Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
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 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 | — |
81,819,000,000
SEK
|
371,000,000
SEK
|
10,000,000
SEK
|
— | — | — |
15,206,000,000
SEK
|
9,675,000,000
SEK
|
107,080,000,000
SEK
|
— |
91,644,000,000
SEK
|
— |
72,128,000,000
SEK
|
— |
9,455,000,000
SEK
|
— |
16,000,000
SEK
|
371,000,000
SEK
|
9,675,000,000
SEK
|
86,026,000,000
SEK
|
12,133,000,000
SEK
|
12,000,000
SEK
|
63,835,000,000
SEK
|
371,000,000
SEK
|
9,675,000,000
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||
| Profit (loss) | — | — | — | — |
15,639,000,000
SEK
|
18,000,000
SEK
|
15,621,000,000
SEK
|
— | — | — |
13,639,000,000
SEK
|
— | — | — |
7,000,000
SEK
|
— |
13,633,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Other comprehensive income |
5,751,000,000
SEK
|
— | — | — |
70,000,000
SEK
|
6,000,000
SEK
|
5,814,000,000
SEK
|
— | — | — |
2,685,000,000
SEK
|
— |
2,679,000,000
SEK
|
— |
5,000,000
SEK
|
— |
1,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Comprehensive income |
5,751,000,000
SEK
|
— | — | — |
15,708,000,000
SEK
|
24,000,000
SEK
|
21,435,000,000
SEK
|
— | — | — |
10,954,000,000
SEK
|
— |
2,679,000,000
SEK
|
— |
2,000,000
SEK
|
— |
13,632,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — | — | — |
5,998,000,000
SEK
|
1,000,000
SEK
|
5,999,000,000
SEK
|
— | — | — |
5,332,000,000
SEK
|
— | — | — |
–
SEK
|
— |
5,332,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — | — | — | — |
–
SEK
|
18,000,000
SEK
|
18,000,000
SEK
|
— | — | — |
2,000,000
SEK
|
— | — | — |
2,000,000
SEK
|
— |
–
SEK
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — | — |
19,000,000
SEK
|
–
SEK
|
19,000,000
SEK
|
— | — | — |
7,000,000
SEK
|
— | — | — |
–
SEK
|
— |
7,000,000
SEK
|
— | — | — | — | — | — | — | — | — |