Statement Of Changes In Equity [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
2021-01-01 to 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 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||
| Statement of changes in equity [line items] | ||||||||||
| Increase (decrease) through transactions with owners, equity |
–
SEK
|
–
SEK
|
2 782
SEK
|
112 991
SEK
|
110 209
SEK
|
88 305
SEK
|
–
SEK
|
99 561
SEK
|
11 256
SEK
|
–
SEK
|
| Purchase of treasury shares | — | — | — | — | — | — | — |
16 032
SEK
|
16 032
SEK
|
— |
| Sale or issue of treasury shares | — | — |
2 071
SEK
|
2 071
SEK
|
— | — | — |
2 143
SEK
|
2 143
SEK
|
— |