Statement Of Financial Position [Abstract]
| Concept |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||
| Assets [abstract] | ||||||||||||
| Non-current assets [abstract] | ||||||||||||
| Goodwill |
455,000,000
SEK
|
— | — | — |
455,000,000
SEK
|
— | — | — | — | — | — | — |
| Deferred tax assets |
32,000,000
SEK
|
— | — | — |
62,000,000
SEK
|
— | — | — | — | — | — | — |
| Non-current assets |
2,554,000,000
SEK
|
— | — | — |
2,402,000,000
SEK
|
— | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||
| Other current financial assets |
91,000,000
SEK
|
— | — | — |
45,000,000
SEK
|
— | — | — | — | — | — | — |
| Cash and cash equivalents |
816,000,000
SEK
|
— | — | — |
694,000,000
SEK
|
— | — | — | — | — |
408,000,000
SEK
|
— |
| Current assets |
6,815,000,000
SEK
|
— | — | — |
5,031,000,000
SEK
|
— | — | — | — | — | — | — |
| Assets |
9,369,000,000
SEK
|
— | — | — |
7,433,000,000
SEK
|
— | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||
| Equity [abstract] | ||||||||||||
| Issued capital |
200,000,000
SEK
|
— | — | — |
200,000,000
SEK
|
— | — | — | — | — | — | — |
| Retained earnings |
5,324,000,000
SEK
|
— | — | — |
4,074,000,000
SEK
|
— | — | — | — | — | — | — |
| Other reserves |
9,000,000
SEK
|
— | — | — |
29,000,000
SEK
|
— | — | — | — | — | — | — |
| Equity |
5,515,000,000
SEK
|
5,324,000,000
SEK
|
9,000,000
SEK
|
200,000,000
SEK
|
4,303,000,000
SEK
|
200,000,000
SEK
|
4,132,000,000
SEK
|
29,000,000
SEK
|
3,182,000,000
SEK
|
48,000,000
SEK
|
3,430,000,000
SEK
|
200,000,000
SEK
|
| Liabilities [abstract] | ||||||||||||
| Non-current liabilities [abstract] | ||||||||||||
| Non-current provisions [abstract] | ||||||||||||
| Other non-current provisions |
63,000,000
SEK
|
— | — | — |
37,000,000
SEK
|
— | — | — | — | — | — | — |
| Deferred tax liabilities |
0
SEK
|
— | — | — |
5,000,000
SEK
|
— | — | — | — | — | — | — |
| Non-current liabilities |
591,000,000
SEK
|
— | — | — |
627,000,000
SEK
|
— | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||
| Trade and other current payables |
1,665,000,000
SEK
|
— | — | — |
1,239,000,000
SEK
|
— | — | — | — | — | — | — |
| Current liabilities |
3,263,000,000
SEK
|
— | — | — |
2,503,000,000
SEK
|
— | — | — | — | — | — | — |
| Liabilities |
3,854,000,000
SEK
|
— | — | — |
3,130,000,000
SEK
|
— | — | — | — | — | — | — |
| Equity and liabilities |
9,369,000,000
SEK
|
— | — | — |
7,433,000,000
SEK
|
— | — | — | — | — | — | — |