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 2021-01-01 |
As at 2021-01-01 |
As at 2021-01-01 |
As at 2021-01-01 |
As at 2021-01-01 |
As at 2021-01-01 |
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 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
As at 2020-01-01 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||||||||
| Investment property | — |
17 335
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
12 582
SEK
|
— | — | — | — | — | — |
| Investments in subsidiaries, joint ventures and associates reported in separate financial statements | — |
724,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
456,000,000
SEK
|
— | — | — | — | — | — |
| Trade and other non-current receivables | — |
129,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
-
SEK
|
— | — | — | — | — | — |
| Non-current assets | — |
18 322
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
13 156
SEK
|
— | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||||||||
| Trade and other current receivables | — |
75,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
47,000,000
SEK
|
— | — | — | — | — | — |
| Cash and cash equivalents | — |
269,000,000
SEK
|
— | — | — | — | — |
104,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
104,000,000
SEK
|
— | — |
192,000,000
SEK
|
— | — | — |
| Current assets | — |
395,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
197,000,000
SEK
|
— | — | — | — | — | — |
| Assets | — |
18 718
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
13 352
SEK
|
— | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||
| Equity |
4 041
SEK
|
6 743
SEK
|
6 698
SEK
|
2 334
SEK
|
46,000,000
SEK
|
324,000,000
SEK
|
288,000,000
SEK
|
4 637
SEK
|
2 294
SEK
|
2 045
SEK
|
4 627
SEK
|
11,000,000
SEK
|
2 294
SEK
|
11,000,000
SEK
|
4 627
SEK
|
288,000,000
SEK
|
2 045
SEK
|
4 637
SEK
|
277,000,000
SEK
|
1 888
SEK
|
4 140
SEK
|
8,000,000
SEK
|
1 968
SEK
|
4 132
SEK
|
| Liabilities [abstract] | ||||||||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||||||||
| Deferred tax liabilities | — |
969,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
568,000,000
SEK
|
— | — | — | — | — | — |
| Non-current liabilities | — |
10 369
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
8 128
SEK
|
— | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||||||||
| Other current non-financial liabilities | — |
248,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
175,000,000
SEK
|
— | — | — | — | — | — |
| Current liabilities | — |
1 606
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
587,000,000
SEK
|
— | — | — | — | — | — |
| Equity and liabilities | — |
18 718
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
13 352
SEK
|
— | — | — | — | — | — |