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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||
| Property, plant and equipment |
9,431,000,000
SEK
|
— | — | — | — | — |
7,758,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Right-of-use assets |
44,000,000
SEK
|
— | — | — | — | — |
84,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Investment property |
9,298,000,000
SEK
|
— | — | — | — | — |
7,588,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Non-current assets |
1 102,3
SEK
|
— | — | — | — | — |
8,123,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||
| Other current non-financial assets |
4,244,000,000
SEK
|
— | — | — | — | — |
1,022,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Cash and cash equivalents |
6,308,000,000
SEK
|
— | — | — | — | — |
5,104,000,000
SEK
|
— | — | — | — | — | — | — | — |
5,326,000,000
SEK
|
— | — |
| Current assets |
5 257,1
SEK
|
— | — | — | — | — |
2 406,0
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Assets |
6 359,4
SEK
|
— | — | — | — | — |
3 218,3
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||
| Issued capital |
1,551,000,000
SEK
|
— | — | — | — | — |
1,551,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Retained earnings |
9,607,000,000
SEK
|
— | — | — | — | — |
9,208,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity attributable to owners of parent |
1 511,8
SEK
|
— | — | — | — | — |
1 469,7
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Non-controlling interests |
87,000,000
SEK
|
— | — | — | — | — |
47,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity |
1 520,5
SEK
|
9,607,000,000
SEK
|
1 511,8
SEK
|
3,960,000,000
SEK
|
87,000,000
SEK
|
1,551,000,000
SEK
|
1 474,4
SEK
|
1,551,000,000
SEK
|
9,208,000,000
SEK
|
47,000,000
SEK
|
3,938,000,000
SEK
|
1 469,7
SEK
|
6,827,000,000
SEK
|
0
SEK
|
1 229,9
SEK
|
1 229,9
SEK
|
3,921,000,000
SEK
|
1,551,000,000
SEK
|
| Liabilities [abstract] | ||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||
| Non-current provisions [abstract] | ||||||||||||||||||
| Other non-current provisions |
27,000,000
SEK
|
— | — | — | — | — |
38,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Deferred tax liabilities |
409,000,000
SEK
|
— | — | — | — | — |
312,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Non-current liabilities |
8,708,000,000
SEK
|
— | — | — | — | — |
650,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||
| Current provisions [abstract] | ||||||||||||||||||
| Current provisions |
37,000,000
SEK
|
— | — | — | — | — |
41,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Trade and other current payables |
435,000,000
SEK
|
— | — | — | — | — |
226,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Current liabilities |
3 968,1
SEK
|
— | — | — | — | — |
1 678,9
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Liabilities |
4 838,9
SEK
|
— | — | — | — | — |
1 743,9
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Equity and liabilities |
6 359,4
SEK
|
— | — | — | — | — |
3 218,3
SEK
|
— | — | — | — | — | — | — | — | — | — | — |