Statement Of Changes In Equity [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
As at 2023-12-31 |
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 |
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 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||
| Equity | — |
7 237
SEK
|
— |
4 335
SEK
|
— | — | — |
79,000,000
SEK
|
5 51
SEK
|
7 237
SEK
|
— |
2 272
SEK
|
6 751
SEK
|
— | — | — |
3 877
SEK
|
79,000,000
SEK
|
523,000,000
SEK
|
6 751
SEK
|
2 272
SEK
|
— | — | — |
3 119
SEK
|
2 272
SEK
|
5 650
SEK
|
18 0
SEK
|
79,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||
| Profit (loss) |
849,000,000
SEK
|
— |
849,000,000
SEK
|
— |
849,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
9 74
SEK
|
9 74
SEK
|
— | — | — | — | — |
9 74
SEK
|
— | — | — | — | — | — | — |
| Other comprehensive income |
10,000,000
SEK
|
— |
10,000,000
SEK
|
— |
18,000,000
SEK
|
28,000,000
SEK
|
-
SEK
|
— | — | — |
-
SEK
|
— | — |
-
SEK
|
407,000,000
SEK
|
64,000,000
SEK
|
— | — | — | — | — |
407,000,000
SEK
|
343,000,000
SEK
|
-
SEK
|
— | — | — | — | — |
| Comprehensive income |
859,000,000
SEK
|
— |
859,000,000
SEK
|
— |
831,000,000
SEK
|
28,000,000
SEK
|
-
SEK
|
— | — | — |
-
SEK
|
— | — |
-
SEK
|
1 381
SEK
|
1 038
SEK
|
— | — | — | — | — |
1 381
SEK
|
343,000,000
SEK
|
-
SEK
|
— | — | — | — | — |
| Dividends recognised as distributions to owners | — | — |
399,000,000
SEK
|
— |
399,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
306,000,000
SEK
|
— | — | — | — | — |
306,000,000
SEK
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — |
26,000,000
SEK
|
— |
26,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
26,000,000
SEK
|
— | — | — | — | — |
26,000,000
SEK
|
— | — | — | — | — | — | — |