Statement Of Changes In Equity [Abstract]
| Concept |
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 |
As at 2021-12-31 |
2021-01-01 to 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 |
As at 2021-12-31 |
As at 2021-12-31 |
2021-01-01 to 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 |
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 |
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 |
As at 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 |
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 changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Equity | — |
131,000,000
NOK
|
48,000,000
NOK
|
103,000,000
NOK
|
1 712
NOK
|
13,000,000
NOK
|
— | — | — |
245,000,000
NOK
|
3 331
NOK
|
49,000,000
NOK
|
5,000,000
NOK
|
— |
116,000,000
NOK
|
909,000,000
NOK
|
— | — | — | — |
68,000,000
NOK
|
13,000,000
NOK
|
224,000,000
NOK
|
185,000,000
NOK
|
16,000,000
NOK
|
1 617
NOK
|
— | — | — | — |
99,000,000
NOK
|
24,000,000
NOK
|
8,000,000
NOK
|
— | — |
2 307
NOK
|
— |
51,000,000
NOK
|
11,000,000
NOK
|
19,000,000
NOK
|
71,000,000
NOK
|
8,000,000
NOK
|
10,000,000
NOK
|
2 187
NOK
|
67,000,000
NOK
|
185,000,000
NOK
|
44,000,000
NOK
|
1 546
NOK
|
224,000,000
NOK
|
| Changes in equity [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
4,000,000
NOK
|
— | — | — | — | — |
1,000,000
NOK
|
73,000,000
NOK
|
10,000,000
NOK
|
— | — | — | — | — | — | — |
5,000,000
NOK
|
146,000,000
NOK
|
55,000,000
NOK
|
145,000,000
NOK
|
— | — | — | — | — | — |
16,000,000
NOK
|
11,000,000
NOK
|
71,000,000
NOK
|
16,000,000
NOK
|
— | — | — |
3,000,000
NOK
|
27,000,000
NOK
|
— |
2,000,000
NOK
|
— | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
147,000,000
NOK
|
— |
155,000,000
NOK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Dividends recognised as distributions to owners | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
15,000,000
NOK
|
15,000,000
NOK
|
15,000,000
NOK
|
— | — | — | — | — | — |
15,000,000
NOK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity |
11,000,000
NOK
|
— | — | — | — | — |
9,000,000
NOK
|
— | — | — | — | — | — | — | — | — |
1,000,000
NOK
|
3,000,000
NOK
|
— |
1,000,000
NOK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
1,000,000
NOK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through treasury share transactions, equity | — | — | — | — | — | — | — | — | — | — | — | — | — |
14,000,000
NOK
|
— | — | — |
14,000,000
NOK
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |