Statement Of Financial Position [Abstract]
| Concept |
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 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||
| Assets [abstract] | |||||||||||||||
| Property, plant and equipment |
3,901,000,000
SEK
|
— | — | — | — |
3,168,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Deferred tax assets |
1,040,000,000
SEK
|
— | — | — | — |
685,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
7,212,000,000
SEK
|
— | — | — | — |
5,416,000,000
SEK
|
— | — | — | — |
4,668,000,000
SEK
|
— | — | — | — |
| Assets |
6 220,1
SEK
|
— | — | — | — |
4 729,0
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||
| Equity [abstract] | |||||||||||||||
| Issued capital |
12,000,000
SEK
|
— | — | — | — |
12,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Retained earnings |
1 526,2
SEK
|
— | — | — | — |
1 293,0
SEK
|
— | — | — | — | — | — | — | — | — |
| Other reserves |
3,132,000,000
SEK
|
— | — | — | — |
773,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent |
2 186,5
SEK
|
— | — | — | — |
1 717,4
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity |
2 186,5
SEK
|
1 526,2
SEK
|
12,000,000
SEK
|
3,132,000,000
SEK
|
3,459,000,000
SEK
|
1 717,4
SEK
|
1 293,0
SEK
|
3,459,000,000
SEK
|
773,000,000
SEK
|
12,000,000
SEK
|
1 300,8
SEK
|
12,000,000
SEK
|
1 007,6
SEK
|
539,000,000
SEK
|
3,459,000,000
SEK
|
| Liabilities [abstract] | |||||||||||||||
| Deferred tax liabilities |
1,190,000,000
SEK
|
— | — | — | — |
715,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Liabilities |
4 033,6
SEK
|
— | — | — | — |
3 011,6
SEK
|
— | — | — | — | — | — | — | — | — |
| Equity and liabilities |
6 220,1
SEK
|
— | — | — | — |
4 729,0
SEK
|
— | — | — | — | — | — | — | — | — |