Statement Of Changes In Equity [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
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 |
As at 2021-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||
| Equity | — |
2 182,3
SEK
|
— |
7,129,000,000
SEK
|
430,000,000
SEK
|
— | — |
25,000,000
SEK
|
— |
1 423,9
SEK
|
2 092,5
SEK
|
— | — | — | — |
885,000,000
SEK
|
5,781,000,000
SEK
|
25,000,000
SEK
|
1 423,4
SEK
|
— |
3,644,000,000
SEK
|
156,000,000
SEK
|
8,873,000,000
SEK
|
1 269,6
SEK
|
23,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||
| Profit (loss) |
2,192,000,000
SEK
|
— | — | — | — |
2,192,000,000
SEK
|
— | — | — | — | — | — | — |
2,719,000,000
SEK
|
2,719,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
| Other comprehensive income |
454,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — |
729,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
1,737,000,000
SEK
|
— |
455,000,000
SEK
|
— | — |
2,192,000,000
SEK
|
-
SEK
|
— |
-
SEK
|
— | — |
-
SEK
|
729,000,000
SEK
|
3,448,000,000
SEK
|
2,719,000,000
SEK
|
— | — | — | — |
-
SEK
|
— | — | — | — | — |
| Issue of equity | — | — | — | — | — | — | — | — | — | — | — |
2,000,000
SEK
|
— |
4,095,000,000
SEK
|
— | — | — | — | — |
4,094,000,000
SEK
|
— | — | — | — | — |
| Dividends recognised as distributions to owners |
844,000,000
SEK
|
— | — | — | — |
844,000,000
SEK
|
— | — | — | — | — | — | — |
583,000,000
SEK
|
583,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
43,000,000
SEK
|
— | — | — | — | — | — | — |
43,000,000
SEK
|
— | — | — | — |
17,000,000
SEK
|
— | — | — | — | — |
17,000,000
SEK
|
— | — | — | — | — |