Statement Of Financial Position [Abstract]
| Concept |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-01-01 |
As at 2021-01-01 |
As at 2021-01-01 |
As at 2021-01-01 |
As at 2021-01-01 |
As at 2021-01-01 |
As at 2021-01-01 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of financial position [abstract] | ||||||||||||||||||||||||||||
| Assets [abstract] | ||||||||||||||||||||||||||||
| Non-current assets [abstract] | ||||||||||||||||||||||||||||
| Property, plant and equipment | — | — | — |
495,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
539,000,000
SEK
|
— | — | — | — | — | — | — |
| Right-of-use assets | — | — | — |
1 967
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
2 266
SEK
|
— | — | — | — | — | — | — |
| Deferred tax assets | — | — | — |
174,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
213,000,000
SEK
|
— | — | — | — | — | — | — |
| Non-current assets | — | — | — |
16 857
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
15 928
SEK
|
— | — | — | — | — | — | — |
| Current assets [abstract] | ||||||||||||||||||||||||||||
| Cash and cash equivalents | — | — | — |
2 112
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1 930
SEK
|
— | — | — | — |
997,000,000
SEK
|
— | — |
| Current assets | — | — | — |
9 056
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
7 592
SEK
|
— | — | — | — | — | — | — |
| Assets | — | — | — |
25 913
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
23 520
SEK
|
— | — | — | — | — | — | — |
| Equity and liabilities [abstract] | ||||||||||||||||||||||||||||
| Equity [abstract] | ||||||||||||||||||||||||||||
| Issued capital | — | — | — |
283,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
282,000,000
SEK
|
— | — | — | — | — | — | — |
| Retained earnings | — | — | — |
5 533
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
4 864
SEK
|
— | — | — | — | — | — | — |
| Other equity interest | — | — | — |
4 942
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
4 971
SEK
|
— | — | — | — | — | — | — |
| Other reserves | — | — | — |
234,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
113,000,000
SEK
|
— | — | — | — | — | — | — |
| Equity attributable to owners of parent | — | — | — |
10 992
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
10 005
SEK
|
— | — | — | — | — | — | — |
| Non-controlling interests | — | — | — |
1,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,000,000
SEK
|
— | — | — | — | — | — | — |
| Equity |
5 533
SEK
|
234,000,000
SEK
|
4 942
SEK
|
10 993
SEK
|
10 992
SEK
|
1,000,000
SEK
|
283,000,000
SEK
|
282,000,000
SEK
|
10 005
SEK
|
4 864
SEK
|
113,000,000
SEK
|
4 971
SEK
|
10 005
SEK
|
1,000,000
SEK
|
4 864
SEK
|
1,000,000
SEK
|
10 005
SEK
|
282,000,000
SEK
|
4 971
SEK
|
113,000,000
SEK
|
10 005
SEK
|
9 367
SEK
|
1,000,000
SEK
|
4 824
SEK
|
322,000,000
SEK
|
9 369
SEK
|
3 941
SEK
|
280,000,000
SEK
|
| Liabilities [abstract] | ||||||||||||||||||||||||||||
| Non-current liabilities [abstract] | ||||||||||||||||||||||||||||
| Non-current provisions [abstract] | ||||||||||||||||||||||||||||
| Non-current provisions for employee benefits | — | — | — |
216,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
341,000,000
SEK
|
— | — | — | — | — | — | — |
| Other non-current provisions | — | — | — |
72,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
91,000,000
SEK
|
— | — | — | — | — | — | — |
| Deferred tax liabilities | — | — | — |
389,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
461,000,000
SEK
|
— | — | — | — | — | — | — |
| Non-current liabilities | — | — | — |
7 014
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
6 314
SEK
|
— | — | — | — | — | — | — |
| Current liabilities [abstract] | ||||||||||||||||||||||||||||
| Current provisions [abstract] | ||||||||||||||||||||||||||||
| Other current provisions | — | — | — |
34,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
74,000,000
SEK
|
— | — | — | — | — | — | — |
| Current tax liabilities, current | — | — | — |
296,000,000
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
162,000,000
SEK
|
— | — | — | — | — | — | — |
| Current liabilities | — | — | — |
7 905
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
7 199
SEK
|
— | — | — | — | — | — | — |
| Liabilities | — | — | — |
14 919
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
13 513
SEK
|
— | — | — | — | — | — | — |
| Equity and liabilities | — | — | — |
25 913
SEK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
23 520
SEK
|
— | — | — | — | — | — | — |