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 |
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 |
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 |
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 |
As at 2020-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||
| Equity |
4,750,000,000
SEK
|
— | — | — | — |
337,000,000
SEK
|
1,113,000,000
SEK
|
245,000,000
SEK
|
366,000,000
SEK
|
29,000,000
SEK
|
3,055,000,000
SEK
|
— |
704,000,000
SEK
|
225,000,000
SEK
|
3,055,000,000
SEK
|
— |
4,229,000,000
SEK
|
231,000,000
SEK
|
6,000,000
SEK
|
— |
231,000,000
SEK
|
245,000,000
SEK
|
— | — | — |
60,000,000
SEK
|
46,000,000
SEK
|
4,940,000,000
SEK
|
2,849,000,000
SEK
|
242,000,000
SEK
|
14,000,000
SEK
|
8,045,000,000
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||
| Profit (loss) | — |
0
SEK
|
0
SEK
|
409,000,000
SEK
|
409,000,000
SEK
|
— | — | — | — | — | — |
0
SEK
|
— | — | — |
0
SEK
|
— | — | — |
0
SEK
|
— | — |
0
SEK
|
3,692,000,000
SEK
|
3,692,000,000
SEK
|
— | — | — | — | — | — | — |
| Other comprehensive income | — |
0
SEK
|
112,000,000
SEK
|
112,000,000
SEK
|
0
SEK
|
— | — | — | — | — | — |
0
SEK
|
— | — | — |
211,000,000
SEK
|
— | — | — |
0
SEK
|
— | — |
0
SEK
|
211,000,000
SEK
|
0
SEK
|
— | — | — | — | — | — | — |
| Comprehensive income | — |
0
SEK
|
112,000,000
SEK
|
521,000,000
SEK
|
409,000,000
SEK
|
— | — | — | — | — | — |
0
SEK
|
— | — | — |
211,000,000
SEK
|
— | — | — |
0
SEK
|
— | — |
0
SEK
|
3,903,000,000
SEK
|
3,692,000,000
SEK
|
— | — | — | — | — | — | — |
| Issue of equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
0
SEK
|
— | — | — |
3,000,000
SEK
|
— | — |
206,000,000
SEK
|
209,000,000
SEK
|
0
SEK
|
— | — | — | — | — | — | — |