Statement Of Comprehensive Income [Abstract]
| Concept |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2023-01-01 to 2023-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|
| Statement of comprehensive income [abstract] | ||||||||||
| Profit (loss) |
-
SEK
|
-
SEK
|
3,409,000,000
SEK
|
3,409,000,000
SEK
|
-
SEK
|
-
SEK
|
3,287,000,000
SEK
|
3,287,000,000
SEK
|
-
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 | — | — |
350,000,000
SEK
|
— | — | — |
353,000,000
SEK
|
— | — | — |
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss [abstract] | ||||||||||
| Income tax relating to components of other comprehensive income that will not be reclassified to profit or loss | — | — |
70,000,000
SEK
|
— | — | — |
80,000,000
SEK
|
— | — | — |
| Other comprehensive income |
-
SEK
|
-
SEK
|
262,000,000
SEK
|
280,000,000
SEK
|
542,000,000
SEK
|
-
SEK
|
2,632,000,000
SEK
|
273,000,000
SEK
|
2,359,000,000
SEK
|
-
SEK
|
| Comprehensive income |
-
SEK
|
-
SEK
|
3,147,000,000
SEK
|
3,689,000,000
SEK
|
542,000,000
SEK
|
-
SEK
|
5,919,000,000
SEK
|
3,560,000,000
SEK
|
2,359,000,000
SEK
|
-
SEK
|
| Comprehensive income attributable to [abstract] | ||||||||||
| Comprehensive income, attributable to owners of parent | — | — |
3,147,000,000
SEK
|
— | — | — |
5,919,000,000
SEK
|
— | — | — |