Statement Of Comprehensive Income [Abstract]
| Concept |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 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 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||||||
| Profit (loss) |
2,000,000
SEK
|
-
SEK
|
— |
107,000,000
SEK
|
-
SEK
|
105,000,000
SEK
|
107,000,000
SEK
|
68,000,000
SEK
|
-
SEK
|
66,000,000
SEK
|
— |
2,000,000
SEK
|
68,000,000
SEK
|
-
SEK
|
| Other comprehensive income [abstract] | ||||||||||||||
| Components of other comprehensive income that will not be reclassified to profit or loss, before tax [abstract] | ||||||||||||||
| Other comprehensive income, before tax, gains (losses) on remeasurements of defined benefit plans |
-
SEK
|
-
SEK
|
-
SEK
|
12,000,000
SEK
|
-
SEK
|
12,000,000
SEK
|
12,000,000
SEK
|
30,000,000
SEK
|
-
SEK
|
30,000,000
SEK
|
-
SEK
|
-
SEK
|
30,000,000
SEK
|
-
SEK
|
| Other comprehensive income | — | — | — | — | — |
5,000,000
SEK
|
— | — | — |
28,000,000
SEK
|
— | — | — | — |
| Comprehensive income |
4,000,000
SEK
|
-
SEK
|
5,000,000
SEK
|
114,000,000
SEK
|
-
SEK
|
110,000,000
SEK
|
119,000,000
SEK
|
98,000,000
SEK
|
-
SEK
|
94,000,000
SEK
|
7,000,000
SEK
|
3,000,000
SEK
|
91,000,000
SEK
|
-
SEK
|
| Comprehensive income attributable to [abstract] | ||||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — | — |
114,000,000
SEK
|
— | — | — |
91,000,000
SEK
|
— | — | — | — |
| Comprehensive income, attributable to non-controlling interests | — | — | — | — | — |
4,000,000
SEK
|
— | — | — |
3,000,000
SEK
|
— | — | — | — |