Statement Of Financial Position [Abstract]
| Concept |
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 |
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 financial position [abstract] | |||||||||||||||
| Assets [abstract] | |||||||||||||||
| Property, plant and equipment | — | — | — | — |
1 828
SEK
|
560,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Deferred tax assets | — | — | — | — |
127,000,000
SEK
|
78,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — | — |
426,000,000
SEK
|
1 688
SEK
|
— | — | — | — |
768,000,000
SEK
|
— | — | — | — |
| Assets | — | — | — | — |
4 705
SEK
|
3 217
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||
| Equity [abstract] | |||||||||||||||
| Issued capital | — | — | — | — |
1,000,000
SEK
|
1,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — | — |
1 013
SEK
|
1 229
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity |
1,000,000
SEK
|
22,000,000
SEK
|
1 013
SEK
|
630,000,000
SEK
|
1 622
SEK
|
1 873
SEK
|
1 229
SEK
|
1,000,000
SEK
|
13,000,000
SEK
|
630,000,000
SEK
|
1 101
SEK
|
789,000,000
SEK
|
620,000,000
SEK
|
309,000,000
SEK
|
1,000,000
SEK
|
| Liabilities [abstract] | |||||||||||||||
| Deferred tax liabilities | — | — | — | — |
277,000,000
SEK
|
1,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — | — |
3 083
SEK
|
1 344
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities | — | — | — | — |
4 705
SEK
|
3 217
SEK
|
— | — | — | — | — | — | — | — | — |