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 |
|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||
| Statement of changes in equity [line items] | ||||||
| Dividends recognised as distributions to owners of parent, relating to prior years | — | — |
697,000,000
SEK
|
697,000,000
SEK
|
— | — |
| Dividends recognised as distributions to owners of parent, relating to current year | — | — |
7 76
SEK
|
7 76
SEK
|
— | — |
| Increase (decrease) through exercise of options, equity | — | — |
31,000,000
SEK
|
31,000,000
SEK
|
14,000,000
SEK
|
14,000,000
SEK
|
| Increase (decrease) through transactions with owners, equity |
4 81
SEK
|
0.32
SEK
|
5.13
SEK
|
— | — | — |
| Purchase of treasury shares | — |
29,000,000
SEK
|
571,000,000
SEK
|
54 3
SEK
|
— | — |
| Share issue related cost |
5,000,000
SEK
|
— |
1,000,000
SEK
|
1,000,000
SEK
|
— |
5,000,000
SEK
|