Statement Of Changes In Equity [Abstract]
| Concept |
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 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
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 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||
| Equity |
2 249
NOK
|
3 133
NOK
|
5 765
NOK
|
— | — |
6 649
NOK
|
— | — | — |
2 249
NOK
|
6 261
NOK
|
5 292
NOK
|
— | — | — |
3 219
NOK
|
2 249
NOK
|
5 493
NOK
|
3 018
NOK
|
6 261
NOK
|
| Changes in equity [abstract] | ||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||
| Profit (loss) | — | — | — |
363,000,000
NOK
|
0
NOK
|
— |
0
NOK
|
363,000,000
NOK
|
1 884
NOK
|
— | — | — |
1 884
NOK
|
0
NOK
|
0
NOK
|
— | — | — | — | — |
| Other comprehensive income | — | — | — |
110,000,000
NOK
|
0
NOK
|
— |
0
NOK
|
110,000,000
NOK
|
126,000,000
NOK
|
— | — | — |
126,000,000
NOK
|
0
NOK
|
0
NOK
|
— | — | — | — | — |
| Comprehensive income | — | — | — | — | — | — | — |
473,000,000
NOK
|
1 758
NOK
|
— | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — | — | — | — | — | — | — |
516,000,000
NOK
|
— | — | — |
516,000,000
NOK
|
0
NOK
|
0
NOK
|
— | — | — | — | — |
| Increase (decrease) in equity | — | — | — |
0
NOK
|
388,000,000
NOK
|
— |
0
NOK
|
388,000,000
NOK
|
— | — | — | — | — | — | — | — | — | — | — | — |