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 |
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 |
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 |
1 597
SEK
|
— | — | — |
4,000,000
SEK
|
946,000,000
SEK
|
646,000,000
SEK
|
4,000,000
SEK
|
3,000,000
SEK
|
1 593
SEK
|
— | — | — |
79 8
SEK
|
— |
1 751
SEK
|
— |
1 747
SEK
|
946,000,000
SEK
|
1,000,000
SEK
|
4,000,000
SEK
|
4,000,000
SEK
|
— | — |
642,000,000
SEK
|
3,000,000
SEK
|
1 590
SEK
|
4,000,000
SEK
|
2,000,000
SEK
|
946,000,000
SEK
|
1 593
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||
| Profit (loss) | — |
17,000,000
SEK
|
17,000,000
SEK
|
0
SEK
|
— | — | — | — | — | — |
17,000,000
SEK
|
— |
0
SEK
|
— |
24 1
SEK
|
— | — | — | — | — | — | — |
24 1
SEK
|
241,000,000
SEK
|
— | — | — | — | — | — | — |
| Comprehensive income | — |
19,000,000
SEK
|
17,000,000
SEK
|
0
SEK
|
— | — | — | — | — | — |
19,000,000
SEK
|
2,000,000
SEK
|
0
SEK
|
— |
24 2
SEK
|
— |
1,000,000
SEK
|
— | — | — | — | — |
242,000,000
SEK
|
241,000,000
SEK
|
— | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — |
112,000,000
SEK
|
112,000,000
SEK
|
–
SEK
|
— | — | — | — | — | — |
11 2
SEK
|
— |
–
SEK
|
— |
1 07
SEK
|
— | — | — | — | — | — | — |
1 07
SEK
|
1 07
SEK
|
— | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity | — |
24,000,000
SEK
|
2 4
SEK
|
–
SEK
|
— | — | — | — | — | — |
24,000,000
SEK
|
— |
–
SEK
|
— |
61,000,000
SEK
|
— | — | — | — | — | — | — |
61,000,000
SEK
|
61,000,000
SEK
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
41,000,000
SEK
|
41,000,000
SEK
|
–
SEK
|
— | — | — | — | — | — |
41,000,000
SEK
|
— |
–
SEK
|
— |
83,000,000
SEK
|
— | — | — | — | — | — | — |
83,000,000
SEK
|
83,000,000
SEK
|
— | — | — | — | — | — | — |