Statement Of Changes In Equity [Abstract]
| Concept |
As at 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
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 |
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 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
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 |
As at 2022-12-31 |
As at 2022-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||||||
| Equity |
29,000,000
SEK
|
1 109
SEK
|
— | — | — | — |
3 829
SEK
|
— |
30,000,000
SEK
|
0
SEK
|
973,000,000
SEK
|
— |
5 596
SEK
|
— | — | — |
1 367
SEK
|
— |
2 160
SEK
|
6 705
SEK
|
— |
5 921
SEK
|
— |
–
SEK
|
1 109
SEK
|
— |
2 951
SEK
|
— |
–
SEK
|
— |
30,000,000
SEK
|
633,000,000
SEK
|
4 812
SEK
|
1 077
SEK
|
2 275
SEK
|
— |
5 666
SEK
|
1 106
SEK
|
2 573
SEK
|
30,000,000
SEK
|
369,000,000
SEK
|
4 560
SEK
|
2 275
SEK
|
687,000,000
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — |
134,000,000
SEK
|
— |
879,000,000
SEK
|
— | — | — | — | — | — |
879,000,000
SEK
|
— |
0
SEK
|
1 013
SEK
|
— | — | — | — | — |
6 63
SEK
|
— |
152,000,000
SEK
|
— | — |
511,000,000
SEK
|
— |
511,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — |
29,000,000
SEK
|
20,000,000
SEK
|
— | — |
340,000,000
SEK
|
— | — | — |
1,000,000
SEK
|
— | — |
20,000,000
SEK
|
290,000,000
SEK
|
— | — | — | — |
12 5
SEK
|
— | — | — | — |
125,000,000
SEK
|
— |
1,000,000
SEK
|
— |
26 4
SEK
|
— | — | — | — | — |
390,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Comprehensive income | — | — |
134,000,000
SEK
|
29,000,000
SEK
|
899,000,000
SEK
|
— | — |
340,000,000
SEK
|
— | — | — |
878,000,000
SEK
|
— |
0
SEK
|
1 033
SEK
|
290,000,000
SEK
|
— | — | — | — |
538,000,000
SEK
|
— |
152,000,000
SEK
|
— | — |
386,000,000
SEK
|
— |
512,000,000
SEK
|
— |
264,000,000
SEK
|
— | — | — | — | — |
390,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Issue of equity | — | — | — | — |
86,000,000
SEK
|
0
SEK
|
— | — | — | — | — | — | — | — |
86,000,000
SEK
|
— | — |
86,000,000
SEK
|
— | — |
700,000,000
SEK
|
— |
700,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
8,000,000
SEK
|
— | — | — | — |
8,000,000
SEK
|
— |
8,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
4,000,000
SEK
|
— | — | — | — |
4,000,000
SEK
|
— |
4,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |