226
SEK
|
— | — | — |
5,000,000
SEK
|
— |
4 569
SEK
|
— |
434,000,000
SEK
|
366,000,000
SEK
|
6 596
SEK
|
7 984
SEK
|
— | — | — | — |
5,000,000
SEK
|
4 569
SEK
|
2 563
SEK
|
434,000,000
SEK
|
413,000,000
SEK
|
7 979
SEK
|
— | — | — |
3 245
SEK
|
8 322
SEK
|
8 318
SEK
|
4 569
SEK
|
70,000,000
SEK
|
434,000,000
SEK
|
5,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||
| Profit (loss) |
1 337
SEK
|
— |
1 337
SEK
|
— | — |
1 337
SEK
|
— | — | — | — | — | — | — | — | — | — |
303,000,000
SEK
|
303,000,000
SEK
|
— | — | — | — | — | — | — |
303,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Other comprehensive income |
47,000,000
SEK
|
— |
47,000,000
SEK
|
— | — | — | — | — |
47,000,000
SEK
|
— | — | — | — | — | — | — |
344,000,000
SEK
|
— | — | — | — | — | — | — | — |
344,000,000
SEK
|
— |
344,000,000
SEK
|
— | — | — | — | — | — | — |
| Comprehensive income |
1 384
SEK
|
— |
1 384
SEK
|
— |
0
SEK
|
1 337
SEK
|
0
SEK
|
— |
47,000,000
SEK
|
— |
0
SEK
|
— | — | — | — |
0
SEK
|
41,000,000
SEK
|
303,000,000
SEK
|
0
SEK
|
— | — | — | — | — | — |
41,000,000
SEK
|
0
SEK
|
344,000,000
SEK
|
— | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
375,000,000
SEK
|
375,000,000
SEK
|
— | — | — | — | — | — | — |
375,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
0
SEK
|
— |
0
SEK
|
— | — |
0
SEK
|
— | — | — | — | — | — | — | — | — | — |
4,000,000
SEK
|
4,000,000
SEK
|
— | — | — | — | — | — | — |
4,000,000
SEK
|
— | — | — | — | — | — | — | — | — |