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 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
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 |
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 |
As at 2020-12-31 |
As at 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||
| Equity |
10 2 909
SEK
|
— | — | — | — | — |
12 7 15
SEK
|
76 6 57
SEK
|
192,000,000
SEK
|
493,000,000
SEK
|
90 194
SEK
|
12 5 01
SEK
|
— |
351,000,000
SEK
|
— | — | — |
6 6 574
SEK
|
— |
10 72 9
SEK
|
— |
88 567
SEK
|
117,000,000
SEK
|
— |
7 7 606
SEK
|
10 9 61
SEK
|
1,000,000
SEK
|
187,000,000
SEK
|
— | — |
48 06 8
SEK
|
9 6 76
SEK
|
15,000,000
SEK
|
10 72 9
SEK
|
58 2 09
SEK
|
187,000,000
SEK
|
7 8 9
SEK
|
67 8 85
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — |
10 9 89
SEK
|
10 17 5
SEK
|
8 14
SEK
|
— | — | — | — | — | — | — |
10 17 5
SEK
|
— | — | — |
1 076
SEK
|
— | — | — |
1 8 508
SEK
|
— | — | — | — | — | — | — |
19 5 84
SEK
|
18 50 8
SEK
|
— | — | — | — | — | — | — | — |
| Other comprehensive income | — | — |
1 88 6
SEK
|
— |
1 1 57
SEK
|
234,000,000
SEK
|
— | — | — | — | — | — |
728,000,000
SEK
|
— |
494,000,000
SEK
|
— |
271,000,000
SEK
|
— |
103,000,000
SEK
|
— |
890,000,000
SEK
|
— | — |
788,000,000
SEK
|
— | — | — | — |
1 16 2
SEK
|
— | — | — | — | — | — | — | — | — |
| Comprehensive income | — | — |
12 87 5
SEK
|
10 175
SEK
|
1 972
SEK
|
234,000,000
SEK
|
— | — | — | — | — | — |
1 0 903
SEK
|
— |
494,000,000
SEK
|
— |
1 3 48
SEK
|
— |
103,000,000
SEK
|
— |
19 39 9
SEK
|
— | — |
788,000,000
SEK
|
— | — | — | — |
2 0 74 6
SEK
|
18 5 08
SEK
|
— | — | — | — | — | — | — | — |
| Issue of equity | — |
6,000,000
SEK
|
1 7 78
SEK
|
— | — | — | — | — | — | — | — | — |
1 7 78
SEK
|
— | — |
1 7 72
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase through other contributions by owners, equity | — | — |
3,000,000
SEK
|
2,000,000
SEK
|
5,000,000
SEK
|
— | — | — | — | — | — | — |
2,000,000
SEK
|
— | — | — |
6,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — |
6,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — | — |
18 3
SEK
|
91,000,000
SEK
|
92,000,000
SEK
|
— | — | — | — | — | — | — |
91,000,000
SEK
|
— | — | — |
23,000,000
SEK
|
— | — | — |
2,000,000
SEK
|
— | — | — | — | — | — | — |
2 5
SEK
|
2,000,000
SEK
|
— | — | — | — | — | — | — | — |