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 |
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 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 |
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 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
SEK
|
1 227
SEK
|
8 913
SEK
|
3,000,000
SEK
|
192,000,000
SEK
|
— | — | — | — | — | — |
8 916
SEK
|
201,000,000
SEK
|
812,000,000
SEK
|
8 197
SEK
|
— | — | — |
469,000,000
SEK
|
154,000,000
SEK
|
6 568
SEK
|
0
SEK
|
8 197
SEK
|
192,000,000
SEK
|
— | — | — |
812,000,000
SEK
|
1 307
SEK
|
192,000,000
SEK
|
29,000,000
SEK
|
5 830
SEK
|
8 113
SEK
|
1,000,000
SEK
|
8 113
SEK
|
812,000,000
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||
| Profit (loss) | — | — | — | — | — |
3,000,000
SEK
|
1 154
SEK
|
1 154
SEK
|
— | — |
1 157
SEK
|
— | — | — | — | — | — |
1 253
SEK
|
— | — | — | — | — | — |
1 254
SEK
|
1,000,000
SEK
|
1 254
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
|
1 137
SEK
|
1 540
SEK
|
758,000,000
SEK
|
355,000,000
SEK
|
1 543
SEK
|
— | — | — | — |
838,000,000
SEK
|
184,000,000
SEK
|
759,000,000
SEK
|
— | — | — | — | — | — |
1 414
SEK
|
1,000,000
SEK
|
760,000,000
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
|
— | — | — | — | — | — | — | — | — |