Statement Of Changes In Equity [Abstract]
| Concept |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
2024-01-01 to 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
As at 2024-12-31 |
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 |
As at 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 2023-12-31 |
As at 2023-12-31 |
As at 2023-12-31 |
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 |
As at 2022-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||
| Equity | — | — |
3 899,8
SEK
|
1,002,000,000
SEK
|
1,000,000
SEK
|
— | — |
7 458,8
SEK
|
— |
2,642,000,000
SEK
|
3 194,6
SEK
|
7 458,9
SEK
|
— |
7 184,1
SEK
|
— | — |
3 867,3
SEK
|
— |
219,000,000
SEK
|
— |
1,000,000
SEK
|
1,002,000,000
SEK
|
7 184,0
SEK
|
3 194,6
SEK
|
6 957,4
SEK
|
795,000,000
SEK
|
1,000,000
SEK
|
3 583,2
SEK
|
1,002,000,000
SEK
|
6 957,5
SEK
|
3 194,6
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — | — | — | — | — | — |
3,543,000,000
SEK
|
— | — | — |
5,437,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — |
2,426,000,000
SEK
|
— | — | — |
445,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
2,423,000,000
SEK
|
5,969,000,000
SEK
|
— | — | — |
3,546,000,000
SEK
|
0
SEK
|
— |
5,969,000,000
SEK
|
— | — | — |
4,992,000,000
SEK
|
— |
4,990,000,000
SEK
|
576,000,000
SEK
|
— |
2,000,000
SEK
|
— |
5,566,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — |
3,170,000,000
SEK
|
— | — | — |
3,170,000,000
SEK
|
— | — |
3,170,000,000
SEK
|
— | — | — |
2,819,000,000
SEK
|
— |
2,819,000,000
SEK
|
— | — | — | — |
2,819,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
51,000,000
SEK
|
— | — | — |
51,000,000
SEK
|
— | — |
51,000,000
SEK
|
— | — | — |
94,000,000
SEK
|
— |
94,000,000
SEK
|
— | — | — | — |
94,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |