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 2023-12-31 |
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 2021-12-31 |
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 | — | — | — |
1,271,000,000
SEK
|
— | — |
1,200,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets | — | — | — |
456,000,000
SEK
|
— | — |
550,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets | — | — | — |
53,000,000
SEK
|
— | — |
53,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — | — |
503,000,000
SEK
|
— | — |
516,000,000
SEK
|
— | — | — | — | — |
344,000,000
SEK
|
— | — | — | — | — |
| Assets | — | — | — |
8,998,000,000
SEK
|
— | — |
9,228,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||
| Issued capital | — | — | — |
845,000,000
SEK
|
— | — |
845,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — | — |
3,787,000,000
SEK
|
— | — |
3,930,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Other reserves | — | — | — |
133,000,000
SEK
|
— | — |
194,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent | — | — | — |
5,177,000,000
SEK
|
— | — |
5,381,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests | — | — | — |
19,000,000
SEK
|
— | — |
17,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity |
845,000,000
SEK
|
3,787,000,000
SEK
|
412,000,000
SEK
|
5,196,000,000
SEK
|
133,000,000
SEK
|
19,000,000
SEK
|
5,398,000,000
SEK
|
17,000,000
SEK
|
3,930,000,000
SEK
|
845,000,000
SEK
|
195,000,000
SEK
|
412,000,000
SEK
|
5,093,000,000
SEK
|
3,839,000,000
SEK
|
18,000,000
SEK
|
412,000,000
SEK
|
15,000,000
SEK
|
845,000,000
SEK
|
| Liabilities [abstract] | ||||||||||||||||||
| Deferred tax liabilities | — | — | — |
159,000,000
SEK
|
— | — |
199,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — | — |
3,802,000,000
SEK
|
— | — |
3,830,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities | — | — | — |
8,998,000,000
SEK
|
— | — |
9,228,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |