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 |
2022-01-01 to 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 |
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 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||
| Equity |
7 936
SEK
|
— | — | — | — |
40,000,000
SEK
|
4 218
SEK
|
4,000,000
SEK
|
155,000,000
SEK
|
3 518
SEK
|
— | — | — |
3 281
SEK
|
3 518
SEK
|
6 832
SEK
|
13,000,000
SEK
|
— | — |
16,000,000
SEK
|
4,000,000
SEK
|
— | — | — |
2 418
SEK
|
21,000,000
SEK
|
3 518
SEK
|
4,000,000
SEK
|
85,000,000
SEK
|
5 876
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||
| Profit (loss) | — |
–
SEK
|
1 283
SEK
|
1 267
SEK
|
16,000,000
SEK
|
— | — | — | — | — |
–
SEK
|
–
SEK
|
10,000,000
SEK
|
— | — | — | — |
–
SEK
|
–
SEK
|
— | — |
–
SEK
|
1 138
SEK
|
1 148
SEK
|
— | — | — | — | — | — |
| Other comprehensive income | — |
–
SEK
|
467,000,000
SEK
|
325,000,000
SEK
|
–
SEK
|
— | — | — | — | — |
142,000,000
SEK
|
–
SEK
|
–
SEK
|
— | — | — | — |
98,000,000
SEK
|
–
SEK
|
— | — |
–
SEK
|
223,000,000
SEK
|
125,000,000
SEK
|
— | — | — | — | — | — |
| Comprehensive income | — |
-
SEK
|
1 750
SEK
|
1 592
SEK
|
16,000,000
SEK
|
— | — | — | — | — |
142,000,000
SEK
|
-
SEK
|
10,000,000
SEK
|
— | — | — | — |
98,000,000
SEK
|
-
SEK
|
— | — |
-
SEK
|
1 361
SEK
|
1 273
SEK
|
— | — | — | — | — | — |
| Dividends recognised as distributions to owners | — |
–
SEK
|
610,000,000
SEK
|
610,000,000
SEK
|
–
SEK
|
— | — | — | — | — |
–
SEK
|
–
SEK
|
–
SEK
|
— | — | — | — |
–
SEK
|
–
SEK
|
— | — |
–
SEK
|
507,000,000
SEK
|
507,000,000
SEK
|
— | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — |
–
SEK
|
–
SEK
|
7,000,000
SEK
|
7,000,000
SEK
|
— | — | — | — | — |
–
SEK
|
–
SEK
|
7,000,000
SEK
|
— | — | — | — |
–
SEK
|
–
SEK
|
— | — |
–
SEK
|
–
SEK
|
7,000,000
SEK
|
— | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
–
SEK
|
37,000,000
SEK
|
37,000,000
SEK
|
–
SEK
|
— | — | — | — | — |
–
SEK
|
–
SEK
|
–
SEK
|
— | — | — | — |
–
SEK
|
–
SEK
|
— | — |
–
SEK
|
35,000,000
SEK
|
35,000,000
SEK
|
— | — | — | — | — | — |