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 |
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 |
2022-01-01 to 2022-12-31 |
2021-01-01 to 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 |
2021-01-01 to 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||
| Equity |
12 773
SEK
|
— | — | — | — | — |
844,000,000
SEK
|
14,000,000
SEK
|
11 186
SEK
|
729,000,000
SEK
|
12 759
SEK
|
— | — |
9 239
SEK
|
325,000,000
SEK
|
— | — |
10 303
SEK
|
10 292
SEK
|
11,000,000
SEK
|
— |
728,000,000
SEK
|
— | — |
7 776
SEK
|
10,000,000
SEK
|
8 624
SEK
|
727,000,000
SEK
|
121,000,000
SEK
|
8 634
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||
| Profit (loss) | — |
–
SEK
|
–
SEK
|
2 681
SEK
|
2 682
SEK
|
1,000,000
SEK
|
— | — | — | — | — |
2 682
SEK
|
2,000,000
SEK
|
— | — |
–
SEK
|
2 095
SEK
|
— | — | — |
–
SEK
|
— |
2 097
SEK
|
2 095
SEK
|
— | — | — | — | — | — |
| Other comprehensive income | — | — | — |
627,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
247,000,000
SEK
|
— | — | — | — | — | — | — |
| Comprehensive income | — |
–
SEK
|
519,000,000
SEK
|
3 308
SEK
|
2 790
SEK
|
1,000,000
SEK
|
— | — | — | — | — |
3 309
SEK
|
2,000,000
SEK
|
— | — |
204,000,000
SEK
|
2 342
SEK
|
— | — | — |
–
SEK
|
— |
2 344
SEK
|
2 138
SEK
|
— | — | — | — | — | — |
| Issue of equity | — |
1,000,000
SEK
|
–
SEK
|
11,000,000
SEK
|
10,000,000
SEK
|
–
SEK
|
— | — | — | — | — |
11,000,000
SEK
|
–
SEK
|
— | — |
–
SEK
|
48,000,000
SEK
|
— | — | — |
1,000,000
SEK
|
— |
48,000,000
SEK
|
47,000,000
SEK
|
— | — | — | — | — | — |
| Dividends recognised as distributions to owners | — |
–
SEK
|
–
SEK
|
837,000,000
SEK
|
837,000,000
SEK
|
–
SEK
|
— | — | — | — | — |
837,000,000
SEK
|
–
SEK
|
— | — |
–
SEK
|
655,000,000
SEK
|
— | — | — |
–
SEK
|
— |
655,000,000
SEK
|
655,000,000
SEK
|
— | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — |
–
SEK
|
–
SEK
|
0
SEK
|
4,000,000
SEK
|
4,000,000
SEK
|
— | — | — | — | — |
4,000,000
SEK
|
–
SEK
|
— | — |
–
SEK
|
–
SEK
|
— | — | — |
–
SEK
|
— |
–
SEK
|
–
SEK
|
— | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — |
–
SEK
|
–
SEK
|
0
SEK
|
0
SEK
|
0
SEK
|
— | — | — | — | — |
0
SEK
|
1,000,000
SEK
|
— | — |
–
SEK
|
–
SEK
|
— | — | — |
–
SEK
|
— |
1,000,000
SEK
|
–
SEK
|
— | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
–
SEK
|
–
SEK
|
32,000,000
SEK
|
32,000,000
SEK
|
–
SEK
|
— | — | — | — | — |
32,000,000
SEK
|
–
SEK
|
— | — |
–
SEK
|
13,000,000
SEK
|
— | — | — |
–
SEK
|
— |
13,000,000
SEK
|
13,000,000
SEK
|
— | — | — | — | — | — |