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 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||
| Assets [abstract] | ||||||||||||
| Property, plant and equipment |
36 921,8
SEK
|
— | — | — |
36 489,4
SEK
|
— | — | — | — | — | — | — |
| Right-of-use assets |
1 190,0
SEK
|
— | — | — |
1 165,0
SEK
|
— | — | — | — | — | — | — |
| Cash and cash equivalents |
1,820,000,000
SEK
|
— | — | — |
2,107,000,000
SEK
|
— | — | — |
1,471,000,000
SEK
|
— | — | — |
| Assets |
38 124,0
SEK
|
— | — | — |
37 922,1
SEK
|
— | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||
| Equity [abstract] | ||||||||||||
| Issued capital |
6,596,000,000
SEK
|
— | — | — |
6,786,000,000
SEK
|
— | — | — | — | — | — | — |
| Retained earnings |
13 691,1
SEK
|
— | — | — |
14 186,8
SEK
|
— | — | — | — | — | — | — |
| Equity attributable to owners of parent |
16 402,1
SEK
|
13 691,2
SEK
|
6,596,000,000
SEK
|
2 051,4
SEK
|
— | — | — | — | — | — | — | — |
| Equity |
16 402,1
SEK
|
13 691,1
SEK
|
6,596,000,000
SEK
|
2 051,4
SEK
|
17 457,4
SEK
|
14 186,8
SEK
|
2 592,0
SEK
|
6,786,000,000
SEK
|
14 057,40
SEK
|
6,581,000,000
SEK
|
11 280,80
SEK
|
2 118,50
SEK
|
| Liabilities [abstract] | ||||||||||||
| Deferred tax liabilities |
3 172,3
SEK
|
— | — | — |
3 227,4
SEK
|
— | — | — | — | — | — | — |
| Liabilities |
21 721,9
SEK
|
— | — | — |
20 464,7
SEK
|
— | — | — | — | — | — | — |
| Equity and liabilities |
38 124,0
SEK
|
— | — | — |
37 922,1
SEK
|
— | — | — | — | — | — | — |