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 |
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 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 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 |
2 092,5
SEK
|
— | — | — | — |
885,000,000
SEK
|
5,780,000,000
SEK
|
25,000,000
SEK
|
1 423,5
SEK
|
— |
3,644,000,000
SEK
|
156,000,000
SEK
|
8,873,000,000
SEK
|
— |
1 269,6
SEK
|
— |
23,000,000
SEK
|
— | — | — |
2,058,000,000
SEK
|
8,447,000,000
SEK
|
23,000,000
SEK
|
62,000,000
SEK
|
1 046,5
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||
| Profit (loss) | — | — | — |
2,719,000,000
SEK
|
2,719,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
1,857,000,000
SEK
|
1,857,000,000
SEK
|
— | — | — | — | — |
| Other comprehensive income | — | — | — |
729,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
218,000,000
SEK
|
— | — | — | — | — | — |
| Comprehensive income | — |
-
SEK
|
729,000,000
SEK
|
3,448,000,000
SEK
|
2,719,000,000
SEK
|
— | — | — | — |
-
SEK
|
— | — | — |
218,000,000
SEK
|
— |
-
SEK
|
— |
-
SEK
|
2,075,000,000
SEK
|
1,857,000,000
SEK
|
— | — | — | — | — |
| Issue of equity | — |
2,000,000
SEK
|
— |
4,095,000,000
SEK
|
— | — | — | — | — |
4,094,000,000
SEK
|
— | — | — | — | — |
0
SEK
|
— |
347,000,000
SEK
|
347,000,000
SEK
|
— | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — | — |
583,000,000
SEK
|
583,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
271,000,000
SEK
|
271,000,000
SEK
|
— | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — |
17,000,000
SEK
|
— | — | — | — | — |
17,000,000
SEK
|
— | — | — | — | — | — | — |
79,000,000
SEK
|
79,000,000
SEK
|
— | — | — | — | — | — |