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 |
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 |
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 |
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 |
7 984
SEK
|
— | — | — |
5,000,000
SEK
|
4 569
SEK
|
2 563
SEK
|
434,000,000
SEK
|
413,000,000
SEK
|
7 979
SEK
|
— | — | — | — |
3 245
SEK
|
— |
8 322
SEK
|
— |
70,000,000
SEK
|
— |
8 318
SEK
|
— |
4 569
SEK
|
434,000,000
SEK
|
5,000,000
SEK
|
— | — |
2 996
SEK
|
4,000,000
SEK
|
7 918
SEK
|
434,000,000
SEK
|
80,000,000
SEK
|
4 569
SEK
|
7 923
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — |
303,000,000
SEK
|
303,000,000
SEK
|
— | — | — | — | — | — |
303,000,000
SEK
|
— | — | — | — |
808,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
808,000,000
SEK
|
808,000,000
SEK
|
— | — | — | — | — | — | — |
| Other comprehensive income | — | — |
344,000,000
SEK
|
— | — | — | — | — | — | — |
344,000,000
SEK
|
— |
344,000,000
SEK
|
— | — |
150,000,000
SEK
|
— | — | — |
150,000,000
SEK
|
— | — | — | — | — |
150,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Comprehensive income | — |
0
SEK
|
41,000,000
SEK
|
303,000,000
SEK
|
— | — | — | — | — | — |
41,000,000
SEK
|
0
SEK
|
344,000,000
SEK
|
0
SEK
|
— |
958,000,000
SEK
|
— |
0
SEK
|
— |
150,000,000
SEK
|
— |
0
SEK
|
— | — | — |
958,000,000
SEK
|
808,000,000
SEK
|
— | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — |
375,000,000
SEK
|
375,000,000
SEK
|
— | — | — | — | — | — |
375,000,000
SEK
|
— | — | — | — |
563,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
563,000,000
SEK
|
563,000,000
SEK
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — |
4,000,000
SEK
|
4,000,000
SEK
|
— | — | — | — | — | — |
4,000,000
SEK
|
— | — | — | — |
4,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
4,000,000
SEK
|
4,000,000
SEK
|
— | — | — | — | — | — | — |