Statement Of Changes In Equity [Abstract]
| Concept |
2021-01-01 to 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 |
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 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||
| Equity | — |
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
|
— | — |
7 157
SEK
|
13,000,000
SEK
|
397,000,000
SEK
|
7 170
SEK
|
6 518
SEK
|
242,000,000
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||
| Profit (loss) |
2,000,000
SEK
|
— | — |
2 095
SEK
|
— | — | — | — | — |
2 097
SEK
|
2 095
SEK
|
1 669
SEK
|
— | — | — | — |
1 669
SEK
|
— | — | — |
0
SEK
|
1 669
SEK
|
— | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — |
247,000,000
SEK
|
— |
289,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — | — | — | — | — | — | — | — | — |
2 344
SEK
|
— |
1 380
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Issue of equity | — | — | — |
48,000,000
SEK
|
— | — | — |
1,000,000
SEK
|
— |
48,000,000
SEK
|
47,000,000
SEK
|
87,000,000
SEK
|
— | — | — | — |
87,000,000
SEK
|
— |
0
SEK
|
— | — |
87,000,000
SEK
|
— | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — | — |
655,000,000
SEK
|
— | — | — | — | — |
655,000,000
SEK
|
655,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity |
1,000,000
SEK
|
— | — | — | — | — | — | — | — |
1,000,000
SEK
|
— |
3,000,000
SEK
|
— | — | — | — | — | — | — | — |
3,000,000
SEK
|
— | — | — | — | — | — | — |