Statement Of Changes In Equity [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||
| Statement of changes in equity [line items] | ||||||||||
| Dividends recognised as distributions to owners of parent, relating to current year | — |
1 111
SEK
|
1 111
SEK
|
— | — |
935,000,000
SEK
|
— |
935,000,000
SEK
|
— | — |
| Increase (decrease) through exercise of options, equity | — |
34,000,000
SEK
|
34,000,000
SEK
|
— | — | — | — | — |
31,000,000
SEK
|
31,000,000
SEK
|
| Increase (decrease) through transactions with owners, equity |
36,000,000
SEK
|
3 101
SEK
|
1 111
SEK
|
4 176
SEK
|
1,000,000
SEK
|
896,000,000
SEK
|
38,000,000
SEK
|
935,000,000
SEK
|
— | — |