Statement Of Changes In Equity [Abstract]
| Concept |
As at 2025-03-31 |
2024-04-01 to 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 |
As at 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 |
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 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | |||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||
| Equity |
79,000,000
SEK
|
— | — |
415,000,000
SEK
|
— |
49,000,000
SEK
|
3 452
SEK
|
3 837
SEK
|
— | — |
72,000,000
SEK
|
3 468
SEK
|
2 932
SEK
|
— |
415,000,000
SEK
|
49,000,000
SEK
|
— | — |
3 009
SEK
|
415,000,000
SEK
|
49,000,000
SEK
|
2 506
SEK
|
39,000,000
SEK
|
| Changes in equity [abstract] | |||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||
| Profit (loss) | — |
1 019
SEK
|
1 019
SEK
|
— |
1 019
SEK
|
— | — | — | — | — | — | — | — |
877,000,000
SEK
|
— | — |
877,000,000
SEK
|
877,000,000
SEK
|
— | — | — | — | — |
| Comprehensive income | — |
870,000,000
SEK
|
870,000,000
SEK
|
— |
1 021
SEK
|
— | — | — |
15 1
SEK
|
33,000,000
SEK
|
— | — | — |
904,000,000
SEK
|
— | — |
904,000,000
SEK
|
8 71
SEK
|
— | — | — | — | — |
| Dividends recognised as distributions to owners | — |
392,000,000
SEK
|
— | — |
392,000,000
SEK
|
— | — | — | — | — | — | — | — |
329,000,000
SEK
|
— | — | — |
329,000,000
SEK
|
— | — | — | — | — |