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 |
2022-01-01 to 2022-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
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 |
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 |
As at 2020-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||
| Equity |
1 243,4
SEK
|
— | — | — | — |
83,000,000
SEK
|
268,000,000
SEK
|
1 007,3
SEK
|
2,005,000,000
SEK
|
6,000,000
SEK
|
1 216,7
SEK
|
— | — | — |
471,000,000
SEK
|
8,000,000
SEK
|
— |
9,685,000,000
SEK
|
— |
9,473,000,000
SEK
|
8,988,000,000
SEK
|
— |
212,000,000
SEK
|
5,000,000
SEK
|
— | — |
24,000,000
SEK
|
197,000,000
SEK
|
2,863,000,000
SEK
|
6,000,000
SEK
|
105,000,000
SEK
|
2,938,000,000
SEK
|
3,060,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||
| Profit (loss) | — | — |
1,491,000,000
SEK
|
1,444,000,000
SEK
|
47,000,000
SEK
|
— | — | — | — | — | — |
1,444,000,000
SEK
|
— |
1,000,000
SEK
|
— | — |
447,000,000
SEK
|
— | — | — | — | — | — | — |
448,000,000
SEK
|
447,000,000
SEK
|
— | — | — | — | — | — | — |
| Other comprehensive income | — | — |
82,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
128,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Comprehensive income | — | — |
1,574,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
576,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Issue of equity | — |
0
SEK
|
1,085,000,000
SEK
|
— | — | — | — | — | — | — | — |
1,085,000,000
SEK
|
1,085,000,000
SEK
|
— | — | — |
6,338,000,000
SEK
|
— |
6,335,000,000
SEK
|
— | — |
3,000,000
SEK
|
— | — |
6,338,000,000
SEK
|
— | — | — | — | — | — | — | — |