Statement Of Financial Position [Abstract]
| Concept |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2025-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 2024-03-31 |
As at 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 financial position [abstract] | |||||||||||||||||||||
| Assets [abstract] | |||||||||||||||||||||
| Non-current assets [abstract] | |||||||||||||||||||||
| Property, plant and equipment | — | — |
699,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
631,000,000
SEK
|
— | — | — | — | — | — | — |
| Right-of-use assets | — | — |
748,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
694,000,000
SEK
|
— | — | — | — | — | — | — |
| Deferred tax assets | — | — |
33,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
39,000,000
SEK
|
— | — | — | — | — | — | — |
| Other non-current financial assets | — | — |
46,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
35,000,000
SEK
|
— | — | — | — | — | — | — |
| Non-current assets | — | — |
10 235
SEK
|
— | — | — | — | — | — | — | — | — | — |
8 865
SEK
|
— | — | — | — | — | — | — |
| Current assets [abstract] | |||||||||||||||||||||
| Current inventories | — | — |
3 260
SEK
|
— | — | — | — | — | — | — | — | — | — |
3 125
SEK
|
— | — | — | — | — | — | — |
| Current tax assets, current | — | — |
54,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
37,000,000
SEK
|
— | — | — | — | — | — | — |
| Cash and cash equivalents | — | — |
1 168
SEK
|
— | — | — | — | — | — | — | — | — | — |
798,000,000
SEK
|
— | — |
606,000,000
SEK
|
— | — | — | — |
| Current assets | — | — |
8 278
SEK
|
— | — | — | — | — | — | — | — | — | — |
7 792
SEK
|
— | — | — | — | — | — | — |
| Assets | — | — |
18 513
SEK
|
— | — | — | — | — | — | — | — | — | — |
16 657
SEK
|
— | — | — | — | — | — | — |
| Equity and liabilities [abstract] | |||||||||||||||||||||
| Equity [abstract] | |||||||||||||||||||||
| Issued capital | — | — |
51,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
51,000,000
SEK
|
— | — | — | — | — | — | — |
| Retained earnings | — | — |
6 071
SEK
|
— | — | — | — | — | — | — | — | — | — |
4 959
SEK
|
— | — | — | — | — | — | — |
| Other reserves | — | — |
161,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
620,000,000
SEK
|
— | — | — | — | — | — | — |
| Equity attributable to owners of parent | — | — |
6 627
SEK
|
— | — | — | — | — | — | — | — | — | — |
5 974
SEK
|
— | — | — | — | — | — | — |
| Non-controlling interests | — | — |
436,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
504,000,000
SEK
|
— | — | — | — | — | — | — |
| 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
|
| Liabilities [abstract] | |||||||||||||||||||||
| Non-current liabilities [abstract] | |||||||||||||||||||||
| Non-current provisions [abstract] | |||||||||||||||||||||
| Non-current provisions for employee benefits | — | — |
262,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
241,000,000
SEK
|
— | — | — | — | — | — | — |
| Deferred tax liabilities | — | — |
924,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
767,000,000
SEK
|
— | — | — | — | — | — | — |
| Non-current liabilities | — | — |
6 125
SEK
|
— | — | — | — | — | — | — | — | — | — |
4 925
SEK
|
— | — | — | — | — | — | — |
| Current liabilities [abstract] | |||||||||||||||||||||
| Current provisions [abstract] | |||||||||||||||||||||
| Current provisions | — | — |
170,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
109,000,000
SEK
|
— | — | — | — | — | — | — |
| Current tax liabilities, current | — | — |
221,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — |
210,000,000
SEK
|
— | — | — | — | — | — | — |
| Current liabilities | — | — |
5 325
SEK
|
— | — | — | — | — | — | — | — | — | — |
5 254
SEK
|
— | — | — | — | — | — | — |
| Liabilities | — | — |
11 450
SEK
|
— | — | — | — | — | — | — | — | — | — |
10 179
SEK
|
— | — | — | — | — | — | — |
| Equity and liabilities | — | — |
18 513
SEK
|
— | — | — | — | — | — | — | — | — | — |
16 657
SEK
|
— | — | — | — | — | — | — |