Statement Of Changes In Equity [Abstract]
| Concept |
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 |
As at 2022-12-31 |
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 |
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 |
31 262,0
SEK
|
29 577,5
SEK
|
1 056,4
SEK
|
— | — |
6,281,000,000
SEK
|
31 066,0
SEK
|
29 381,5
SEK
|
— |
6,281,000,000
SEK
|
1 056,4
SEK
|
— |
28 616,5
SEK
|
1 056,4
SEK
|
26 932,0
SEK
|
6,281,000,000
SEK
|
| Changes in equity [abstract] | ||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||
| Profit (loss) | — | — | — |
7,220,000,000
SEK
|
7,220,000,000
SEK
|
— | — | — |
2 955,3
SEK
|
— | — |
2 955,3
SEK
|
— | — | — | — |
| Other comprehensive income | — | — | — |
–
SEK
|
–
SEK
|
— | — | — |
–
SEK
|
— | — |
–
SEK
|
— | — | — | — |
| Comprehensive income | — | — | — |
7,220,000,000
SEK
|
7,220,000,000
SEK
|
— | — | — |
2 955,3
SEK
|
— | — |
2 955,3
SEK
|
— | — | — | — |