Statement Of Changes In Equity [Abstract]
| Concept |
2020-12-31 to 2021-12-31 |
2020-12-31 to 2021-12-31 |
2020-12-31 to 2021-12-31 |
2020-12-31 to 2021-12-31 |
2020-12-31 to 2021-12-31 |
|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||
| Statement of changes in equity [line items] | |||||
| Increase (decrease) through appropriation of retained earnings, equity |
8,000,000
SEK
|
–
SEK
|
8,000,000
SEK
|
–
SEK
|
–
SEK
|
| Purchase of treasury shares |
–
SEK
|
–
SEK
|
922,000,000
SEK
|
–
SEK
|
922,000,000
SEK
|
| Cancellation of treasury shares |
8,000,000
SEK
|
–
SEK
|
8,000,000
SEK
|
–
SEK
|
–
SEK
|