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 |
As at 2022-12-31 |
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 |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||
| Equity |
2 252
SEK
|
— | — | — |
12,000,000
SEK
|
1 112
SEK
|
3,000,000
SEK
|
1,000,000
SEK
|
2 240
SEK
|
1 126
SEK
|
— | — | — | — |
1 347
SEK
|
1 118
SEK
|
— |
2 467
SEK
|
— |
2 467
SEK
|
— |
1,000,000
SEK
|
3,000,000
SEK
|
0
SEK
|
— | — | — |
998,000,000
SEK
|
0
SEK
|
9 47
SEK
|
1 946
SEK
|
2,000,000
SEK
|
1,000,000
SEK
|
1 946
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||
| Profit (loss) | — |
2 3 3
SEK
|
2 32
SEK
|
1,000,000
SEK
|
— | — | — | — | — | — |
2 3 2
SEK
|
— | — |
0
SEK
|
— | — |
349,000,000
SEK
|
— | — | — | — | — | — | — | — |
349,000,000
SEK
|
349,000,000
SEK
|
— | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — | — | — |
0
SEK
|
— |
0
SEK
|
— | — |
0
SEK
|
— |
0
SEK
|
— | — | — | — | — | — |
0
SEK
|
0
SEK
|
— | — | — | — | — | — | — |
| Comprehensive income | — |
2 3 3
SEK
|
— | — | — | — | — | — | — | — | — |
0
SEK
|
— |
0
SEK
|
— | — |
349,000,000
SEK
|
— |
0
SEK
|
— | — | — | — | — | — |
349,000,000
SEK
|
349,000,000
SEK
|
— | — | — | — | — | — | — |
| Issue of equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
16 6
SEK
|
— | — | — |
0
SEK
|
— | — | — |
16 6
SEK
|
16 6
SEK
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — |
10,000,000
SEK
|
3,000,000
SEK
|
13,000,000
SEK
|
— | — | — | — | — | — |
3,000,000
SEK
|
— | — |
0
SEK
|
— | — |
0
SEK
|
— | — | — | — | — | — | — | — |
0
SEK
|
0
SEK
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
8,000,000
SEK
|
— | — | — | — | — | — | — | — |
8,000,000
SEK
|
— |
8,000,000
SEK
|
— | — | — |
6,000,000
SEK
|
— | — | — | — | — | — | — |
6,000,000
SEK
|
6,000,000
SEK
|
— | — | — | — | — | — | — | — |