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 |
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) |
87,000,000
SEK
|
3,223,000,000
SEK
|
3,311,000,000
SEK
|
3,223,000,000
SEK
|
2,871,000,000
SEK
|
2,919,000,000
SEK
|
48,000,000
SEK
|
2,871,000,000
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 | — | — |
88,000,000
SEK
|
— | — |
89,000,000
SEK
|
— | — |
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||
| Exchange differences on translation [abstract] | ||||||||
| Gains (losses) on exchange differences on translation of foreign operations, before tax | — | — |
1,785,000,000
SEK
|
— | — |
2,249,000,000
SEK
|
— | — |
| Hedges of net investment in foreign operations [abstract] | ||||||||
| Other comprehensive income, before tax, hedges of net investments in foreign operations | — | — |
96,000,000
SEK
|
— | — |
157,000,000
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 | — | — |
26,000,000
SEK
|
— | — |
26,000,000
SEK
|
— | — |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract] | ||||||||
| Income tax relating to hedges of net investments in foreign operations included in other comprehensive income | — | — |
20,000,000
SEK
|
— | — |
32,000,000
SEK
|
— | — |
| Other comprehensive income |
3,000,000
SEK
|
1,768,000,000
SEK
|
1,771,000,000
SEK
|
1,768,000,000
SEK
|
2,176,000,000
SEK
|
2,187,000,000
SEK
|
11,000,000
SEK
|
2,176,000,000
SEK
|
| Comprehensive income | — | — |
5,082,000,000
SEK
|
— | — |
732,000,000
SEK
|
— | — |
| Comprehensive income attributable to [abstract] | ||||||||
| Comprehensive income, attributable to owners of parent | — | — |
4,992,000,000
SEK
|
— | — |
695,000,000
SEK
|
— | — |
| Comprehensive income, attributable to non-controlling interests | — | — |
90,000,000
SEK
|
— | — |
37,000,000
SEK
|
— | — |