Statement Of Changes In Equity [Abstract]
| Concept |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
As at 2022-03-31 |
2021-04-01 to 2022-03-31 |
2021-04-01 to 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
2021-04-01 to 2022-03-31 |
As at 2022-03-31 |
As at 2022-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
As at 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
2020-04-01 to 2021-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
As at 2020-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||
| Equity | — | — |
71,000,000
SEK
|
— | — |
26,000,000
SEK
|
1 915
SEK
|
57,000,000
SEK
|
1 813
SEK
|
— |
1 932
SEK
|
17,000,000
SEK
|
71,000,000
SEK
|
56,000,000
SEK
|
1 715
SEK
|
57,000,000
SEK
|
1 629
SEK
|
14,000,000
SEK
|
1 701
SEK
|
— | — | — | — | — |
12,000,000
SEK
|
1 631
SEK
|
1 525
SEK
|
22,000,000
SEK
|
1 643
SEK
|
71,000,000
SEK
|
57,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||
| Profit (loss) |
200,000,000
SEK
|
2,000,000
SEK
|
— |
200,000,000
SEK
|
— | — | — | — | — |
202,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
166,000,000
SEK
|
164,000,000
SEK
|
2,000,000
SEK
|
164,000,000
SEK
|
— | — | — | — | — | — | — |
| Other comprehensive income |
94,000,000
SEK
|
0
SEK
|
— |
64,000,000
SEK
|
30,000,000
SEK
|
— | — | — | — |
94,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
34,000,000
SEK
|
38,000,000
SEK
|
4,000,000
SEK
|
0
SEK
|
38,000,000
SEK
|
— | — | — | — | — | — | — |
| Comprehensive income |
294,000,000
SEK
|
2,000,000
SEK
|
— |
264,000,000
SEK
|
30,000,000
SEK
|
— | — | — | — |
296,000,000
SEK
|
— | — | — | — | — | — | — | — | — |
34,000,000
SEK
|
128,000,000
SEK
|
160,000,000
SEK
|
2,000,000
SEK
|
126,000,000
SEK
|
— | — | — | — | — | — | — |
| Dividends recognised as distributions to owners |
80,000,000
SEK
|
— | — |
80,000,000
SEK
|
— | — | — | — | — |
80,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
40,000,000
SEK
|
40,000,000
SEK
|
— |
40,000,000
SEK
|
— | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity |
0
SEK
|
1,000,000
SEK
|
— | — | — | — | — | — | — |
1,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
0
SEK
|
— |
0
SEK
|
0
SEK
|
— | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
17,000,000
SEK
|
17,000,000
SEK
|
— |
17,000,000
SEK
|
— | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
0
SEK
|
— | — |
0
SEK
|
— | — | — | — | — |
0
SEK
|
— | — | — | — | — | — | — | — | — | — |
1,000,000
SEK
|
1,000,000
SEK
|
— |
1,000,000
SEK
|
— | — | — | — | — | — | — |