Statement Of Changes In Equity [Abstract]
| Concept |
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 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 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 |
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 | — |
3 280
SEK
|
3 518
SEK
|
6 832
SEK
|
— |
17,000,000
SEK
|
— |
13,000,000
SEK
|
4,000,000
SEK
|
— | — | — | — |
2 418
SEK
|
21,000,000
SEK
|
3 518
SEK
|
4,000,000
SEK
|
— |
85,000,000
SEK
|
— | — |
5 876
SEK
|
— | — |
9,000,000
SEK
|
65,000,000
SEK
|
3 518
SEK
|
5 596
SEK
|
2 000
SEK
|
4,000,000
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||
| Profit (loss) |
10,000,000
SEK
|
— | — | — |
–
SEK
|
— |
–
SEK
|
— | — |
–
SEK
|
1 138
SEK
|
1 148
SEK
|
997,000,000
SEK
|
— | — | — | — |
1 002
SEK
|
— |
–
SEK
|
–
SEK
|
— |
–
SEK
|
5,000,000
SEK
|
— | — | — | — | — | — |
| Other comprehensive income |
–
SEK
|
— | — | — |
98,000,000
SEK
|
— |
–
SEK
|
— | — |
–
SEK
|
223,000,000
SEK
|
125,000,000
SEK
|
142,000,000
SEK
|
— | — | — | — |
8,000,000
SEK
|
— |
–
SEK
|
–
SEK
|
— |
150,000,000
SEK
|
–
SEK
|
— | — | — | — | — | — |
| Comprehensive income |
10,000,000
SEK
|
— | — | — |
98,000,000
SEK
|
— |
–
SEK
|
— | — |
–
SEK
|
1 361
SEK
|
1 273
SEK
|
855,000,000
SEK
|
— | — | — | — |
1 010
SEK
|
— |
–
SEK
|
–
SEK
|
— |
150,000,000
SEK
|
5,000,000
SEK
|
— | — | — | — | — | — |
| Dividends recognised as distributions to owners |
–
SEK
|
— | — | — |
–
SEK
|
— |
–
SEK
|
— | — |
–
SEK
|
507,000,000
SEK
|
507,000,000
SEK
|
457,000,000
SEK
|
— | — | — | — |
457,000,000
SEK
|
— |
–
SEK
|
–
SEK
|
— |
–
SEK
|
–
SEK
|
— | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity |
7,000,000
SEK
|
— | — | — |
–
SEK
|
— |
–
SEK
|
— | — |
–
SEK
|
–
SEK
|
7,000,000
SEK
|
–
SEK
|
— | — | — | — |
17,000,000
SEK
|
— |
–
SEK
|
–
SEK
|
— |
–
SEK
|
17,000,000
SEK
|
— | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
–
SEK
|
— | — | — |
–
SEK
|
— |
–
SEK
|
— | — |
–
SEK
|
35,000,000
SEK
|
35,000,000
SEK
|
17,000,000
SEK
|
— | — | — | — |
17,000,000
SEK
|
— |
–
SEK
|
–
SEK
|
— |
–
SEK
|
–
SEK
|
— | — | — | — | — | — |