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 |
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 |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||
| Equity |
2 186,5
SEK
|
— | — | — |
1 526,2
SEK
|
12,000,000
SEK
|
3,132,000,000
SEK
|
3,459,000,000
SEK
|
— | — |
1 293,0
SEK
|
3,459,000,000
SEK
|
1 717,4
SEK
|
— | — |
773,000,000
SEK
|
12,000,000
SEK
|
— | — | — |
1 007,6
SEK
|
3,459,000,000
SEK
|
12,000,000
SEK
|
539,000,000
SEK
|
1 300,8
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||
| Profit (loss) | — |
–
SEK
|
3,287,000,000
SEK
|
3,287,000,000
SEK
|
— | — | — | — |
–
SEK
|
–
SEK
|
— | — | — |
–
SEK
|
–
SEK
|
— | — |
–
SEK
|
3,053,000,000
SEK
|
3,053,000,000
SEK
|
— | — | — | — | — |
| Other comprehensive income | — |
–
SEK
|
2,632,000,000
SEK
|
273,000,000
SEK
|
— | — | — | — |
2,359,000,000
SEK
|
–
SEK
|
— | — | — |
1,312,000,000
SEK
|
–
SEK
|
— | — |
–
SEK
|
1,464,000,000
SEK
|
152,000,000
SEK
|
— | — | — | — | — |
| Comprehensive income | — |
–
SEK
|
5,919,000,000
SEK
|
3,560,000,000
SEK
|
— | — | — | — |
2,359,000,000
SEK
|
–
SEK
|
— | — | — |
1,312,000,000
SEK
|
–
SEK
|
— | — |
–
SEK
|
4,517,000,000
SEK
|
3,205,000,000
SEK
|
— | — | — | — | — |
| Dividends recognised as distributions to owners | — |
–
SEK
|
1,228,000,000
SEK
|
1,228,000,000
SEK
|
— | — | — | — |
–
SEK
|
–
SEK
|
— | — | — |
–
SEK
|
–
SEK
|
— | — |
–
SEK
|
351,000,000
SEK
|
351,000,000
SEK
|
— | — | — | — | — |