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 |
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 |
As at 2022-01-01 |
As at 2022-01-01 |
As at 2022-01-01 |
As at 2022-01-01 |
As at 2022-01-01 |
As at 2022-01-01 |
As at 2022-01-01 |
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 |
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 |
2021-01-01 to 2021-12-31 |
As at 2021-01-01 |
As at 2021-01-01 |
As at 2021-01-01 |
As at 2021-01-01 |
As at 2021-01-01 |
As at 2021-01-01 |
As at 2021-01-01 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||||
| Equity |
12 178
SEK
|
— | — | — | — | — |
858,000,000
SEK
|
— |
2,000,000
SEK
|
6 085
SEK
|
283,000,000
SEK
|
12 176
SEK
|
4 949
SEK
|
— |
10 992
SEK
|
5 533
SEK
|
283,000,000
SEK
|
1,000,000
SEK
|
10 993
SEK
|
234,000,000
SEK
|
4 942
SEK
|
— |
5 533
SEK
|
234,000,000
SEK
|
4 942
SEK
|
— | — |
10 993
SEK
|
10 992
SEK
|
1,000,000
SEK
|
— |
283,000,000
SEK
|
— | — | — |
10 005
SEK
|
282,000,000
SEK
|
113,000,000
SEK
|
4 864
SEK
|
4 971
SEK
|
10 005
SEK
|
1,000,000
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — |
974,000,000
SEK
|
974,000,000
SEK
|
0
SEK
|
— | — | — | — | — | — | — |
974,000,000
SEK
|
— | — | — | — | — | — | — |
0
SEK
|
— | — | — | — |
1 129
SEK
|
— | — | — | — | — | — |
1 130
SEK
|
1 129
SEK
|
— | — | — | — | — | — | — |
| Other comprehensive income | — | — |
624,000,000
SEK
|
826,000,000
SEK
|
202,000,000
SEK
|
0
SEK
|
— | — | — | — | — | — | — |
825,000,000
SEK
|
— | — | — | — | — | — | — |
0
SEK
|
— | — | — |
347,000,000
SEK
|
452,000,000
SEK
|
— | — | — | — | — | — |
452,000,000
SEK
|
106,000,000
SEK
|
— | — | — | — | — | — | — |
| Comprehensive income | — |
—
SEK
|
624,000,000
SEK
|
1 800
SEK
|
1 176
SEK
|
0
SEK
|
— |
—
SEK
|
— | — | — | — | — |
1 800
SEK
|
— | — | — | — | — | — | — |
0
SEK
|
— | — | — |
347,000,000
SEK
|
1 581
SEK
|
— | — | — |
—
SEK
|
— |
—
SEK
|
1 582
SEK
|
1 235
SEK
|
— | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — | — |
623,000,000
SEK
|
623,000,000
SEK
|
0
SEK
|
— | — | — | — | — | — | — |
623,000,000
SEK
|
— | — | — | — | — | — | — |
0
SEK
|
— | — | — | — |
566,000,000
SEK
|
— | — | — | — | — | — |
566,000,000
SEK
|
566,000,000
SEK
|
— | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — | — | — |
—
SEK
|
1,000,000
SEK
|
1,000,000
SEK
|
— | — | — | — | — | — | — |
1,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |