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 |
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 |
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 |
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 |
2021-01-01 to 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 |
2021-01-01 to 2021-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||
| Equity | — |
7 184,1
SEK
|
— | — |
3 867,3
SEK
|
— |
219,000,000
SEK
|
— |
1,000,000
SEK
|
1,002,000,000
SEK
|
71,840,000,000
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
|
— |
3 222,3
SEK
|
2,982,000,000
SEK
|
3 194,6
SEK
|
— | — |
6 218,7
SEK
|
6 218,9
SEK
|
2,000,000
SEK
|
1,002,000,000
SEK
|
— |
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||
| Profit (loss) |
5,437,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
5,764,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income |
445,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
3,381,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
4,992,000,000
SEK
|
— |
4,990,000,000
SEK
|
576,000,000
SEK
|
— |
2,000,000
SEK
|
— |
5,566,000,000
SEK
|
— | — | — | — | — |
3,298,000,000
SEK
|
9,145,000,000
SEK
|
5,846,000,000
SEK
|
1,000,000
SEK
|
— | — | — | — | — | — |
9,144,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
2,819,000,000
SEK
|
— |
2,819,000,000
SEK
|
— | — | — | — |
2,819,000,000
SEK
|
— | — | — | — | — | — |
2,290,000,000
SEK
|
2,290,000,000
SEK
|
— | — | — | — | — | — | — |
2,290,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
479,000,000
SEK
|
479,000,000
SEK
|
— | — | — | — |
479,000,000
SEK
|
| Increase (decrease) through share-based payment transactions, equity |
94,000,000
SEK
|
— |
94,000,000
SEK
|
— | — | — | — |
94,000,000
SEK
|
— | — | — | — | — | — |
53,000,000
SEK
|
53,000,000
SEK
|
— | — | — | — | — | — | — |
53,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |