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 |
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 |
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 |
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 |
6 751
SEK
|
— | — | — | — |
-
SEK
|
3 877
SEK
|
79,000,000
SEK
|
52 3
SEK
|
6 751
SEK
|
2 272
SEK
|
— | — | — | — |
3 119
SEK
|
2 272
SEK
|
— |
5 650
SEK
|
18 0
SEK
|
— |
5 650
SEK
|
-
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
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — |
9 74
SEK
|
9 74
SEK
|
-
SEK
|
— | — | — | — | — | — |
9 74
SEK
|
— | — |
0
SEK
|
— | — |
537,000,000
SEK
|
— | — | — | — | — | — | — | — |
537,000,000
SEK
|
5 37
SEK
|
— | — | — | — | — | — | — |
| Other comprehensive income | — |
-
SEK
|
4 07
SEK
|
64,000,000
SEK
|
-
SEK
|
— | — | — | — | — | — |
407,000,000
SEK
|
343,000,000
SEK
|
-
SEK
|
0
SEK
|
— | — |
182,000,000
SEK
|
— | — |
177,000,000
SEK
|
— | — |
-
SEK
|
— |
-
SEK
|
18 2
SEK
|
5,000,000
SEK
|
— | — | — | — | — | — | — |
| Comprehensive income | — |
-
SEK
|
1 381
SEK
|
1 038
SEK
|
-
SEK
|
— | — | — | — | — | — |
1 381
SEK
|
343,000,000
SEK
|
-
SEK
|
0
SEK
|
— | — |
719,000,000
SEK
|
— | — |
177,000,000
SEK
|
— | — |
-
SEK
|
— |
-
SEK
|
719,000,000
SEK
|
542,000,000
SEK
|
— | — | — | — | — | — | — |
| Issue of equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
-
SEK
|
— | — |
10,000,000
SEK
|
— | — | — | — | — |
0
SEK
|
— |
10,000,000
SEK
|
10,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — |
306,000,000
SEK
|
306,000,000
SEK
|
-
SEK
|
— | — | — | — | — | — |
306,000,000
SEK
|
— | — |
-
SEK
|
— | — |
260,000,000
SEK
|
— | — | — | — | — | — | — | — |
260,000,000
SEK
|
26 0
SEK
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — |
26,000,000
SEK
|
26,000,000
SEK
|
-
SEK
|
— | — | — | — | — | — |
26,000,000
SEK
|
— | — |
-
SEK
|
— | — |
3,000,000
SEK
|
— | — | — | — | — | — | — | — |
3,000,000
SEK
|
3,000,000
SEK
|
— | — | — | — | — | — | — |