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 |
As at 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 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 |
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 |
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 | — |
589,000,000
SEK
|
— |
1 786,1
SEK
|
149,000,000
SEK
|
— | — |
1 815,9
SEK
|
— |
142,000,000
SEK
|
1,939,000,000
SEK
|
— | — | — | — |
217,000,000
SEK
|
1 815,9
SEK
|
1 657,9
SEK
|
142,000,000
SEK
|
— |
1 480,2
SEK
|
4,000,000
SEK
|
3,496,000,000
SEK
|
1 816,0
SEK
|
142,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||
| Profit (loss) |
1,283,000,000
SEK
|
— | — | — | — |
1,283,000,000
SEK
|
— | — | — | — | — | — | — |
1,776,000,000
SEK
|
1,776,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
| Other comprehensive income |
68,000,000
SEK
|
— |
68,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
221,000,000
SEK
|
221,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
1,351,000,000
SEK
|
— |
68,000,000
SEK
|
— | — |
1,283,000,000
SEK
|
0
SEK
|
— |
0
SEK
|
— | — |
0
SEK
|
221,000,000
SEK
|
1,555,000,000
SEK
|
1,776,000,000
SEK
|
— | — | — | — |
0
SEK
|
— | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
0
SEK
|
— | — | — | — | — |
–
SEK
|
— | — | — | — | — | — |
1,000,000
SEK
|
— | — | — | — | — |
1,000,000
SEK
|
— | — | — | — | — |