Statement Of Changes In Equity [Abstract]
| Concept |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
2022-01-01 to 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
As at 2022-12-31 |
2022-01-01 to 2022-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||
| Equity |
153 939
SEK
|
— | — | — | — |
13 358
SEK
|
54 120
SEK
|
83 981
SEK
|
2 480
SEK
|
99 819
SEK
|
— | — |
83 288
SEK
|
13 813
SEK
|
— | — |
147 165
SEK
|
99 581
SEK
|
47 584
SEK
|
2 480
SEK
|
— | — |
72 728
SEK
|
43 471
SEK
|
85 252
SEK
|
2 480
SEK
|
10 044
SEK
|
128 723
SEK
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||
| Profit (loss) | — | — |
5 773
SEK
|
1 514
SEK
|
4 259
SEK
|
— | — | — | — | — |
1 514
SEK
|
3 556
SEK
|
— | — | — |
11 367
SEK
|
— | — | — | — |
14 924
SEK
|
11 367
SEK
|
— | — | — | — | — | — |
| Other comprehensive income | — |
456,000,000
SEK
|
3 547
SEK
|
83,000,000
SEK
|
3 919
SEK
|
— | — | — | — | — |
372,000,000
SEK
|
2 113
SEK
|
— | — |
3 769
SEK
|
3 830
SEK
|
— | — | — | — |
5 943
SEK
|
61,000,000
SEK
|
— | — | — | — | — | — |
| Comprehensive income | — |
456,000,000
SEK
|
9 319
SEK
|
1 597
SEK
|
8 178
SEK
|
— | — | — | — | — |
1 142
SEK
|
5 669
SEK
|
— | — |
3 769
SEK
|
15 197
SEK
|
— | — | — | — |
20 866
SEK
|
11 428
SEK
|
— | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — |
2 437
SEK
|
930,000,000
SEK
|
1 507
SEK
|
— | — | — | — | — |
930,000,000
SEK
|
1 417
SEK
|
— | — | — |
868,000,000
SEK
|
— | — | — | — |
2 285
SEK
|
868,000,000
SEK
|
— | — | — | — | — | — |
| Increase (decrease) through other changes, equity | — | — |
118,000,000
SEK
|
23,000,000
SEK
|
140,000,000
SEK
|
— | — | — | — | — |
23,000,000
SEK
|
148,000,000
SEK
|
— | — | — |
4,000,000
SEK
|
— | — | — | — |
153,000,000
SEK
|
4,000,000
SEK
|
— | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — |
9,000,000
SEK
|
3,000,000
SEK
|
6,000,000
SEK
|
— | — | — | — | — |
3,000,000
SEK
|
8,000,000
SEK
|
— | — | — |
4,000,000
SEK
|
— | — | — | — |
12,000,000
SEK
|
4,000,000
SEK
|
— | — | — | — | — | — |