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 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 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 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
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] | ||||||||||||||||||||||||||||||
| Property, plant and equipment | — | — |
3,168,000,000
SEK
|
— | — | — | — | — | — | — | — |
2,992,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets | — | — |
685,000,000
SEK
|
— | — | — | — | — | — | — | — |
283,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents | — | — |
5,416,000,000
SEK
|
— | — | — | — | — | — | — | — |
4,668,000,000
SEK
|
— | — | — | — | — | — |
4,453,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Assets | — | — |
4 729,0
SEK
|
— | — | — | — | — | — | — | — |
4 249,5
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||||||||
| Issued capital | — | — |
12,000,000
SEK
|
— | — | — | — | — | — | — | — |
12,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings | — | — |
1 293,0
SEK
|
— | — | — | — | — | — | — | — |
1 007,6
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other reserves | — | — |
773,000,000
SEK
|
— | — | — | — | — | — | — | — |
539,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent | — | — |
1 717,4
SEK
|
— | — | — | — | — | — | — | — |
1 300,8
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
1 293,0
SEK
|
3,459,000,000
SEK
|
1 717,4
SEK
|
–
SEK
|
773,000,000
SEK
|
12,000,000
SEK
|
1 007,6
SEK
|
–
SEK
|
3,459,000,000
SEK
|
12,000,000
SEK
|
539,000,000
SEK
|
1 300,8
SEK
|
1 382,0
SEK
|
12,000,000
SEK
|
12,000,000
SEK
|
–
SEK
|
1,328,000,000
SEK
|
3,459,000,000
SEK
|
1 382,0
SEK
|
1,328,000,000
SEK
|
9,021,000,000
SEK
|
12,000,000
SEK
|
–
SEK
|
–
SEK
|
12,000,000
SEK
|
3,459,000,000
SEK
|
–
SEK
|
12,000,000
SEK
|
–
SEK
|
9,009,000,000
SEK
|
| Liabilities [abstract] | ||||||||||||||||||||||||||||||
| Deferred tax liabilities | — | — |
715,000,000
SEK
|
— | — | — | — | — | — | — | — |
214,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Liabilities | — | — |
3 011,6
SEK
|
— | — | — | — | — | — | — | — |
2 948,7
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities | — | — |
4 729,0
SEK
|
— | — | — | — | — | — | — | — |
4 249,5
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |