Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
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 |
21,000,000
SEK
|
— |
1 513
SEK
|
— |
346,000,000
SEK
|
— | — |
34,000,000
SEK
|
— |
4,000,000
SEK
|
1 479
SEK
|
1 150
SEK
|
1 336
SEK
|
— | — | — |
143,000,000
SEK
|
4,000,000
SEK
|
80,000,000
SEK
|
1 301
SEK
|
1 074
SEK
|
— | — |
44,000,000
SEK
|
907,000,000
SEK
|
896,000,000
SEK
|
896,000,000
SEK
|
–
SEK
|
29,000,000
SEK
|
4,000,000
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||
| Profit (loss) | — |
218,000,000
SEK
|
— |
216,000,000
SEK
|
— |
2,000,000
SEK
|
216,000,000
SEK
|
— | — | — | — | — | — |
184,000,000
SEK
|
184,000,000
SEK
|
— | — | — | — | — | — |
184,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Other comprehensive income | — |
103,000,000
SEK
|
— |
101,000,000
SEK
|
— |
2,000,000
SEK
|
— | — |
101,000,000
SEK
|
— | — | — | — |
51,000,000
SEK
|
— | — | — | — | — | — | — |
51,000,000
SEK
|
51,000,000
SEK
|
— | — | — | — | — | — | — |
| Comprehensive income | — |
115,000,000
SEK
|
— |
115,000,000
SEK
|
— |
0
SEK
|
216,000,000
SEK
|
— |
101,000,000
SEK
|
— | — | — | — |
235,000,000
SEK
|
184,000,000
SEK
|
–
SEK
|
— | — | — | — | — |
235,000,000
SEK
|
51,000,000
SEK
|
— | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — |
1,000,000
SEK
|
— | — | — |
1,000,000
SEK
|
— | — | — | — | — | — | — |
35,000,000
SEK
|
— |
35,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity | — | — | — | — | — | — | — | — | — | — | — | — | — |
48,000,000
SEK
|
48,000,000
SEK
|
— | — | — | — | — | — |
48,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
4,000,000
SEK
|
— |
4,000,000
SEK
|
— | — |
4,000,000
SEK
|
— | — | — | — | — | — |
3,000,000
SEK
|
3,000,000
SEK
|
— | — | — | — | — | — |
3,000,000
SEK
|
— | — | — | — | — | — | — | — |