Statement Of Changes In Equity [Abstract]
| Concept |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||
| Equity |
61 4 ,1
SEK
|
— | — | — |
9, 7
SEK
|
58 2,9
SEK
|
200,000,000
SEK
|
1, 5
SEK
|
— |
5,324,000,000
SEK
|
9,000,000
SEK
|
0
SEK
|
— |
5 51, 5
SEK
|
200,000,000
SEK
|
— | — |
4 1 3,2
SEK
|
0
SEK
|
200,000,000
SEK
|
29,000,000
SEK
|
4,303,000,000
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||
| Other comprehensive income | — |
1 0,6
SEK
|
1 0,6
SEK
|
— | — | — | — | — | — | — | — | — |
20,000,000
SEK
|
— | — |
20,000,000
SEK
|
— | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — |
7 0,0
SEK
|
7 0,0
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
47 ,5
SEK
|
47 ,5
SEK
|
— | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — |
1, 5
SEK
|
— | — | — | — | — |
1, 5
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |