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 |
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 |
As at 2022-12-31 |
2022-01-01 to 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 |
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 |
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 |
15 901
SEK
|
— | — | — | — | — |
0
SEK
|
14 606
SEK
|
251,000,000
SEK
|
485,000,000
SEK
|
15 901
SEK
|
0
SEK
|
— |
559,000,000
SEK
|
— | — | — |
11 616
SEK
|
— |
0
SEK
|
— |
11 761
SEK
|
-
SEK
|
— |
11 663
SEK
|
— |
47,000,000
SEK
|
0
SEK
|
97,000,000
SEK
|
— | — | — |
10 298
SEK
|
50,000,000
SEK
|
-
SEK
|
0
SEK
|
10 317
SEK
|
0
SEK
|
20,000,000
SEK
|
10 368
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — |
-
SEK
|
1 483
SEK
|
1 470
SEK
|
12,000,000
SEK
|
-
SEK
|
— | — | — | — | — | — |
1 470
SEK
|
— |
-
SEK
|
-
SEK
|
23,000,000
SEK
|
— |
-
SEK
|
— |
1 205
SEK
|
— | — |
-
SEK
|
— |
-
SEK
|
— | — | — |
-
SEK
|
1 228
SEK
|
1 205
SEK
|
— | — | — | — | — | — | — | — |
| Other comprehensive income | — |
-
SEK
|
1 498
SEK
|
529,000,000
SEK
|
2,000,000
SEK
|
530,000,000
SEK
|
— | — | — | — | — | — |
1 496
SEK
|
— |
438,000,000
SEK
|
-
SEK
|
24,000,000
SEK
|
— |
-
SEK
|
— |
192,000,000
SEK
|
— | — |
12 6
SEK
|
— |
-
SEK
|
— | — | — |
-
SEK
|
216,000,000
SEK
|
318,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Comprehensive income | — |
-
SEK
|
2 981
SEK
|
2 000
SEK
|
14,000,000
SEK
|
530,000,000
SEK
|
— | — | — | — | — | — |
2 967
SEK
|
— |
438,000,000
SEK
|
-
SEK
|
47,000,000
SEK
|
— |
-
SEK
|
— |
1 397
SEK
|
— | — |
12 6
SEK
|
— |
-
SEK
|
— | — | — |
-
SEK
|
1 445
SEK
|
1 523
SEK
|
— | — | — | — | — | — | — | — |
| Issue of equity | — |
251,000,000
SEK
|
2 51
SEK
|
-
SEK
|
-
SEK
|
-
SEK
|
— | — | — | — | — | — |
251,000,000
SEK
|
— |
-
SEK
|
-
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase through other contributions by owners, equity | — |
-
SEK
|
1 149
SEK
|
1 149
SEK
|
-
SEK
|
-
SEK
|
— | — | — | — | — | — |
1 149
SEK
|
— |
-
SEK
|
-
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — |
-
SEK
|
12 3
SEK
|
1 23
SEK
|
0
SEK
|
-
SEK
|
— | — | — | — | — | — |
1 2 3
SEK
|
— |
-
SEK
|
-
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — |
-
SEK
|
14 5
SEK
|
36,000,000
SEK
|
1 09
SEK
|
-
SEK
|
— | — | — | — | — | — |
36,000,000
SEK
|
— |
-
SEK
|
-
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |