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 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 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 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | |||||||||||||||||||||
| Assets [abstract] | |||||||||||||||||||||
| Property, plant and equipment |
8,933,000,000
SEK
|
— | — | — | — | — | — |
8,175,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets |
4 385,4
SEK
|
— | — | — | — | — | — |
4 152,1
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Deferred tax assets |
3,911,000,000
SEK
|
— | — | — | — | — | — |
3,866,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
1 106,6
SEK
|
— | — | — | — | — | — |
9,040,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
8,981,000,000
SEK
|
— | — | — |
| Assets |
15 630,4
SEK
|
— | — | — | — | — | — |
14 574,1
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||
| Issued capital |
3,536,000,000
SEK
|
— | — | — | — | — | — |
3,536,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
1 740,9
SEK
|
— | — | — | — | — | — |
1 673,4
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Other reserves |
4,663,000,000
SEK
|
— | — | — | — | — | — |
5,322,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent |
3 836,4
SEK
|
— | — | — | — | — | — |
3 834,8
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests |
278,000,000
SEK
|
— | — | — | — | — | — |
355,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity |
3 864,2
SEK
|
1 740,9
SEK
|
4,663,000,000
SEK
|
278,000,000
SEK
|
3,536,000,000
SEK
|
3 836,4
SEK
|
1 275,6
SEK
|
3 870,3
SEK
|
5,322,000,000
SEK
|
355,000,000
SEK
|
1 673,4
SEK
|
3,536,000,000
SEK
|
3 834,8
SEK
|
1 275,6
SEK
|
1 420,2
SEK
|
2,271,000,000
SEK
|
1 275,6
SEK
|
3 303,9
SEK
|
3 276,5
SEK
|
274,000,000
SEK
|
3,536,000,000
SEK
|
| Liabilities [abstract] | |||||||||||||||||||||
| Deferred tax liabilities |
2,967,000,000
SEK
|
— | — | — | — | — | — |
2,366,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities |
15 630,4
SEK
|
— | — | — | — | — | — |
14 574,1
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |