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 2023-01-01 |
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 2022-01-01 |
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] | |||||||||||||||||
| Non-current assets [abstract] | |||||||||||||||||
| Property, plant and equipment | — | — | — |
168,000,000
SEK
|
— | — |
139,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
| Intangible assets other than goodwill | — | — | — |
1,987,000,000
SEK
|
— | — |
1,687,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
| Deferred tax assets | — | — | — |
560,000,000
SEK
|
— | — |
602,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | |||||||||||||||||
| Cash and cash equivalents | — | — | — |
1,010,000,000
SEK
|
— |
9,006,000,000
SEK
|
9,006,000,000
SEK
|
— | — | — | — |
575,000,000
SEK
|
— | — | — | — | — |
| Assets | — | — | — |
3 694,9
SEK
|
— | — |
4 204,9
SEK
|
— | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||
| Equity [abstract] | |||||||||||||||||
| Issued capital | — | — | — |
534,000,000
SEK
|
— | — |
534,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
| Other reserves | — | — | — |
40,000,000
SEK
|
— | — |
39,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
| Equity |
25,000,000
SEK
|
534,000,000
SEK
|
4,282,000,000
SEK
|
4,802,000,000
SEK
|
40,000,000
SEK
|
— |
4,705,000,000
SEK
|
25,000,000
SEK
|
4,185,000,000
SEK
|
534,000,000
SEK
|
39,000,000
SEK
|
— |
503,000,000
SEK
|
5,481,000,000
SEK
|
4,953,000,000
SEK
|
1,000,000
SEK
|
25,000,000
SEK
|
| Liabilities [abstract] | |||||||||||||||||
| Liabilities | — | — | — |
3 214,7
SEK
|
— | — |
3 734,4
SEK
|
— | — | — | — | — | — | — | — | — | — |
| Equity and liabilities | — | — | — |
3 694,9
SEK
|
— | — |
4 204,9
SEK
|
— | — | — | — | — | — | — | — | — | — |