Statement Of Changes In Equity [Abstract]
| Concept |
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 |
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 |
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 |
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 |
1 063
SEK
|
— |
266,000,000
SEK
|
1 371
SEK
|
SEK
|
— | — |
49,000,000
SEK
|
92,000,000
SEK
|
— | — | — | — |
956,000,000
SEK
|
SEK
|
60,000,000
SEK
|
91,000,000
SEK
|
— | — |
1 1 7
SEK
|
— | — |
990,000,000
SEK
|
— |
55,000,000
SEK
|
58,000,000
SEK
|
876,000,000
SEK
|
781,000,000
SEK
|
0
SEK
|
91,000,000
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||
| Profit (loss) | — |
-
SEK
|
— | — | — |
-
SEK
|
-
SEK
|
— | — |
-
SEK
|
205,000,000
SEK
|
205,000,000
SEK
|
175,000,000
SEK
|
— | — | — | — |
175,000,000
SEK
|
-
SEK
|
— |
-
SEK
|
-
SEK
|
— |
-
SEK
|
— | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — | — | — | — | — | — |
67,000,000
SEK
|
— |
62,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — |
-
SEK
|
— | — | — |
67,000,000
SEK
|
-
SEK
|
— | — |
-
SEK
|
272,000,000
SEK
|
205,000,000
SEK
|
113,000,000
SEK
|
— | — | — | — |
175,000,000
SEK
|
0
SEK
|
— |
-
SEK
|
-
SEK
|
— |
62,000,000
SEK
|
— | — | — | — | — | — |
| Issue of equity | — |
-
SEK
|
— | — | — |
-
SEK
|
1,000,000
SEK
|
— | — |
200,000,000
SEK
|
201,000,000
SEK
|
-
SEK
|
0
SEK
|
— | — | — | — |
–
SEK
|
-
SEK
|
— |
–
SEK
|
0
SEK
|
— |
-
SEK
|
— | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — |
-
SEK
|
— | — | — |
-
SEK
|
-
SEK
|
— | — |
7,000,000
SEK
|
7,000,000
SEK
|
-
SEK
|
2,000,000
SEK
|
— | — | — | — |
–
SEK
|
–
SEK
|
— |
2,000,000
SEK
|
–
SEK
|
— |
–
SEK
|
— | — | — | — | — | — |
| Amount removed from reserve of cash flow hedges and included in initial cost or other carrying amount of non-financial asset (liability) or firm commitment for which fair value hedge accounting is applied | — | — | — | — | — | — | — | — | — | — | — | — |
0
SEK
|
— | — | — | — |
-
SEK
|
0
SEK
|
— |
-
SEK
|
-
SEK
|
— |
-
SEK
|
— | — | — | — | — | — |