Statement Of Changes In Equity [Abstract]
| Concept |
As at 2022-04-30 |
As at 2022-04-30 |
As at 2022-04-30 |
As at 2022-04-30 |
As at 2022-04-30 |
2021-05-01 to 2022-04-30 |
2021-05-01 to 2022-04-30 |
2021-05-01 to 2022-04-30 |
2021-05-01 to 2022-04-30 |
As at 2022-04-30 |
2021-05-01 to 2022-04-30 |
2021-05-01 to 2022-04-30 |
As at 2022-04-30 |
As at 2022-04-30 |
As at 2021-04-30 |
2020-05-01 to 2021-04-30 |
2020-05-01 to 2021-04-30 |
2020-05-01 to 2021-04-30 |
As at 2021-04-30 |
As at 2021-04-30 |
As at 2021-04-30 |
As at 2021-04-30 |
As at 2021-04-30 |
As at 2021-04-30 |
As at 2021-04-30 |
2020-05-01 to 2021-04-30 |
2020-05-01 to 2021-04-30 |
2020-05-01 to 2021-04-30 |
As at 2020-04-30 |
As at 2020-04-30 |
As at 2020-04-30 |
As at 2020-04-30 |
As at 2020-04-30 |
As at 2020-04-30 |
As at 2020-04-30 |
As at 2020-04-30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||
| Equity |
6,883,000,000
SEK
|
1,227,000,000
SEK
|
8,913,000,000
SEK
|
3,000,000
SEK
|
192,000,000
SEK
|
— | — | — | — |
812,000,000
SEK
|
— | — |
8,916,000,000
SEK
|
201,000,000
SEK
|
8,197,000,000
SEK
|
— | — | — |
469,000,000
SEK
|
154,000,000
SEK
|
6,568,000,000
SEK
|
812,000,000
SEK
|
192,000,000
SEK
|
8, 197
SEK
|
0
SEK
|
— | — | — |
1,307,000,000
SEK
|
192,000,000
SEK
|
29,000,000
SEK
|
5,830,000,000
SEK
|
8, 113
SEK
|
1,000,000
SEK
|
8,113,000,000
SEK
|
812,000,000
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — | — | — |
3,000,000
SEK
|
1, 154
SEK
|
1,154,000,000
SEK
|
— | — | — |
1, 157
SEK
|
— | — | — | — | — |
1, 253
SEK
|
— | — | — | — | — | — | — |
1,254,000,000
SEK
|
1,000,000
SEK
|
1,254,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Other comprehensive income | — | — | — | — | — |
0
SEK
|
16,000,000
SEK
|
386,000,000
SEK
|
758,000,000
SEK
|
— |
355,000,000
SEK
|
386,000,000
SEK
|
— | — | — |
838,000,000
SEK
|
184,000,000
SEK
|
494,000,000
SEK
|
— | — | — | — | — | — | — |
160,000,000
SEK
|
0
SEK
|
494,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Comprehensive income | — | — | — | — | — |
3,000,000
SEK
|
1,13 7
SEK
|
1,540,000,000
SEK
|
75 8
SEK
|
— |
355,000,000
SEK
|
1,543,000,000
SEK
|
— | — | — |
8 38
SEK
|
184,000,000
SEK
|
759,000,000
SEK
|
— | — | — | — | — | — | — |
1,414,000,000
SEK
|
1,000,000
SEK
|
76 0
SEK
|
— | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — | — | — | — | — |
841,000,000
SEK
|
841,000,000
SEK
|
— | — | — |
841,000,000
SEK
|
— | — | — | — | — |
688,000,000
SEK
|
— | — | — | — | — | — | — |
688,000,000
SEK
|
— |
688,000,000
SEK
|
— | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — | — | — | — |
17,000,000
SEK
|
17,000,000
SEK
|
— | — | — |
17,000,000
SEK
|
— | — | — | — | — |
12,000,000
SEK
|
— | — | — | — | — | — | — |
12,000,000
SEK
|
— |
12,000,000
SEK
|
— | — | — | — | — | — | — | — |