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 |
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 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
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 |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||
| Equity |
33 463
SEK
|
— | — | — |
1 078
SEK
|
— |
3 616
SEK
|
27 988
SEK
|
7 81
SEK
|
33 463
SEK
|
— | — |
26 228
SEK
|
493,000,000
SEK
|
— | — |
31 079
SEK
|
— |
31 079
SEK
|
3 578
SEK
|
— |
780,000,000
SEK
|
— | — |
17 765
SEK
|
338,000,000
SEK
|
22 452
SEK
|
808,000,000
SEK
|
3 542
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||
| Profit (loss) | — | — |
2 718
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
9 807
SEK
|
— | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — |
585,000,000
SEK
|
— | — | — | — |
585,000,000
SEK
|
— | — | — |
15 5
SEK
|
15 5
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — | — |
3 303
SEK
|
2 718
SEK
|
— | — | — | — | — | — |
2 718
SEK
|
— | — | — | — |
9 807
SEK
|
— | — | — | — | — | — |
9 963
SEK
|
9 807
SEK
|
— | — | — | — | — |
| Increase through other contributions by owners, equity | — |
1,000,000
SEK
|
— | — | — | — | — | — | — | — |
39,000,000
SEK
|
38,000,000
SEK
|
— | — | — |
36,000,000
SEK
|
— |
36,000,000
SEK
|
— | — |
1,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — |
7,000,000
SEK
|
— | — | — | — | — | — |
7,000,000
SEK
|
— | — | — | — |
7,000,000
SEK
|
— | — | — | — | — | — | — |
7,000,000
SEK
|
— | — | — | — | — |