Statement Of Changes In Equity [Abstract]
| Concept |
As at 2025-03-31 |
2024-04-01 to 2025-03-31 |
As at 2025-03-31 |
2024-04-01 to 2025-03-31 |
As at 2025-03-31 |
2024-04-01 to 2025-03-31 |
As at 2025-03-31 |
2024-04-01 to 2025-03-31 |
As at 2025-03-31 |
2024-04-01 to 2025-03-31 |
As at 2025-03-31 |
2024-04-01 to 2025-03-31 |
As at 2025-03-31 |
2024-04-01 to 2025-03-31 |
2023-04-01 to 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
2023-04-01 to 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
2023-04-01 to 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
2023-04-01 to 2024-03-31 |
As at 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
2023-04-01 to 2024-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
As at 2023-03-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||
| Equity |
161,000,000
SEK
|
— |
344,000,000
SEK
|
— |
7 063
SEK
|
— |
436,000,000
SEK
|
— |
51,000,000
SEK
|
— |
6 071
SEK
|
— |
6 627
SEK
|
— | — |
620,000,000
SEK
|
5 974
SEK
|
— |
344,000,000
SEK
|
4 959
SEK
|
— |
504,000,000
SEK
|
51,000,000
SEK
|
— |
6 478
SEK
|
— | — | — |
5 184
SEK
|
344,000,000
SEK
|
5 573
SEK
|
51,000,000
SEK
|
389,000,000
SEK
|
4 347
SEK
|
442,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||
| Profit (loss) | — |
1 892
SEK
|
— |
–
SEK
|
— |
1 940
SEK
|
— |
1 892
SEK
|
— |
48,000,000
SEK
|
— |
–
SEK
|
— |
–
SEK
|
-
SEK
|
— | — |
-
SEK
|
— | — |
1 632
SEK
|
— | — |
1 691
SEK
|
— |
-
SEK
|
1 632
SEK
|
59,000,000
SEK
|
— | — | — | — | — | — | — |
| Other comprehensive income | — |
478,000,000
SEK
|
— |
–
SEK
|
— |
495,000,000
SEK
|
— |
19,000,000
SEK
|
— |
17,000,000
SEK
|
— |
–
SEK
|
— |
459,000,000
SEK
|
178,000,000
SEK
|
— | — |
-
SEK
|
— | — |
158,000,000
SEK
|
— | — |
163,000,000
SEK
|
— |
-
SEK
|
20,000,000
SEK
|
5,000,000
SEK
|
— | — | — | — | — | — | — |
| Comprehensive income | — |
1 414
SEK
|
— |
–
SEK
|
— |
1 445
SEK
|
— |
1 873
SEK
|
— |
31,000,000
SEK
|
— |
–
SEK
|
— |
459,000,000
SEK
|
178,000,000
SEK
|
— | — |
-
SEK
|
— | — |
1 790
SEK
|
— | — |
1 854
SEK
|
— |
-
SEK
|
1 612
SEK
|
64,000,000
SEK
|
— | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — |
755,000,000
SEK
|
— |
–
SEK
|
— |
788,000,000
SEK
|
— |
755,000,000
SEK
|
— |
33,000,000
SEK
|
— |
–
SEK
|
— |
–
SEK
|
-
SEK
|
— | — |
-
SEK
|
— | — |
674,000,000
SEK
|
— | — |
722,000,000
SEK
|
— |
-
SEK
|
674,000,000
SEK
|
48,000,000
SEK
|
— | — | — | — | — | — | — |
| Increase (decrease) through changes in ownership interests in subsidiaries that do not result in loss of control, equity | — |
229,000,000
SEK
|
— |
–
SEK
|
— |
163,000,000
SEK
|
— |
229,000,000
SEK
|
— |
66,000,000
SEK
|
— |
–
SEK
|
— |
–
SEK
|
-
SEK
|
— | — |
-
SEK
|
— | — |
6,000,000
SEK
|
— | — |
93,000,000
SEK
|
— |
-
SEK
|
6,000,000
SEK
|
99,000,000
SEK
|
— | — | — | — | — | — | — |