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 |
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) |
10,000,000
SEK
|
–
SEK
|
–
SEK
|
–
SEK
|
1 138
SEK
|
1 148
SEK
|
1 002
SEK
|
–
SEK
|
997,000,000
SEK
|
–
SEK
|
5,000,000
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 | — | — | — | — |
158,000,000
SEK
|
— | — | — |
10,000,000
SEK
|
— | — | — |
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||||||
| Exchange differences on translation [abstract] | ||||||||||||
| Other comprehensive income, before tax, exchange differences on translation of foreign operations | — | — | — | — |
98,000,000
SEK
|
— | — | — |
150,000,000
SEK
|
— | — | — |
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract] | ||||||||||||
| Income tax relating to remeasurements of defined benefit plans included in other comprehensive income | — | — | — | — |
32,000,000
SEK
|
— | — | — |
2,000,000
SEK
|
— | — | — |
| Other comprehensive income |
–
SEK
|
–
SEK
|
98,000,000
SEK
|
–
SEK
|
223,000,000
SEK
|
125,000,000
SEK
|
8,000,000
SEK
|
–
SEK
|
142,000,000
SEK
|
150,000,000
SEK
|
–
SEK
|
–
SEK
|
| Comprehensive income |
10,000,000
SEK
|
–
SEK
|
98,000,000
SEK
|
–
SEK
|
1 361
SEK
|
1 273
SEK
|
1 010
SEK
|
–
SEK
|
855,000,000
SEK
|
150,000,000
SEK
|
5,000,000
SEK
|
–
SEK
|
| Comprehensive income attributable to [abstract] | ||||||||||||
| Comprehensive income, attributable to owners of parent | — | — | — | — |
1 371
SEK
|
— | — | — |
853,000,000
SEK
|
— | — | — |
| Comprehensive income, attributable to non-controlling interests | — | — | — | — |
10,000,000
SEK
|
— | — | — |
2,000,000
SEK
|
— | — | — |