Analysis Of Income And Expense [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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Analysis of income and expense [abstract] | ||||||||||
| Revenue [abstract] | ||||||||||
| Interest income | — | — | — |
2,626,000,000.0
SEK
|
— | — | — |
24 0 ,6
SEK
|
— | — |
| Material income and expense [abstract] | ||||||||||
| Interest expense | — | — | — |
3 9,7
SEK
|
— | — | — |
35 ,6
SEK
|
— | — |
| Interest income (expense) | — | — | — |
2,229,000,000.0
SEK
|
— | — | — |
20 5 ,0
SEK
|
— | — |
| Revenue and other operating income | — | — | — |
403 ,5
SEK
|
— | — | — |
3,797,000,000.0
SEK
|
— | — |
| Fee and commission income (expense) [abstract] | ||||||||||
| Fee and commission income [abstract] | ||||||||||
| Other fee and commission income | — | — | — |
1 74 , 7
SEK
|
— | — | — |
171 ,4
SEK
|
— | — |
| Fee and commission expense [abstract] | ||||||||||
| Other fee and commission expense | — | — | — |
3 ,7
SEK
|
— | — | — |
40,000,000.0
SEK
|
— | — |
| Expenses by nature [abstract] | ||||||||||
| Depreciation, amortisation and impairment loss (reversal of impairment loss) recognised in profit or loss [abstract] | ||||||||||
| Depreciation and amortisation expense [abstract] | ||||||||||
| Depreciation and amortisation expense | — | — | — |
9 6,0
SEK
|
— | — | — |
101 ,4
SEK
|
— | — |
| Disclosure of attribution of expenses by nature to their function [text block] | — | — | — | — | — | — | — | — | — | — |
| Disclosure of attribution of expenses by nature to their function [abstract] | ||||||||||
| Disclosure of attribution of expenses by nature to their function [line items] | ||||||||||
| Comprehensive income, continuing and discontinued operations [abstract] | ||||||||||
| Comprehensive income |
–
SEK
|
0.0
SEK
|
–
SEK
|
39, 9
SEK
|
39, 9
SEK
|
6 7, 0
SEK
|
–
SEK
|
6 7, 5
SEK
|
–
SEK
|
0, 5
SEK
|