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) | — | — |
3,692,000,000
SEK
|
3,692,000,000
SEK
|
491,000,000
SEK
|
491,000,000
SEK
|
— | — |
| Other comprehensive income [abstract] | ||||||||
| Components of other comprehensive income that will be reclassified to profit or loss, before tax [abstract] | ||||||||
| Cash flow hedges [abstract] | ||||||||
| Other comprehensive income, before tax, cash flow hedges |
50,000,000
SEK
|
— |
50,000,000
SEK
|
— | — |
33,000,000
SEK
|
33,000,000
SEK
|
— |
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss [abstract] | ||||||||
| Income tax relating to components of other comprehensive income that will be reclassified to profit or loss |
10,000,000
SEK
|
— |
10,000,000
SEK
|
— | — |
7,000,000
SEK
|
7,000,000
SEK
|
— |
| Other comprehensive income | — |
211,000,000
SEK
|
211,000,000
SEK
|
— | — |
369,000,000
SEK
|
— |
369,000,000
SEK
|
| Comprehensive income | — |
211,000,000
SEK
|
3,903,000,000
SEK
|
3,692,000,000
SEK
|
491,000,000
SEK
|
122,000,000
SEK
|
— |
369,000,000
SEK
|
| Comprehensive income attributable to [abstract] | ||||||||
| Comprehensive income, attributable to owners of parent | — | — |
3,903,000,000
SEK
|
— | — |
122,000,000
SEK
|
— | — |