Statement Of Cash Flows [Abstract]
| Concept |
2021-01-01 to 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 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | ||||||||||||
| Cash flows from (used in) operating activities [abstract] | ||||||||||||
| Profit (loss) |
10,000,000
SEK
|
— |
6 362
SEK
|
6 352
SEK
|
— |
3 290
SEK
|
1,000,000
SEK
|
3 235
SEK
|
— |
3 236
SEK
|
— | — |
| Adjustments to reconcile profit (loss) [abstract] | ||||||||||||
| Adjustments for fair value losses (gains) | — | — |
5 395
SEK
|
— | — |
3 255
SEK
|
— | — | — |
3 206
SEK
|
— | — |
| Other adjustments for non-cash items | — | — |
0
SEK
|
— | — |
0
SEK
|
— | — | — |
27,000,000
SEK
|
— | — |
| Cash flows from (used in) operations | — | — |
980,000,000
SEK
|
— | — |
48,000,000
SEK
|
— | — | — |
59,000,000
SEK
|
— | — |
| Income taxes paid (refund), classified as operating activities | — | — |
0
SEK
|
— | — |
0
SEK
|
— | — | — |
0
SEK
|
— | — |
| Cash flows from (used in) investing activities [abstract] | ||||||||||||
| Proceeds from sales of other long-term assets, classified as investing activities | — | — |
0
SEK
|
— | — |
0
SEK
|
— | — | — |
1,000,000
SEK
|
— | — |
| Purchase of other long-term assets, classified as investing activities | — | — |
22,000,000
SEK
|
— | — |
3,000,000
SEK
|
— | — | — |
22,000,000
SEK
|
— | — |
| Cash advances and loans made to other parties, classified as investing activities | — | — |
2,000,000
SEK
|
— | — | — | — | — | — |
0
SEK
|
— | — |
| Cash receipts from repayment of advances and loans made to other parties, classified as investing activities | — | — |
1,000,000
SEK
|
— | — |
2,000,000
SEK
|
— | — | — |
2,000,000
SEK
|
— | — |
| Interest paid, classified as investing activities | — | — |
1,000,000
SEK
|
— | — |
10,000,000
SEK
|
— | — | — |
10,000,000
SEK
|
— | — |
| Interest received, classified as investing activities | — | — |
4,000,000
SEK
|
— | — |
10,000,000
SEK
|
— | — | — |
6,000,000
SEK
|
— | — |
| Cash flows from (used in) investing activities | — | — |
1 6 70
SEK
|
— | — |
455,000,000
SEK
|
— | — | — |
433,000,000
SEK
|
— | — |
| Cash flows from (used in) financing activities [abstract] | ||||||||||||
| Proceeds from issuing shares | — | — | — | — | — |
985,000,000
SEK
|
— | — | — |
985,000,000
SEK
|
— | — |
| Proceeds from borrowings, classified as financing activities | — | — |
3,000,000
SEK
|
— | — |
0
SEK
|
— | — | — |
40,000,000
SEK
|
— | — |
| Repayments of borrowings, classified as financing activities | — | — |
0
SEK
|
— | — |
2,000,000
SEK
|
— | — | — |
1,000,000
SEK
|
— | — |
| Payments of lease liabilities, classified as financing activities | — | — |
2,000,000
SEK
|
— | — |
2,000,000
SEK
|
— | — | — |
1 4
SEK
|
— | — |
| Cash flows from (used in) financing activities | — | — |
15 1
SEK
|
— | — |
91 6
SEK
|
— | — | — |
940,000,000
SEK
|
— | — |
| Increase (decrease) in cash and cash equivalents before effect of exchange rate changes | — | — |
8 41
SEK
|
— | — |
509,000,000
SEK
|
— | — | — |
567,000,000
SEK
|
— | — |
| Effect of exchange rate changes on cash and cash equivalents [abstract] | ||||||||||||
| Effect of exchange rate changes on cash and cash equivalents | — | — |
0
SEK
|
— | — |
0
SEK
|
— | — | — |
23,000,000
SEK
|
— | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — | — |
8 41
SEK
|
— | — |
509,000,000
SEK
|
— | — | — |
567,000,000
SEK
|
— | — |
| Cash and cash equivalents | — |
326,000,000
SEK
|
— | — |
1 167
SEK
|
— | — | — |
1 255
SEK
|
— |
710,000,000
SEK
|
65 8
SEK
|