Statement Of Financial Position [Abstract]
| Concept |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
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 |
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 financial position [abstract] | |||||||||||||||
| Assets [abstract] | |||||||||||||||
| Property, plant and equipment | — | — |
16,000,000
SEK
|
— | — | — | — | — | — |
30,000,000
SEK
|
— | — | — | — | — |
| Right-of-use assets | — | — |
84,000,000
SEK
|
— | — | — | — | — | — |
144,000,000
SEK
|
— | — | — | — | — |
| Deferred tax assets | — | — |
560,000,000
SEK
|
— | — | — | — | — | — |
1,716,000,000
SEK
|
— | — | — | — | — |
| Cash and cash equivalents | — | — |
121,000,000
SEK
|
— | — | — | — | — | — |
1,099,000,000
SEK
|
2,741,000,000
SEK
|
— | — | — | — |
| Assets | — | — |
4,250,000,000
SEK
|
— | — | — | — | — | — |
1 083,6
SEK
|
— | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||
| Equity [abstract] | |||||||||||||||
| Issued capital | — | — |
1,597,000,000
SEK
|
— | — | — | — | — | — |
260,000,000
SEK
|
— | — | — | — | — |
| Equity |
9,277,000,000
SEK
|
8,543,000,000
SEK
|
2,766,000,000
SEK
|
1,597,000,000
SEK
|
1,903,000,000
SEK
|
260,000,000
SEK
|
1,458,000,000
SEK
|
8,543,000,000
SEK
|
3,345,000,000
SEK
|
6,916,000,000
SEK
|
8,665,000,000
SEK
|
185,000,000
SEK
|
1,663,000,000
SEK
|
1,726,000,000
SEK
|
8,543,000,000
SEK
|
| Liabilities [abstract] | |||||||||||||||
| Deferred tax liabilities | — | — |
7,000,000
SEK
|
— | — | — | — | — | — |
66,000,000
SEK
|
— | — | — | — | — |
| Equity and liabilities | — | — |
4,250,000,000
SEK
|
— | — | — | — | — | — |
1 083,6
SEK
|
— | — | — | — | — |