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 |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||
| Equity |
1 280,8
SEK
|
— | — |
8,589,000,000
SEK
|
12,000,000
SEK
|
4,207,000,000
SEK
|
— |
5,609,000,000
SEK
|
4,196,000,000
SEK
|
9,817,000,000
SEK
|
— |
12,000,000
SEK
|
— | — | — |
3,654,000,000
SEK
|
1,026,000,000
SEK
|
12,000,000
SEK
|
4,693,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||
| Profit (loss) | — |
3,468,000,000
SEK
|
3,468,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
2,411,000,000
SEK
|
2,411,000,000
SEK
|
— | — | — | — |
| Other comprehensive income | — |
-
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
-
SEK
|
— | — | — | — | — |
| Comprehensive income | — |
3,468,000,000
SEK
|
3,468,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
2,411,000,000
SEK
|
2,411,000,000
SEK
|
— | — | — | — |
| Issue of equity | — |
9,000,000
SEK
|
— | — | — | — |
9,000,000
SEK
|
— | — | — |
0
SEK
|
— |
3,170,000,000
SEK
|
3,170,000,000
SEK
|
— | — | — | — | — |
| Dividends recognised as distributions to owners | — |
488,000,000
SEK
|
488,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
456,000,000
SEK
|
456,000,000
SEK
|
— | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
2,000,000
SEK
|
— | — | — | — |
2,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — |