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 |
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 |
2022-01-01 to 2022-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
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 |
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 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 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||
| Equity |
5 744
SEK
|
— | — | — |
1 106
SEK
|
— |
2 647
SEK
|
30,000,000
SEK
|
373,000,000
SEK
|
4 638
SEK
|
2 275
SEK
|
— |
687,000,000
SEK
|
— |
1 924
SEK
|
— |
2 275
SEK
|
— |
4 941
SEK
|
473,000,000
SEK
|
— |
1 106
SEK
|
— |
3 835
SEK
|
79,000,000
SEK
|
30,000,000
SEK
|
— | — |
2 128
SEK
|
30,000,000
SEK
|
4 052
SEK
|
1 106
SEK
|
443,000,000
SEK
|
2 275
SEK
|
62,000,000
SEK
|
5 158
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||
| Profit (loss) | — |
801,000,000
SEK
|
706,000,000
SEK
|
95,000,000
SEK
|
— | — | — | — | — | — | — |
706,000,000
SEK
|
— | — | — | — | — |
207,000,000
SEK
|
— | — |
90,000,000
SEK
|
— | — | — | — | — |
117,000,000
SEK
|
207,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Other comprehensive income | — |
93,000,000
SEK
|
13,000,000
SEK
|
— | — |
214,000,000
SEK
|
— | — | — | — | — |
93,000,000
SEK
|
— |
294,000,000
SEK
|
— |
30,000,000
SEK
|
— |
10,000,000
SEK
|
— | — | — | — |
17,000,000
SEK
|
— | — | — |
10,000,000
SEK
|
3,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Comprehensive income | — |
894,000,000
SEK
|
719,000,000
SEK
|
95,000,000
SEK
|
— |
214,000,000
SEK
|
— | — | — | — | — |
799,000,000
SEK
|
— |
294,000,000
SEK
|
— |
30,000,000
SEK
|
— |
217,000,000
SEK
|
— | — |
90,000,000
SEK
|
— |
17,000,000
SEK
|
— | — | — |
127,000,000
SEK
|
204,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
4,000,000
SEK
|
4,000,000
SEK
|
— | — | — | — | — | — | — | — |
4,000,000
SEK
|
— | — | — | — | — |
0
SEK
|
— | — |
0
SEK
|
— | — | — | — | — |
0
SEK
|
0
SEK
|
— | — | — | — | — | — | — | — |