Statement Of Changes In Equity [Abstract]
| Concept |
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 |
2021-01-01 to 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 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 |
As at 2019-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||
| Equity |
100,000
NOK
|
143,900,000
NOK
|
— | — |
171,800,000
NOK
|
— |
28,000,000
NOK
|
— | — | — |
25,800,000
NOK
|
100,000
NOK
|
92,400,000
NOK
|
— |
118,100,000
NOK
|
— |
79,800,000
NOK
|
105,600,000
NOK
|
0
NOK
|
25,800,000
NOK
|
| Changes in equity [abstract] | ||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||
| Profit (loss) | — | — | — | — | — | — | — |
62,800,000
NOK
|
28,500,000
NOK
|
— | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — | — | — |
65,100,000
NOK
|
— | — | — |
65,100,000
NOK
|
28,500,000
NOK
|
— | — | — | — |
28,500,000
NOK
|
— | — | — | — | — | — |
| Issue of equity | — | — | — |
113,200,000
NOK
|
— |
2,200,000
NOK
|
— |
115,400,000
NOK
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity | — | — | — |
3,400,000
NOK
|
— | — | — |
3,400,000
NOK
|
1,900,000
NOK
|
— | — | — | — |
1,900,000
NOK
|
— | — | — | — | — | — |
| Increase (decrease) in equity | — | — |
0
NOK
|
51,600,000
NOK
|
— |
2,200,000
NOK
|
— |
53,700,000
NOK
|
12,500,000
NOK
|
100,000
NOK
|
— | — | — |
12,600,000
NOK
|
— |
0
NOK
|
— | — | — | — |