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 |
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 transfer between revaluation surplus and retained earnings, equity |
1 6 6 5
SEK
|
— | — |
1 665
SEK
|
61,000,000
SEK
|
— | — |
61,000,000
SEK
|
| Increase (decrease) through exercise of options, equity | — |
56,000,000
SEK
|
56,000,000
SEK
|
56,000,000
SEK
|
85,000,000
SEK
|
85,000,000
SEK
|
85,000,000
SEK
|
— |
| Purchase of treasury shares | — |
1 4 7
SEK
|
1 4 7
SEK
|
1 4 7
SEK
|
— | — | — | — |