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 |
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 |
2021-01-01 to 2021-12-31 |
As at 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 |
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 |
3 639,1
SEK
|
— | — | — | — |
1,659,000,000
SEK
|
351,000,000
SEK
|
2 868,2
SEK
|
1,255,000,000
SEK
|
3 604,0
SEK
|
4,444,000,000
SEK
|
— | — |
2 162,1
SEK
|
1,258,000,000
SEK
|
4,444,000,000
SEK
|
— | — |
2 854,0
SEK
|
2 857,8
SEK
|
38,000,000
SEK
|
1,255,000,000
SEK
|
— | — |
1 899,2
SEK
|
138,000,000
SEK
|
2 517,9
SEK
|
1,255,000,000
SEK
|
4,444,000,000
SEK
|
488,000,000
SEK
|
2 504,1
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||
| Profit (loss) | — | — |
9,729,000,000
SEK
|
9,594,000,000
SEK
|
135,000,000
SEK
|
— | — | — | — | — | — |
9,594,000,000
SEK
|
55,000,000
SEK
|
— | — | — | — |
5,682,000,000
SEK
|
— | — | — | — |
5,737,000,000
SEK
|
5,682,000,000
SEK
|
— | — | — | — | — | — | — |
| Other comprehensive income | — |
401,000,000
SEK
|
401,000,000
SEK
|
— | — | — | — | — | — | — | — |
401,000,000
SEK
|
— | — | — | — |
770,000,000
SEK
|
770,000,000
SEK
|
— | — | — | — |
770,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Comprehensive income | — | — |
1 013,0
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
6,507,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — |
2,109,000,000
SEK
|
2,109,000,000
SEK
|
— | — | — | — | — | — | — |
2,109,000,000
SEK
|
— | — | — | — | — |
1,808,000,000
SEK
|
— | — | — | — |
1,808,000,000
SEK
|
1,808,000,000
SEK
|
— | — | — | — | — | — | — |