Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
2020-01-01 to 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 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||
| Equity | — |
3 119
SEK
|
2 272
SEK
|
— |
5 650
SEK
|
— |
5 650
SEK
|
-
SEK
|
— |
18 0
SEK
|
79,000,000
SEK
|
— | — | — | — |
2 834
SEK
|
0
SEK
|
2 262
SEK
|
5 178
SEK
|
79,000,000
SEK
|
— |
3,000,000
SEK
|
— | — |
5 178
SEK
|
— | — | — |
5 027
SEK
|
-
SEK
|
322,000,000
SEK
|
2 260
SEK
|
5 027
SEK
|
2 366
SEK
|
79,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||
| Profit (loss) |
0
SEK
|
— | — |
5 37
SEK
|
— | — | — | — | — | — | — | — |
537,000,000
SEK
|
5 37
SEK
|
596,000,000
SEK
|
— | — | — | — | — |
596,000,000
SEK
|
— | — | — | — | — |
0
SEK
|
59 6
SEK
|
— | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — | — | — | — |
18 2
SEK
|
— |
3 15
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
0
SEK
|
— | — |
719,000,000
SEK
|
— |
177,000,000
SEK
|
— | — |
-
SEK
|
— | — |
-
SEK
|
7 19
SEK
|
542,000,000
SEK
|
281,000,000
SEK
|
— | — | — | — | — |
600,000,000
SEK
|
— |
-
SEK
|
-
SEK
|
— |
319,000,000
SEK
|
0
SEK
|
281,000,000
SEK
|
— | — | — | — | — | — | — |
| Issue of equity |
-
SEK
|
— | — |
10,000,000
SEK
|
— | — | — | — |
0
SEK
|
— | — |
10,000,000
SEK
|
10,000,000
SEK
|
— |
2,000,000
SEK
|
— | — | — | — | — | — | — |
2,000,000
SEK
|
0
SEK
|
— | — |
-
SEK
|
2,000,000
SEK
|
— | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
-
SEK
|
— | — |
26 0
SEK
|
— | — | — | — | — | — | — | — |
260,000,000
SEK
|
26 0
SEK
|
13 4
SEK
|
— | — | — | — | — |
13 4
SEK
|
— | — | — | — | — |
-
SEK
|
13 4
SEK
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
-
SEK
|
— | — |
3,000,000
SEK
|
— | — | — | — | — | — | — | — |
3,000,000
SEK
|
3,000,000
SEK
|
2,000,000
SEK
|
— | — | — | — | — |
2,000,000
SEK
|
— | — | — | — | — |
-
SEK
|
2,000,000
SEK
|
— | — | — | — | — | — | — |