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 |
0
SEK
|
—
SEK
|
357,000,000
SEK
|
356,000,000
SEK
|
—
SEK
|
—
SEK
|
0
SEK
|
—
SEK
|
2,000,000
SEK
|
2,000,000
SEK
|
| Share issue related cost |
—
SEK
|
—
SEK
|
14,000,000
SEK
|
14,000,000
SEK
|
—
SEK
|
— | — | — | — | — |