Statement Of Changes In Equity [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2020-01-01 to 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 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 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 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||
| Equity | — |
876 229
SEK
|
81 417
SEK
|
218 318
SEK
|
— | — |
1 177 134
SEK
|
1 177 134
SEK
|
-
SEK
|
— |
1 170
SEK
|
— | — | — | — |
897 518
SEK
|
16 730
SEK
|
218 318
SEK
|
1 203 758
SEK
|
1 170
SEK
|
— |
86 752
SEK
|
— | — | — |
1 220 488
SEK
|
— | — |
998 460
SEK
|
11 923
SEK
|
9 9 74 8
SEK
|
218 318
SEK
|
1 010 383
SEK
|
679 224
SEK
|
1 170
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — | — | — | — | — | — | — | — | — | — |
362 426
SEK
|
— |
22 0 414
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — | — | — | — |
5 335
SEK
|
— |
12 9 96
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
7 574
SEK
|
— | — | — |
5 335
SEK
|
3 4 9 517
SEK
|
— | — | — |
-
SEK
|
— |
-
SEK
|
357 091
SEK
|
354 852
SEK
|
20 7 417
SEK
|
— | — | — | — | — |
223 488
SEK
|
— |
12 9 9 6
SEK
|
-
SEK
|
-
SEK
|
— |
3 074
SEK
|
210 491
SEK
|
— | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
-
SEK
|
— | — | — |
-
SEK
|
93 323
SEK
|
— | — | — |
-
SEK
|
— |
-
SEK
|
93 323
SEK
|
93 323
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity |
24 304
SEK
|
— | — | — |
-
SEK
|
273 471
SEK
|
— | — | — |
-
SEK
|
— |
-
SEK
|
297 775
SEK
|
273 471
SEK
|
13 41 9
SEK
|
— | — | — | — | — |
5 620
SEK
|
— |
-
SEK
|
-
SEK
|
-
SEK
|
— |
7 799
SEK
|
5 620
SEK
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
-
SEK
|
— | — | — |
-
SEK
|
9 465
SEK
|
— | — | — |
-
SEK
|
— |
-
SEK
|
9 465
SEK
|
9 465
SEK
|
6 427
SEK
|
— | — | — | — | — |
6 427
SEK
|
— |
-
SEK
|
-
SEK
|
-
SEK
|
— |
-
SEK
|
6 427
SEK
|
— | — | — | — | — | — | — |